Which one of the following provides excellent transient system and steady state response

Which one of the following provides excellent transient system and steady state response:

  1. Proportional + Integral action
  2. Proportional + Differential action
  3. Differential + Integral action
  4. Proportional + Differential + Integral

Correct answer: 4. Proportional + Differential + Integral

Proportional term: The proportional terms produces output value that is proportional to the error value. The response is adjusted by multiplying error by Kp constant.

Integral term: Integral terms is proportional to magnitude and duration of the error. Integral term eliminated residual steady-state error.

Derivative term: Derivative terms is used to improve stability of system

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