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Analysis of Steady State Error for Non-Unity Feedback System, Control, Electrical Engineering, GATE Video Lecture

FAQs on Analysis of Steady State Error for Non-Unity Feedback System, Control, Electrical Engineering, GATE Video Lecture

1. What is steady-state error in a control system?
Ans. Steady-state error refers to the difference between the desired output and the actual output of a control system when it has reached a stable operating condition. It is a measure of the system's ability to accurately track the desired reference input.
2. How is steady-state error analyzed in non-unity feedback systems?
Ans. In non-unity feedback systems, steady-state error can be analyzed using the concept of open-loop transfer function and closed-loop transfer function. By comparing the input and output of the system, the steady-state error can be determined by evaluating the difference between the desired output and the actual output.
3. What factors can contribute to steady-state error in a control system?
Ans. Several factors can contribute to steady-state error in a control system. These include disturbances or noise in the system, non-linearities in the system dynamics, limitations of the actuators or sensors, and inaccuracies in the model used for controller design. All these factors can introduce deviations between the desired and actual outputs, leading to steady-state error.
4. How can steady-state error be minimized in a control system?
Ans. Steady-state error can be minimized by employing various techniques in control system design. Some common approaches include using feedback control, optimizing controller gains, implementing integral control to eliminate steady-state error for constant inputs, and employing feedforward control to compensate for disturbances. System modeling and identification techniques can also be used to improve the accuracy of the control system and reduce steady-state error.
5. What are the implications of high steady-state error in a control system?
Ans. High steady-state error in a control system indicates poor tracking performance and can lead to undesirable consequences. It means that the control system is not accurately following the desired reference input, which can result in reduced system performance, instability, and compromised control objectives. High steady-state error can also affect the system's ability to reject disturbances and can cause deviations from the desired setpoint.
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