Example question PID controller


QUESTION 

a) State FOUR (4) fundamental requirements for any controller to be able to function 
effectively. 
(4 marks) 

b) With the aid of a diagram, explain the operation of a proportional pneumatic 
 controller and state the relationship between output and input signal. 
(9 marks) 

c) A tri-mode PID controller is used to control an electric motor. Explain how the 
 function of each of the following gains to sustain the stability. 
i. Integral gain Ki 
ii. Proportional gain Kp 

iii. Derivative gain Kd