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Mechanical Engineering QUESTION #2379
Question 1
The transfer function of a PID (Proportional-Integral-Derivative) controller is:
  • \(Y(s) = K + K_I s + K_D s^2\)
  • \(Y(s) = K + \frac{K_I}{s} + K_D s\)✔️
  • \(Y(s) = \frac{K_I}{s} + K_D s\)
  • \(Y(s) = K \cdot K_I \cdot K_D \cdot s\)
Correct Answer Explanation
The PID controller combines all three actions: \(Y(s)=K+\frac{K_I}{s}+K_D s\). P provides immediate response, I eliminates steady-state error, D adds damping and predictive action.