What are compensators used for?

A compensator is an optical device that includes one or more retarder plates and is commonly used to analyze the birefringence of a specimen. For a traditional polarizing microscope, several types of compensators exist that typically use a single fixed retarder plate mounted in a mechanical rotation stage.

What is difference between compensator and controller?

A compensator is a form of controller designed to alter certain characteristics (such as gain/phase) of the open-loop system. The difference between them is as follows: the compensator change the behavior of the open loop system while controller change the behavior of the close loop system.

What is a compensator circuit?

Definition: A lead compensator is an electrical circuit that when provided with a sinusoidal input generates a sinusoidal signal as output with a phase lead in comparison to that of the applied sinusoidal signal. It is also known as lead network.

What is the difference between a PID controller and compensator?

The objective of a controller is to respond to the error, an example of a controller is the PID. On the other hand the objective of a compensator is to change the original dynamics of the plant, examples of compensators are the lead, lag, and lag-lead compensators.

Why compensator is required?

Compensator is used in the control system to improve system dynamics, improve characteristics of the open loop system, and improve stability. The lead/lag compensator, phase compensator is used to improve the stability of the system.

What does a lead compensator do?

The lead compensator increases the gain of the system at high frequencies (the amount of this gain is equal to a). This can increase the crossover frequency, which will help to decrease the rise time and settling time of the system (but may amplify high frequency noise).

How many types of controllers and compensators are there respectively?

There are three types of compensators — lag, lead and lag-lead compensators. These are most commonly used.

What is the need of compensation What are the various types of compensators?

1) In order to provide a suitable performance, it is required to adjust the control system design. 2) This adjustment of a control system is called compensation. 3) A device is inserted into the system for the purpose of satisfying the specification, this device is called a compensator.

How can a PID controller be used as a lead compensator?

PID controller gives better results in the system response, like less overshoot, reduced settling time, less steady state error etc even for nonlinear processes, when perfectly tuned. To achieve more stability for the system, a lead compensator can also be added.

Which compensator improve transient response?

lead compensator
➢ A lead compensator is one which adds a zero the system and is used to improve the transient response of the system.

What are compensation techniques?

It refers to the use of temperature sensitive devices such as diodes, transistors, thermistors which provide compensating voltage and current to maintain Q point stable. With increase of temperature ,R T decreases. Hence the voltage drop across it also decreases.

What is compensated system?

Summary. Control system compensation is the strategy used by the control system designer to improve system dynamic performance through the addition of dynamic elements in order to mitigate some of the undesirable features of the control elements present in the system.