Question

A PI controller is preferred when

• A. System has fast dynamics
• B. Eliminating steady-state error
• C. Speed of response is primary concern
• D. System has low noise levels

Hint:

Controller applications: \[ \boxed{ \begin{aligned} \text{P} &\rightarrow \text{Improves response speed} \text{PI} &\rightarrow \text{Eliminates steady-state error} \text{PID} &\rightarrow \text{Improves both transient and steady-state performance} \end{aligned} } \]

Answer 1

The Correct Option is B

Step 1: Recall the function of a PI controller. A Proportional-Integral (PI) controller combines proportional and integral actions. The integral action accumulates the error over time and eliminates the steady-state error.

Step 2: Identify the correct application. Since a PI controller removes steady-state error while maintaining satisfactory transient response, \[ \boxed{\text{PI controller is preferred for eliminating steady-state error}.} \] Therefore, \[ \boxed{(B)} \] is the correct answer.