Which one of the following statements is CORRECT for any second order linear system with Proportional Integral Derivative (PID) controller?
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- Integral component decreases residual steady state error
- Integral component integrates the output signal only
- Integral component increases residual steady state error
- Integral component integrates the input signal only
The Correct Option is A
Solution and Explanation
The integral component is responsible for eliminating the steady-state error in a system by continuously integrating the error over time. The result is that the integral action ensures the system reaches the desired setpoint with zero steady-state error, particularly in systems with a constant disturbance or offset.
Therefore, the integral component helps in decreasing the residual steady-state error.
Correct answer: (A)
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