In a feedback control system, what is the effect of increasing the feedback gain

Practice Questions

Q1
In a feedback control system, what is the effect of increasing the feedback gain?
  1. It always makes the system unstable.
  2. It can improve stability and reduce steady-state error.
  3. It has no effect on system performance.
  4. It decreases the system's response time.

Questions & Step-by-Step Solutions

In a feedback control system, what is the effect of increasing the feedback gain?
  • Step 1: Understand what feedback gain is. Feedback gain is a value that determines how much of the output is fed back into the system to adjust the input.
  • Step 2: Recognize that increasing feedback gain means the system will respond more strongly to any difference between the desired output and the actual output.
  • Step 3: Realize that a higher feedback gain can help the system correct errors more quickly, which can improve stability and reduce steady-state error (the difference between the desired output and the actual output when the system is stable).
  • Step 4: Be aware that if the feedback gain is increased too much, it can make the system react too aggressively, which may lead to instability (the system may start to oscillate or behave unpredictably).
  • Step 5: Conclude that while increasing feedback gain can be beneficial, it is important to find a balance to avoid making the system unstable.
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