Feb 2, 2020

Artificial Intelligence Deep Learning

This is Chapter 2 of the Artificial Intelligence course

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Deep learning also called deep structured learning or differential programming is a component of a broader family of machine learning strategies supported artificial neural networks with illustration learning. Learning is supervised, semi-supervised or unattended.

Deep learning architectures like deep neural networks, deep belief networks, continual neural networks, and convolutional neural networks are applied to fields together with laptop vision, speech recognition, tongue process, audio recognition, social network filtering, AI, bioinformatics, drug style, medical image analysis, material examination, and parlor game programs, wherever they need to create results similar to and in some cases surpassing human knowledgeable performance.

Artificial neural networks (ANNs) were impressed by IP and distributed communication nodes in biological systems. ANNs have numerous variations from biological brains. Specifically, neural networks tend to be static and symbolic, whereas the biological brain of most living organisms is dynamic and analog.

Deep learning may be a category of machine learning algorithms that uses multiple layers to increasingly extract higher-level options from the raw input. For instance, in the image process, lower layers could establish edges, whereas higher layers could establish the ideas relevant to somebody like digits or letters or faces.

IBM's Deep Blue, which beat chess grandmaster Garry Kasparov at the game in 1996, or Google DeepMind's AlphaGo, which in 2016 beat Lee Sedol at Go, are examples of narrow AI. This differs from artificial general intelligence, which is AI that's considered human level, and may perform a wide range of tasks.

What is deep learning?


The field of AI is actually once machines will do tasks that usually need human intelligence.
 Deep learning could be a set of machine learning wherever artificial neural networks, algorithms impressed by the human brain, learn from giant amounts of information. equally to however we tend to learn from expertise, the deep learning rule would perform a task repeatedly, on every occasion tweaking it a bit to boost the result. We have a tendency to seek advice from ‘deep learning’ as a result of the neural networks have numerous (deep) layers that change learning.  To do any work may be a problem deep learning will learn to resolve.

The amount of information we have a tendency to generate each day is staggering—currently calculable at a pair of 6 large integer bytes and it’s the resource that produces deep learning doable.  This increase in knowledge creation is one reason that deep learning capabilities have an adult in recent years.

In addition to additional knowledge creation, deep learning algorithms get pleasure from the stronger computing power that’s offered nowadays further because of the proliferation of artificial intelligence (AI) as a Service.

The need for machine learning AI Developers, machine learning researchers and engineers are going to increase and consequently is your career chances with the range of this technology expanding every day.
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Application of Artificial Intelligence and Deep learning


Virtual assistants

Whether it’s Alexa or Siri or Cortana, the virtual assistants of on-line service suppliers use deep learning to assist perceive your speech and also the language humans use once they move with them.

 Translations

In a similar means, deep learning algorithms will mechanically translate between languages. This may be powerful for travelers, business folks and people in government.

  Vision for driverless delivery car, drones, and autonomous motor

The means associate degree autonomous vehicle understands the realities of the road and the way to retort to them whether or not it’s a stop sign, a ball within the street or another vehicle is thru deep learning algorithms. The additional knowledge the algorithms receive, the higher they're able to act human-like in their info processing—knowing a stop sign coated with snow remains a stop sign.

  Chatbots and repair bots

Chatbots and repair bots that offer client service for loads of corporations can respond in associate degree intelligent and useful thanks to an increasing quantity of audile and text query due to deep learning.

Image colorization and Face Identification


 Today, deep learning algorithms can use the context and objects within the pictures to paint them to essentially recreate the black-and-white image in color. The results are spectacular and correct.

Biometric authentication

Deep learning is being employed for face recognition not just for security functions except for tagging folks on Facebook posts and that we can be able to purchase things in a very store simply by exploitation our faces within the close to future. The challenges for deep-learning algorithms for face recognition are knowing it’s an equivalent person even once they have modified hairstyles, adult or whiskerless off a beard or if the image taken is poor thanks to unhealthy lighting or associate degree obstruction.

 Medication

From malady associate degreed tumor diagnoses to customized medicines created specifically for an individual’s ordination, deep learning within the medical field has the eye of the many of the biggest pharmaceutical and medical corporations.

 Customized searching and Recreation

Ever surprise however Netflix comes up with suggestions for what you ought to watch next? Or wherever Amazon comes up with ideas for what you should purchase next and people suggestions are precisely what you would like however simply ne'er knew it before?

The additional expertise deep-learning algorithms get, the higher they become. It ought to be a rare few years because technology continues to mature.

Deep learning is a set of machine learning. It technically is machine learning and functions within the same method; however, it's totally different capabilities. The model it by himself. The automated car driving system may be an exemplar of deep learning. It's a subsequent generation of Machine Learning. It’s a subset of Machine Learning. Machine Learning models of the past still need human intervention in many cases to reach the optimal outcome. Deep Learning models use artificial neural networks. the planning of this network is inspired by the biological neural network of the human brain. It analyzes data with a logical structure almost like how people would draw conclusions.

Deep Learning is that the Next Generation of Machine Learning

Deep Learning is that the next generation of machine learning algorithms that use multiple layers to progressively extract higher-level features (or understanding) from raw input. as an example, in image recognition applications, rather than just recognizing matrix pixels, deep learning algorithms will recognize edges at a particular level, nose at another level, and face at yet one more level. With the power to know data from the lower level all the high the chain, a deep learning algorithm can improve its performance over time and reach decisions at any given moment in time.
The power of deep learning algorithms lies in its ability to require both supervised learning tasks also as unsupervised learning tasks.
Deep learning algorithms are now employed by computer vision systems, speech recognition systems, tongue processing systems, audio recognition systems, bioinformatics systems, and the medical system.

The concept of this article is taken from this book so grab it for more details.

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Jan 30, 2020

Explanation of Current Transformer: CT class, Ratio Error, Phase Angle Error in Current Transformer

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Definition of Instrument Transformer

Instrument transformers approach current transformer and voltage transformer are utilized in electric energy gadgets for stepping down currents and voltages of the machine for metering and safety cause. Actually, relays and meters used for protection and metering, aren't designed for excessive currents and voltages.

High currents or voltages of electrical electricity machines can't be without delay fed to relays and meters. CT steps down rated gadget current to 1 Amp or 5 Amp further voltage transformer steps down machine voltages to 110 V. The relays and meters are typically designed for 1 Amp, 5 Amp, and 110 V.

Definition of Current Transformer(CT)

A CT is an instrument transformer wherein the secondary current is considered proportional to primary cutting-edge and differs in a segment from it through ideally 0 degrees.

CT Accuracy Class or Current Transformer Class

A CT is similar to an electrical power transformer to a few extents, however, there is some difference in production and operation precept. For metering and indication reason, the accuracy of ratio, between number one and secondary currents is vital within a regular working variety. Normally accuracy of contemporary transformer required up to 125% of rated current; as due to the fact allowable device contemporary should be underneath 125% of rated current.

Rather the CT core should be saturated after this restriction for the reason that unnecessary electrical stresses due to gadget overcurrent may be prevented from the metering tool related to the secondary of the CT as secondary current does now not go above the desired limit even number one current of the CT rises to a totally excessive price than its ratings. So accuracy inside the working range is the principal criterion of a CT used for the metering cause. The degree of the accuracy of a metering CT is expressed using CT accuracy class or in reality contemporary transformer magnificence or CT class.


But within the case of protection, the CT won't have the accuracy level as right as CT even though it is desired now not to be saturated during high fault current passes through number one. So the center of protection CT is so designed that it would not be saturated for a long-range of currents. If saturation of the core comes at a lower stage of primary current the right reflection of primary current will now not come to secondary, as a result, relays related to the secondary won't feature nicely and protection device loses its reliability.

Suppose, you have one CT with current ratio four hundred/1 A and its safety center is situated at 500 A. If the number one current of the CT becomes one thousand A the secondary cutting-edge will nevertheless be 1.25 Amp as because the secondary cutting-edge will no longer boom after 1.25 Amp due to saturation. If the actuating current of the relay related to the secondary circuit of the CT is 1.5 Amp, it'll not be operated at all even the fault stage of the electrical circuit is a thousand Amp.

The measurement of the accuracy of a safety CT may not be as fine as metering CT however it is also expressed through CT accuracy class or simply current transformer class or CT elegance as within the case of the metering current transformer but in little bit exceptional manner.
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Working Principle of Current Transformer or CT

A CT features with the identical primary working precept of electrical electricity transformer, as we discussed earlier, but here is some distinction. If an electrical power transformer or another general cause transformer, the number one cutting-edge varies with load or secondary current. In the case of CT, the number one current is the device contemporary and this primary cutting-edge or system current transforms to the CT secondary, subsequently secondary cutting-edge or burden current depends upon the primary current of the current transformer.

In a strength transformer, if a load is disconnected, there'll be the simplest magnetizing current flows in the number one. The number one of the strength transformer takes contemporary from the supply proportional to the weight-related with secondary. But in the case of CT, the primary is hooked up in series with energy line. So contemporary via its number one is nothing but the contemporary flows through that power line.

So, from the above statement, it's far clear that if a CT has one flip in primary and 400 turns in the secondary winding, if it has 400 Amp contemporary in primary then it'll have 1 Amp in secondary burden.
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Current Transformer Error

But in an actual Current Transformer (CT), mistakes with which we are related can pleasant be taken into consideration thru a observe of phasor diagram for a CT,

current transformer

Is – Secondary current.

Es – Secondary brought on emf.

Ip – Primary current.

EP – Primarily caused emf.

KT – Turns ratio = Numbers of secondary turns/range of primary turns.

I0 – Excitation current.

Im – Magnetizing aspect of I0.

Iw – Core loss component of I0.

Φm – Main flux.

Let us take flux as a reference. EMF Es and Ep lags in the back of the flux by way of 90°. The value of the passers Es and Ep are proportional to secondary and primary turns. The excitation cutting-edge Io that is made up of additives Im and Iw.

The secondary current I0 lags in the back of the secondary brought on emf Es by using an angle Φ s. The secondary contemporary is now transferred to the number one facet with the aid of reversing Is and multiplied by the turns ratio Kt. The total cutting-edge flows via the number one Ip is then vector sum of Kt Is and I0.

The Current Error or Ratio Error in Current Transformer or CT
From the above passer diagram, it's miles clear that primary contemporary Ip isn't always precisely equal to the secondary current multiplied through turns ratio, i.e. KTIS. This difference is because of the number one current is contributed by using the center excitation current. The mistakes in the current transformer introduced due to this distinction are known as current errors of CT or a few instances ratio errors in a current transformer.


Phase Error or Phase Angle Error in Current Transformer


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For the best CT, the perspective between the primary and reversed secondary current vector is 0. But for a real CT, there's always a distinction in segment among because of the truth that primary contemporary has to supply the issue of the exiting contemporary. The attitude between the above stages is termed as phase angle mistakes in contemporary transformer or CT.

Here within the pharos diagram, it's miles β the phase attitude blunders is usually expressed in minutes.

Cause of Error in Current Transformer

The total number one contemporary is not really transformed in CT. One part of the primary current is consumed for middle excitation and the final is certainly transformers with a turns ratio of CT. There may be errors in the current transformer manner there are each ratio mistakes in the current transformer as well as a segment perspective mistakes in a current transformer.

How to Reduce Error in Current Transformer

It is suitable to reduce these mistakes, for higher performance. For achieving minimal mistakes in current transformer, one can observe the following,


  1. Using a center of excessive permeability and low hysteresis loss magnetic materials.
  2. Keeping the rated burden to the nearer price of the actual burden.
  3. Ensuring minimal length of flux path and increasing cross-sectional vicinity of the core, minimizing joint of the center.
  4. Lowering the secondary inner impedance.

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Diode: Definition, Symbol, V-I characteristics and Bias Operations

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What is a Diode?

A diode is defined as a two-terminal electronic component that only conducts current in one direction so long because it is operated within a specified voltage level. An Ideal diode will have zero resistance in one direction, and infinite resistance within the reverse direction. It acts as a one-way switch and restricts the current in other's directions. The diode also acts rectifier and it can convert AC to Dc current but the efficiency 60% to 75% depends upon loss.

Although within the world, diodes can't achieve zero or infinite resistance. Instead, a diode will have negligible resistance in one direction to allow current flow, and a really high resistance within the reverse direction to prevent current flow. A diode is effectively sort of a valve for a circuit.
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Semiconductor diodes are the most common sort of diode. These diodes begin conducting electricity as long as a particular threshold voltage is present within the forward direction i.e. the “Low resistance” direction. The diode is claimed to be “Forward biased” when conducting current during this direction. When connected within a circuit within the reverse direction i.e. the “High resistance” direction, the diode is claimed to be “Reverse biased”.

A diode only blocks current within the reverse direction i.e. when it's reversed biased while the reverse voltage is within a specified range. Above this range, the reverse barrier breaks. The voltage at which this breakdown occurs is named the “reverse breakdown voltage”. When the voltage of the circuit is above the reverse breakdown voltage, the diode is in a position to conduct electricity within the reverse direction i.e. the “high resistance” direction. This is often why in practice we are saying diodes have a high resistance within the reverse direction – not an infinite resistance.

A PN junction is that the simplest sort of the diode. In ideal conditions, this PN junction behaves as a brief circuit when it's forward biased, and as a circuit when it's within the reverse biased. The name diode springs from “diode” which suggests a tool that has two electrodes. Diodes are commonly utilized in many electronics projects and are included in many of the simplest Arduino starter kits.

Diode Symbol

The symbol of a diode is shown below. The arrowhead points within the direction of conventional current flow within the forward biased condition. meaning the anode is connected to the p side and therefore the cathode is connected to the n side.
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We can create an easy PN junction diode by doping pentavalent or donor impurity in one portion and trivalent or acceptor impurity in other portions of silicon or germanium crystal block. These dopings make a PN junction at the center a part of the block. We will also form a PN junction by joining a p-type and semiconductor device alongside a special fabrication technique. The terminal connected to the p-type is that the anode. The terminal connected to the n-type side is that the cathode.

Working Principle of Diode

A diode’s working rule depends on the interaction of n-type and p-type semiconductors. A semiconductor device has many free electrons and a really few numbers of holes. In other words, we will say that the concentration of free electrons is high which of holes is extremely low in a semiconductor device. Free electrons within the semiconductor device are referred to as majority charge carriers, and holes within the semiconductor device are mentioned as minority charge carriers.

A semiconductor device features a high concentration of holes and a coffee concentration of free electrons. Holes within the semiconductor device are majority charge carriers, and free electrons within the semiconductor device are minority charge carriers.

Unbiased Diode

Now allow us to see what happens when one n-type region and one p-type region are available contacts. Here thanks to concentration differences, majority carriers diffuse from one side to a different. Because the concentration of holes is high within the p-type region and it's low within the n-type region, the holes start diffusing from the p-type region to the n-type region.

Again the concentration of free electrons is high within the n-type region and it's low within the p-type region and thanks to this reason, free electrons start diffusing from the n-type region to the p-type region.

The free electrons diffusing into the p-type region from the n-type region would recombine with holes available there and make uncovered negative ions within the p-type region. Within the same way, the holes diffusing into the n-type region from the p-type region would recombine with free electrons available there and make uncovered positive ions within the n-type region.

In this way, there would a layer of negative ions within the p-type side and a layer of positive ions within the n-type region appear along the junction line of those two sorts of semiconductors. The layers of uncovered positive ions and uncovered negative ions form a neighborhood within the middle of the diode where no charge carrier exists since all the charge carriers get recombined here during this region. The shortage of charge carriers, this region is named the depletion region.

Diode Circuit Diagram

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After the formation of the depletion region, there's no more diffusion of charge carriers from one side to a different within the diode. This is often thanks to the electrical field appeared across the depletion region will prevent further migration of charge carriers from one side to a different.

The potential of the layer of uncovered positive ions within the n-type side would repeal the holes within the p-type side and therefore the potential of the layer of uncovered negative ions within the p-type side would repeal the free electrons within the n-type side. Meaning a possible barrier is made across the junction to stop further diffusion of charge carriers.

Forward Biased Diode

Now allow us to see what happens if a positive terminal of a source is connected to the p-type side and therefore the negative terminal of the source is connected to the n-type side of the diode and if we increase the voltage of this source slowly from zero.

In the beginning, there's no current flowing through the diode. This is often because although there's an external electrical field applied across the diode, the bulk charge carriers still don't get sufficient influence of the external field to cross the depletion region. As we told that the depletion region acts as a possible barrier against the bulk charge carriers.

This potential barrier is named forward potential barrier. The bulk charge carriers start crossing the forward potential barrier only the worth of externally applied voltage across the junction is quite the potential of the forward barrier. For silicon diodes, the forward barrier potential is 0.7 volt and for germanium diodes, it is 0.3 volt.

When the externally applied forward voltage across the diode becomes quite the forward barrier potential, the free majority charge carriers start crossing the barrier and contribute the forward diode current. The diode would behave as a short-circuited path and therefore the forward current gets limited by only externally connected resistors to the diode.

Reverse Biased Diode

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Now allow us to see what happens if we connect the negative terminal of the voltage source to the p-type side and positive terminal of the voltage source to the n-type side of the diode. At that condition, thanks to electrostatic attraction of the negative potential of the source, the holes within the p-type region would be shifted more faraway from the junction leaving more uncovered negative ions at the junction.

In the same way, the free electrons within the n-type region would be shifted more faraway from the junction towards the positive terminal of the voltage source leaving more uncovered positive ions within the junction. As a result of this phenomenon, the depletion region becomes wider. This condition of a diode is named the reverse biased condition. At that condition, no majority carriers across the junction, and that they instead move faraway from the junction. During this way, a diode blocks the flow of current when it's reverse biased.

There are always some free electrons within the p-type semiconductor and a few holes within the n-type semiconductor. These opposite charge carriers during a semiconductor are called minority charge carriers. Within the reverse biased condition, the holes find themselves within the n-type side would easily cross the reverse-biased depletion region because the field across the depletion region doesn't present rather it helps minority charge carriers to cross the depletion region.

As a result, there's a small current flowing through the diode from positive to the negative side. The amplitude of this current is extremely small because the number of minority charge carriers within the diode is extremely small. This current is named reverse saturation current.

If the reverse voltage across a diode gets increased beyond a secure value, thanks to higher electrostatic force and thanks to higher kinetic force of minority charge carriers colliding with atoms, variety of covalent bonds get broken to contribute an enormous number of free electron-hole pairs within the diode and also the process is cumulative.

V-I characteristics of the Diode

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It is a voltage and current graph to know about the diode character in forward and reverse biased. Diode forward voltage is (VT), Reverse saturation current (IS), Reverse breakdown voltage, Maximum allowable forward current, and power dissipation.
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**The huge number of such generated charge carriers would contribute an enormous reverse current within the diode. If this current isn't limited by an external resistance connected to the diode circuit, the diode may permanently be destroyed**.

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Dec 18, 2019

Introduction to Artificial Intelligence


This is chapter 1 of the Artificial Intelligence course 

Artificial Intelligence is an approach to create a laptop, a robot, or a product to suppose however good human suppose. AI could be a study of however human brain suppose, learn, decide and work, once it tries to resolve issues. and eventually, this study outputs intelligent package systems. The aim of AI is to boost computer functions that are related to human data, as an example, reasoning, learning, and problem-solving.

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The intelligence is intangible. it is a content of

  1. Reasoning
  2. Learning
  3. Problem resolution
  4. Perception
  5. Linguistic Intelligence

The objectives of AI analysis are reasoning, information illustration, planning, learning, tongue process, realization, and skill to maneuver and manipulate objects. There square measure long goals within the general intelligence sector.

Approaches embody arithmetic ways, procedure intelligence, and ancient committal to writing AI. Throughout the AI analysis associated with search and mathematical improvement, artificial neural networks and ways supported statistics, likelihood, and economic science, we tend to use several tools. Technology attracts AI within the field of science, mathematics, psychology, linguistics, philosophy than on.


Applications of AI

  1.  Cybersecurity: Our cyber always are controlled via Artificial Intelligence. Internet and its security depend upon the language form of Artificial Intelligence.
  2. Game:- AI plays a vital role in a machine to consider an outsized range of potential positions supported deep data in strategic games. For example, chess, watercourse crossing, N-queens issues, etc.
  3. Tongue process:-The Artificial Intelligence acts with the pc that understands the tongue spoken by humans.
  4. knowledgeable Systems:- Machine or package gives explanations and recommendations to the users.
  5. Vision Systems:- Systems perceive, explain, and describe visual input on the computer.
  6. Speech Recognition:- Some AI-based speech recognition systems have the power to listen to and specific as sentences and perceive their meanings whereas individual talks thereto. As an example Siri and Google assistant.
  7. Handwriting Recognition:-The handwriting recognition package reads the text written on paper and acknowledge the shapes of the letters and convert them into editable text.
  8. Intelligent Robots:- Robots will perform the directions given by a personality.

Why we need Artificial Intelligence?


We individuals in today’s world are hearing the word AI. however, the majority don’t understand specifically what will this computer science mean? what is more why it's necessary in today’s world? however these days the folks don't recognize that this computer science has been everyplace in today's world. for each decade, the population is being exaggerated quickly. and also the hidden indisputable fact that we want to grasp is that we tend to were already victimization computer science. however, the folks still assume that term is new and that we ought to apply. and also the major reason why can we want AI is that due to the population.





So does one assume that population is that the reason for the involvement of Artificial Intelligence? affirmative, because, the population is being the exaggerated day these days. and also the necessities of the consumer are every day. thus these days the organization cannot afford the on-demand consumer demand during a stipulated quantity of your time. thus during this state of affairs, they have another to over the matter. the choice, that we've got these days is that the application of computer science. Click computer science on-line coaching to grasp however will it solve the matter.


Need for Artificial Intelligence :

Before attending to recognize the necessity for AI, let Maine 1st inform you what's Artificial Intelligence?

Artificial Intelligence is the simulation of the process by machines (computer systems). These processes embrace educational, reasoning, and self-correction.

We need artificial intelligence (AI) as a result of the work that we want to try and do is increasing every day. thus it’s a decent plan to automatize the routine work. this protects the men of the organization and additionally will increase productivity. to boot, through this computer science, the corporation can even get expert persons for the event of the corporation. What are more the businesses these days assume that they require to mechanize all the regular and routine work? and that they assume they will automatize those regular works through the easy program as a result of, with the event of knowledge science,  automation becomes additional common. the applying of this AI is majorly seen at the web site chat portal. You folks once you come back to the websites most likely seen the welcome message. Then once actual speech communication sometimes starts.

So this Powerful artificial intelligence has divided into four classes. thus currently.

Reactive machines :

A good example of this Reactive machine is Deep blue. And this can be sometimes applied in Chess Board. this may determine the items of the checkerboard and build predictions. however, the disadvantage is that it doesn't have memory. It means, it cannot use past experiences to predict the longer term. thus it simply uses the present scenario and simply moves the pawn. it's supposed for the applying of a little scenario. things may well be handled among an instant itself.

Limited Memory :

This type of AI is applied wherever there's a necessity for memory. Some machines work supported expertise. It suggests that info concerning the constant factors that happened within the past and will the present work consequently. this sort of AI majority utilized in the areas of self-driving cars. It uses its memory to act in things like traffic collisions.

Theory of mind :

This type of AI refers to the understanding of different behaviors and do the work per It includes the sensation.  the intention, moves of the opposite person. In general, this type of AI still doesn't exist. And these days most of the scientists ware operating onerous to induce it much.

Self-awareness:

Like the on top of the kind, this sort of AI systems, ought to bring much. They assume that these systems ought to have awareness and should have the aptitude to grasp the sensation of others

Knowledge reasoning 

Planning

Machine Learning

Natural Language Processing

Computer Vision

Robotics

read full details here   Artificial Intelligence


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Dec 16, 2019

Stepper Motor Basics: Working Principle, Type, Application

A stepper motor is a mechanical device it converts electric power into mechanical power. Also, it's a brushless, synchronous motor which will divide a full rotation into an expansive variety of steps. The motor’s position is often controlled accurately with a none feedback mechanism. Stepper motors are like switched reluctance motors.
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The stepper motor uses the speculation of operation for magnets to create the motor shaft flip an exact distance once a pulse of electricity is provided. The stator coil has eight poles, and therefore the rotor has six poles. The rotor would force twenty-four pulses of electricity to maneuver the twenty-four steps to create one complete revolution. differently, to mention this is often that the rotor can move exactly 15° for every pulse of electricity that the motor receives.

Stepper motor may be a brushless DC motor that rotates in steps are very helpful as a result of it can be exactly positioned with none feedback sensing element, which represents an open-loop controller. The stepper motor consists of a rotor that's typically a static magnet and it's enclosed by the windings of the stator coil. As we tend to activate the windings step by step during a specific order and let a current flow through them they'll magnetize the stator coil and build magnetism poles severally that may cause propulsion to the motor. thus that’ the essential working rule of the stepper motors.

Types of Stepper Motor:

There are three types of stepper motors


  1. Permanent magnet stepper
  2. Hybrid synchronous stepper
  3. Variable reluctance stepper 

Permanent Magnet Stepper Motor: permanent magnet motors use a static magnet within the rotor and operate the attraction or repulsion between the rotor magnet and also the stator coil electromagnets.
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Variable Reluctance Stepper Motor: Variable reluctance motors have an obvious iron rotor and operate supported the principle that minimum reluctance happens with minimum gap, thus the rotor points are attracted toward the mechanical device magnet poles.

Hybrid Synchronous Stepper Motor: Hybrid stepper motors are named as a result of they use a mix of the static magnet and variable reluctance (VR) techniques to realize the most power in little package size.

Operation of Stepper Motor:

Stepper motors operate otherwise from DC brush motors, that rotate once the voltage is applied to their terminals. Stepper motors, on the opposite hand, effectively have multiple toothed electromagnets organized around a central gear-shaped piece of iron. The electromagnets are energized by an external negative feedback circuit, as an example, a microcontroller.
To make the motor shaft flip, 1st one magnet is given power, which makes the gear’s teeth magnetically interested in the electromagnet’s teeth. the purpose once the gear’s teeth area unit is so aligned to the primary magnet, they're slightly offset from the successive magnet. thus once a successive magnet is turned ON and therefore the 1st is turned OFF, the gear rotates slightly to align with successive one and from there the method is perennial. every one of these slight rotations is named a step, with a whole number of steps creating a full rotation. therein means, the motor is turned by an exact. Stepper motor doesn’t rotate ceaselessly, they rotate in steps. There are four coils with a 90o angle between one another fixed on the stator coil. The stepper motor connections are determined by the method the coils are interconnected. during a stepper motor, the coils aren't connected.
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 The motor contains a 90o rotation step with the coils being energized during a cyclic order, decisive the shaft rotation direction. The operating of this motor is shown by operative the switch. The coils are activated asynchronously in 1-sec intervals. The shaft rotates 90o whenever consecutive coil is activated. Its low-speed force can vary directly with current.

The output of the timer is employed as a clock for 2 7474 twins ‘D’ flip-flops (U4 and U3) designed as a hoop counter. once power is at the start switched on, solely the primary flip-flop is ready (i.e. q output at pin five of U3 are at logic ‘1’) and therefore the alternative 3 flip-flops are reset (i.e. the output of q is at logic 0). On receipt of a clock pulse, the logic ‘1’ output of the primary flip-flop gets shifted to the second flip-flop (pin nine of U3). so logic one output keeps shifting circularly with each clock pulse. q outputs of all the four flip-flops are amplified by Darling-ton semiconductor arrays within ULN2003 (U2) and connected to the stepper motor windings orange, brown, yellow, black to sixteen, 15,14, thirteen of ULN2003 and therefore the red to +ve provide.

Advantages of Stepper Motor:

  1. The rotation angle of the motor is proportional to the input pulse.
  2. The motor has full force at standstill.
  3. Precise positioning and repeatability of movement since sensible stepper motors have an accuracy of three – five-hitter of a step and this error is additive from one step to follow.
  4. Excellent response to the beginning, stopping and reversing.
  5. Very reliable since there aren't any contact brushes within the motor. so the lifetime of the motor is solely dependent on the lifetime of the bearing.
  6. The motor's response to digital input pulses provides open-loop management, creating the motorless complicated and fewer expensive to manage.
  7. It is the potential to realize terribly low-speed synchronous rotation with a load that's directly coupled to the shaft.
  8. A wide vary of motion speeds will be complete because the speed is proportional to the frequency of the input pulses.

Applications:

  1. Industrial Machines – Stepper motors area unit employed in automotive gauges and machine tooling machine-controlled production instrumentation.
  2. Security – new police investigation product for the safety trade.
  3. Medical – Stepper motors area unit used within medical scanners, samplers, and additionally found within digital dental photography, fluid pumps, respirators, and blood analysis machinery.
  4. Consumer physics – Stepper motors in cameras for automatic photographic camera focus and zoom functions.

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Dec 11, 2019

Success of Elon Musk and His Companies



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We can say Elon Musk is Tony Stark in modern Science. He has a Futuristic mindset and a great thinker. Elon Musk doesn't believe in Luck, he believes in Karma. A great entrepreneur and a billionaire. He failed 100 times but he wins only 1 time and the world knows that who is Elon Musk.  He thinks beyond the possibility, anyone can't think about that but Elon Musk!!

Who is Elon Musk?

Elon Reeve Musk could be a South African-born American enterpriser and businessperson who founded X.com in 1999 (which later became PayPal), SpaceX in 2002 and Tesla Motors in 2003. Musk became a multimillionaire in his late 20s once he sold his start-up company, Zip2, to a division of Compas Computers. 


Musk created headlines in could 2012, once SpaceX launched a rocket that may send the primary business vehicle to the International satellite. He bolstered his portfolio with the acquisition of SolarCity in 2016 and cemented his standing as a leader of a trade by usurping a consultive role within the time of presidential administration.

When he was 12 he creates a software game first software computer game and sold it at 500 billion dollars to a company. 
A 12 years old child did this anyone can't imagine.


Elon Musk's Companies and Businesses

From his childhood, he loved to grow and a business-oriented mindset. He thinks about beyond our technology and created many companies. 

Zip2 Corporation

Musk launched his 1st company
y, Zip2 Corporation, in 1995 together with his brother, Kimbal Musk. A web town guide, Zip2 was shortly providing content for the new websites of each The new york times and therefore the Chicago apsis. In 1999, a division of Compaq pc Corporation bought Zip2 for $307 million in money and $34 million available choices.

PayPal

In 1999, Elon Musk and Kimbal Musk used the cash from their sale of Zip2 to found X.com, an internet monetary services/payments company. An X.com acquisition the subsequent year lead to the creation of PayPal because it is understood these days.

In Oct 2002, Elon Musk earned his 1st billion once PayPal was noninheritable by eBay for $1.5 billion available. Before the sale, Musk owned  11 % of PayPal stock.


Tesla Motors

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Elon Musk is that the co-founder, chief executive officer, and product creator at Tesla Motors, an organization shaped in 2003 that are dedicated to manufacturing reasonable, mass-market electrical cars still as battery product and star roofs. Elon Musk oversees all development, engineering, and style of the company's product.
Roadster, Model S, Model 3, Semi Truck, Model Y and Roadster
these are the best product of Tesla Motor.

SolarCity

In August 2016, in Musk’s continued effort to push and advance property energy and product for a wider client base, a $2.6 billion greenback deal was coagulated to mix his motorcar and alternative energy corporations. His Tesla Motors INC. proclaimed associate degree all-stock deal purchase of SolarCity corporation, a corporation Musk had helped his cousins begin in 2006. he's a majority shareowner in every entity.

“Solar and storage are at their best once they are combined. Collectively company, Tesla (storage) and SolarCity (solar) will produce a totally integrated residential, industrial and grid-scale product that improves the method that energy is generated, keep and consumed”. scan an announcement on Tesla’s web site regarding the deal.


The Boring Company

In January 2017, Musk launched The Boring Company, an organization dedicated to boring and building tunnels to cut back street traffic. He began with a check dig on the SpaceX property.


In late October of that year, Elon Musk denotes the primary photograph of his companies achieves his Instagram page. He aforesaid the 500-foot tunnel, which might usually run parallel to interstate 405, would reach a length of 2 miles in some four months.

SpaceX

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Elon Musk based his third company, house Exploration Technologies Corporation, or SpaceX, in 2002 to build orbiter for an industrial voyage. By 2008, SpaceX was well established, and NASA awarded the corporate the contract to handle product transport for the International Space Station—with plans for traveler transport within the future—in a move to exchange NASA’s own space vehicle missions.

Success of SpaceX

SpaceX lead Elon Musk to his great success it's a first privet space research company. A great space company and Elon Musk isn't a space scientist but read the books and create this company. Elon Musk read 1000 books according to this science. He is a quick learner and he learns from his failure. A billionaire who has futuristic thoughts and promise that space vehicle with low cost. He wants a commercial space vehicle to Mars.  No one trusts about that but he thinks about the future, somedays or somehow he can do this isn't so far.


Elon Musk’s Inventions & Innovations

Hyperloop

In August 2013, Musk discharged a thought for a replacement style of transportation referred to as the "Hyperloop," associate invention that may foster commutation between major cities whereas severely cutting time. Ideally proof against weather and battery-powered by renewable energy, the Hyperloop would propel riders in pods through a network of low-pressure tubes at speeds reaching quite 700 mph. Elon Musk noted that the Hyperloop might take from seven to ten years to be engineered and prepared to be used.

Although he introduced the Hyperloop with claims that it might be safer than a plane or train, with an associate calculable price of $6 billion — about a tenth part of the value for the rail system planned by the state of the American state — Musk's construct has drawn skepticism. All the same, the enterpriser has wanted to encourage the event of this concept.

After he declared a contest for groups to submit their styles for a Hyperloop pod model, the primary Hyperloop Pod Competition was command at the SpaceX facility in January 2017. A speed record of 284 mph was set by a German student engineering team at competition No. 3 in 2018, with an equivalent team pushing the record to 287 mph future year.


AI and Neuralink


Musk has pursued an interest in computer science, turning into co-chair of the non-commercial OpenAI. The analysis company launched in late 2015 with the declared mission of advancing digital intelligence to learn humanity.

In 2017, it absolutely was jointly reported that Musk was backing a venture referred to as Neuralink, which intends to make devices to be deep-seated within the human brain and facilitate folks merge with code. He distended on the company's progress throughout a Gregorian calendar month 2019 discussion, revealing that its devices can accommodate a microscopic chip that connects via Bluetooth to a smartphone. 


High-Speed Train


In late November 2017, once Chicago civil authority Rahm Emanuel asked for proposals to make and operate a high-speed line that may transport passengers from hare airfield to downtown Chicago in twenty minutes or less, Musk tweeted that he was all-in on the competition along with his Boring Company. He is aforesaid that the construct of the Chicago loop would vary from his Hyperloop, its comparatively short route not requiring the necessity for drawing a vacuum to eliminate air friction.

In summer 2018 Elon Musk declared he would cowl the calculable $1 billion required to dig the 17-mile tunnel from the airfield to downtown Chicago.


Flamethrower



Musk conjointly reportedly found a marketplace for The Boring Company's flamethrowers. Once asserting they were occurring sale for $500 for each one in late January 2018, he claimed to own sold-out ten,000 of them inside daily.

All the information are taken from a great book 



I learn many things and many facts about Elon Musk and I really love this book If anyone wants then buy this type of book and know many things about the Science Fact. Also If you want to stay updated then read our blogs

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Dec 10, 2019

Electromagnetic Induction and Faraday’s Laws

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Electromagnetic Induction fully based on two consecutive electromagnetic induction laws, these two laws are 

  1. Faraday's Electromagnetic Induction First Law
  2. Faraday's Electromagnetic Induction second Law
So, The First Question that arriving in your Mind is 

What do we understand by Electromagnetic Induction?

For Change in Magnetic field electromotive force (emf) is generated in the conductor. This electromotive force produces Electromagnetic Induction. This electromagnetic induction is produced mainly due to magnetic flux.

The Electromagnetic Force is 


e = N × (dΦ/dt)



Where



e = Electromagnetic Force or voltage induced (measured in volts(v))


t = time (measured in seconds(s))

N = number of turns in the coil

Φ = magnetic flux (measured in Webers(w))


How Electromagnetic Induction Can be Generated?


Electromagnetic induction will be generated in 2 ways that, specifically once the electrical conductor is kept in an exceedingly moving magnetic flux and once the electrical conductor is consistently moving inside a static magnetic flux. The development of magnetic force induction was 1st discovered by Michael Faraday when he moved a magnet through an electrical coil. He noticed a modification within the voltage of the circuit. He later deduced the factors that might influence the electromagnetic induction because of the number of coils, the strength of the magnet, the dynamical magnetic fields and also the speed of relative motion between coil & magnet.



The number of turns within the coils/wire is directly proportional to the induced voltage. In different words, a larger voltage is generated once the quantity of turns is higher. The dynamical field of force also influences the voltage that is induced. The speed of the relative motion between the coil and magnet was conjointly found to have an effect on the induced voltage or electromagnetic induction as an increase in velocity cuts the lines of flux at a quicker rate. This ends up in additional induced electromagnetic force or voltage.


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 Faraday's Laws of Electromagnetic Induction


Faraday's Laws depend on the electromagnetic property of any phenomenon.  This law is based on how a magnetic material interacts with other conducting material. These interactions or changes create Electromagnetic force and this process is known as electromagnetic induction. This law also follows the Lenz's lawThe magnetic field created by the induced current opposes the cause of his generate a magnetic field that is produced. Fleming’s right-hand rule can determine the direction of the flow of current.) 

Faraday's Electromagnetic Induction First Law

Any change within the magnetic flux of a coil of wire can cause a voltage to be induced within the coil. This electromotive force induced is termed induced voltage and if the conductor circuit is closed, the current also will flow into through the circuit and this current is termed induced current.

Method to alter the magnetic field:


  1. By moving a magnet towards or faraway from the coil.
  2. By moving the coil into or out of the magnetic flux.
  3. By dynamic the area of a coil placed within the magnetic flux.
  4. By rotating the coil relative to the magnet.

 Faraday's Electromagnetic Induction second Law

It states that the magnitude of electromotive force induced within the coil is up to the rate of change of flux that linkages with the coil. The flux linkage of the coil is that the product of the number of turns within the coil and flux related to the coil.

According To Faraday's laws

The Initial magnetic flux is = Φ1
The Final Magnetic Flux is = Φ2
the change in flux is = Φ2 - Φ1 = dΦ

e = Electromagnetic Force or voltage induced (measured in volts(v))



t = time (measured in seconds(s))

N = number of turns in the coil

Φ = magnetic flux (measured in Webers(w))

then the electromagnetic force is e = -N × (dΦ/dt)


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Dec 5, 2019

Chandrayaan 2 Orbiter located Vikram lander on Lunar Surface and Refused NASA

ISRO Chief k.Sivan Rejects NASA Claim on Chandrayaan 2






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Nasa said the trash, as settled by Subramanian, is regarding 750 meters northwest of the most crash location wherever Vikram created a tight landing on Sept 7. Isro's Chandrayaan, a pair of the mission, was expected to form a soft landing on the Moon's surface once it lost contact with the Vikram lander promptly than the registered arrival. 

Nasa had since created many tries to find the Chandrayaan a pair of the lander with the assistance of LRO, that flew over Vikram's landing location once on September 17 and next on Oct 14.

The government had said some weeks agone, Chandrayaan 2's Vikram lander hard-landed on Moon's surface as a reduction in speed throughout its descent didn't match with the designed parameters.

In a written reply to a matter within the Lok Sabha, Jitendra Singh, the minister of the state within the Prime Minister's workplace, who takes care of the department of space. We considered the first part of the drop was performed nominally from an altitude of 30 km - 74 km higher than the moon's surface, and speed was reduced from 1683 meters/second to 146 meters/second.

The indigenously developed Chandrayaan-2 artificial satellite comprising of an orbiter, lander, and rover was with success launched on-board the native GSLV MK III-M1 Mission in July twenty-two.


Isro chief K Sivan has rejected Nasa's claims.


 that need to be situated the trash of the crashed Vikram lander on the satellite surface and mentioned the Indian space Research Organisation had located it long back.



Isro chief K Sivan has mentioned, "Our own artificial satellite had situated Vikram lander. we have a tendency to had already declared that on our location, it'll be able to return and see."



On Tuesday, NASA discharged some pictures showing the location of the Vikram lander's impact and, therefore, the the} associated trash field, whereas also acknowledging the role of a Chennai-based applied scientist and app developer in locating the location of the trash.


Space enthusiast Shanmuga Subramanian noticed the crashed Vikram lander on the satellite surface when scouring through the photographs released by the United States Space agency's Moon orbiting ballistic capsule.
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Three days when Vikram lander crashed on the lunar surface, on Sep ten, Isro had tweeted, "Vikram Lander has been situated by the artificial satellite of Chandrayaan two, however no communication with it, however. All doable efforts are being created to determine communication with a lander."

After accomplishing four specific earth movements and trans-lunar injection, the satellite was with success inserted within the satellite orbit on August twenty. A series of moon-bound changes were then applied to attain a satellite orbit of 119 x 127 kilometres.

Were they very the junk of Indian Moon lander Vikram as declared by the US space agency on Tuesday, questioned a senior official of the Indian space agency.



Interestingly, the Indian space agency Indian Space Research Organisation (Isro) is maintaining a sound silence on the matter as there's no mention of the findings of  National Aeronautics and Space Administration(Nasa) on its location or on its social media locations.



Releasing pictures of the satellite surface taken by its lunar reconnaissance mission Orbiter Camera (LROC), the United States space agency NASA confirmed that the junk of Vikram is found.



The NASA had attributable a Chennai-based code skilled Shanmuga Subramanian for identification of Vikram's junk.

Meanwhile, Tapan Misra, Senior authority at Isro learning the pictures discharged by the United States space agency, mentioned, "Today, NASA discharged LRO pictures of Chandrayan-2 emergency landing location. Terribly fascinating pictures. I modified several standard concepts I had in my mind."

The Vikram as mentioned above with partly burnt fuel should have had a mass of 700-800 kilogram (original weight was one,471 kg), kind of like that of a sedan automotive or any low craft. And as per Isro information, it absolutely was travelling at a speed of 534 kilometres per hour, speed of a jet craft.

"With this impact like a jet crash on satellite regolith, excellent dirt of 0.5 m to 5-6 m thick covering of satellite surface, I expected an excellent upheaval within the 1st impact location, spreading around ten m or additional across."

"Almost sort of a tiny crater or dent. In fact, the mud or junk might jump up rather more than on the world, as satellite gravity is one-sixth of that of the world. But, astonishingly not one modification in dent one will see, except natural brightness variation," Misra said.

Citing the unexhausted fuel on the lander, Misra expected some dark patches of burnt signs on the satellite surface because the fuel might have spilt on impact and burnt for a minute since each -- fuel and oxidiser -- were present.

"But nothing like this is often seen. Also, I expected some junk left behind at the first impact location. But, I might see none," Misra detected.

On the junk front, Misra additionally created another fascinating purpose oral communication all the junk attended get strewn, dominantly on a linear patch rather than obtaining spread all around, considering randomness in the rebounding of broken items once the primary crash.

"During 1st impact at high speed, the lander would have gotten compressed and broken. They keep energy due to compression would have gotten released next, by abandonment the broken items of the lander in several arbitrary  directions."

Lander Vikram was separated, as planned, from the satellite on Sept a pair of, 2019. When 2 prosperous de-orbiting movements, high-powered descent of the lander was initiated on Sept seven to attain soft landing on the moon surface.

The Isro is about to launch Chandrayaan three in all probability in Nov next year. Know more About ISRO next mission Read Now




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Dec 4, 2019

Explanation of Indian Space Research Organisation (ISRO) and Upcoming Projects

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Introduction About ISRO

India set to travel to space once the National Committee for space analysis (INCOSPAR) was originated by the govt. Of India in 1962. With the visionary Dr Vikram Sarabhai at its helm, INCOSPAR originated the Thumba Equatorial rocket-firing Station (TERLS) in Thiruvananthapuram for higher part analysis.

ISRO has upheld its mission of conveyance space to the service of the somebody, function of the state. Within the method, it's become one in all the six largest space agencies within the world. ISRO maintains one in all the biggest fleet of communication satellites (INSAT) and remote sensing (IRS) satellites that cater to the ever-growing demand for quick and reliable communication and earth observation severally.

ISRO's Timeline of Projects

Indian space analysis Organisation, shaped in 1969, outdated the erstwhile INCOSPAR. Vikram Sarabhai, having known the role and importance of space technology during a Nation's development, provided ISRO with the mandatory direction to operate as an agent of development. ISRO then began its mission to produce the state space primarily based services and to develop the technologies to attain identical severally.

 ISRO develops and delivers application specific satellite products and tools to the Nation: broadcasts, communications, weather forecasts, disaster management tools, Geographic info Systems, devising, navigation, telemedicine, dedicated distance education satellites being a number of them.

To achieve complete self-reliance in terms of those applications, it absolutely was essential to develop price economical and reliable launch systems that took form within the style of the Polar Satellite Launch Vehicle (PSLV). The famous PSLV went on to become a favoured carrier for satellites of varied countries thanks to its responsibility and price potency, promoting unexampled international collaboration. The fixed Satellite Launch Vehicle (GSLV) was developed, keeping in mind the more massive and a lot of hard fixed communication satellites.

Apart from technological capability, ISRO has additionally contributed to science and science education within the country. Numerous dedicated analysis centres and autonomous establishments for remote sensing, physical science and astronomy, part sciences, and space sciences usually operate below the aegis of the Department of space. ISRO's own satellite and heavenly body missions alongside different scientific come to encourage and promote science education, aside from providing valuable information to the scientific community that successively enriches science.

Future of ISRO

Future readiness is that the key to maintaining a position in technology and ISRO endeavours to optimise and enhance its technologies because the wants and ambitions of the country evolve. Thus, ISRO is moving forward with the event of severe raise launchers, human space travel comes, reusable launch vehicles, semi-cryogenic engines. Single and 2 stages to orbit (SSTO and TSTO) vehicles, development and use of composite materials for space applications, etc.

Upcoming Projects of ISRO

Chandrayaan 3:- Chandrayaan 2 repeat with Lander and rover for a soft landing. It will be going to attempt in 2020. Although additional details on a similar are going to be undraped within the time to come back, the newest development appears to the point that the ISRO Chandrayaan three mission might possibly turn up. The Chandrayaan two mission that was launched on 22 July 2019 didn't go as planned once the Indian house analysis Organisation lost contact with the Vikram Lander minutes before its tried soft-landing on the moon. However, the equipment of the Chandrayaan two mission continues to orbit the moon and supply perceptive info on the Moon. Chandrayaan two is conducting studies of the satellite surface and also detected of Argon-40 within the lunar exosphere

Gaganyaan:- It is Associate in Nursing "Orbital Vehicle" that's Associate in Nursing Indian orbital space vehicle. Collectively made-up by ISRO and HAL meant to be the idea of the Indian Human Spaceflight Programme. It's the primary Indian space vehicle that will carry humans to space. The space vehicle is being designed to hold 3 individuals, and a planned upgraded version will be equipped with rendezvous and arrival capability.

This HAL-manufactured crew module had its initial un-crewed experimental flight on eighteen Dec 2014. The crewed vehicle is planned to be launched on ISRO's GSLV Mk III in Dec 2021. Before this, it'll be launched un-crewed for check flights in Dec 2020 and July 2021. The 3 crew members can stay in space for seven days.

Lunar Polar Exploration Mission:- Lunar Polar Exploration Mission could be an idea mission by JAXA and ISRO to explore the South Pole region of the Moon in 2024. The mission idea has not nevertheless been formally planned for funding and designing. The satellite Polar Exploration Mission could be a robotic lunar mission idea by Japan's house agency JAXA and Indian house analysis Organisation (ISRO). That will send a lunar rover and lander to explore the South Pole region of the Moon in 2024. JAXA is probably going to produce the under-development H3 launch vehicle and also the rover, whereas ISRO would be chargeable for the lander. The mission idea has not nevertheless been formally projected for funding and designing.

In Nov 2019, ISRO officers expressed that a brand new satellite lander mission was being studied for launch in Nov 2020; this new proposal is named Chandrayaan-3. It might be performed by ISRO alone as a repeat arrange to demonstrate the landing capabilities required for the satellite Polar Exploration Mission projected in partnership with Japan in 2024.

Aditya-L1:- The probe is called as Aditya-L1 and can weigh regarding four hundred kilograms. It's the primary Indian-based star Coronagraph to check star Corona invisible and close to IR bands. The launch of the Aditya mission was planned throughout the high star activity amount in 2012 however was delayed to 2015–2016 thanks to the in-depth work concerned within the fabrication and different technical aspects. The most objective is to check the lei Mass Ejection (CME). Consequently, the crucial physical parameters for house weather like the lei field of force structures, the evolution of the lei field of force, etc. this may offer entirely new data on the speed fields and their variability within the inner corona have a crucial referring to the unsolved  drawback of heating of the corona would be obtained. 

Aditya was conceptualised in Jan 2008 by the consultative Committee for house analysis. It absolutely was ab initio envisaged as a small four hundred kilogram, low-Earth orbiting satellite with a coronagraph to check the star corona. A preliminary budget of three large integer INR was allotted for the fiscal year 2016—2017. The scope of the mission has since been enlarged, and it's currently planned to be a full star and house surroundings observatory to be placed at the Lagrangian purpose. Therefore the mission was renamed "Aditya-L1". As of Gregorian calendar month 2019, the mission has AN allotted value of ₹378.53 large integers excluding launch prices.

NISAR:- The Space Administration NASA-ISRO Scientific Aperture radar detection and ranging (NISAR) mission may be a joint project between NASA and ISRO to co-develop and launch a twin frequency synthetic aperture radar on an Earth observation satellite. The satellite is the primary microwave radar imaging satellite to use dual frequencies. It'll be used for remote sensing, to watch and perceive natural processes on Earth. As an example, its right-facing instruments can study the Antarctic cryosphere. Nasa-Isro artificial Aperture microwave radar|radio detection and measuring system (Nisar) may be a joint project between NASA and ISRO to co-develop and launch a twin frequency synthetic aperture radar satellite to be used for remote sensing. It's notable for being the primary dual-band microwave radar imaging satellite. With a full price calculable at US$1.5 billion, NISAR is probably going to be the world's most costly Earth-imaging satellite. 

Other Upcoming Projects:-

RISAT-1A, Mangalyaan 2, Sukrayaan 1, etc. The economy of India keeps its impact on the projects, but Isro can find a way to solve it. ISRO always prove that nothing is impossible, Fear is in our mind. For more info, click here

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