Question 247General Subjects - 1st Asst/Chief
70% to passAs the engineer, it is necessary to tune a proportional-integral-derivative (PID) control loop. If the PID incorporates all three functions, which function(s) is/are dominant in the controller's performance?
AProportional.
BDerivative and Proportional.
CIntegral and Derivative.
DAll are equally important.
AI Explanation
The correct answer is A) Proportional. In a PID control loop, the proportional function is the dominant factor in the controller's performance. The proportional term provides the main control action, directly responding to the error between the set point and the process variable. The integral and derivative terms serve to improve the overall performance and stability of the control loop, but the proportional function is the primary driver of the controller's output. The other options are incorrect because the proportional term is the most significant component, not the derivative and proportional terms (B), the integral and derivative terms (C), or all being equally important (D).
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