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Which of the following controllers improves the transient response of a system?

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  1. The proportional controller
  2. The proportional and integral controllers
  3. The integral controller
  4. The derivative controller

Answer (Detailed Solution Below)

Option 4 : The derivative controller
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Effects of Proportional Derivative (PD) controllers:

  • Decreases the type of the system by one
  • Reduces the rise time and settling time
  • Rise time and settling time decreases and Bandwidth increases
  • The speed of response is increased i.e. the transient response is improved
  • Improves gain margin, phase margin, and resonant peak
  • Increases the input noise
  • Improves the stability

 

Effects of Proportional Integral (PI) controllers:

  • Increases the type of the system by one
  • Rise time and settling time increases and Bandwidth decreases
  • The speed of response decreased i.e. transient response becomes slower
  • Decreases the steady-state error and steady-state response is improved
  • Decreases the stability

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