Читать книгу PID Control System Design and Automatic Tuning using MATLAB/Simulink - Liuping Wang - Страница 25

1 The PID controllers are expressed in terms of the parameters , and . What are the possible signs of , and ?

2 When you increase the magnitude of , do you expect the action of proportional control to decrease or increase? When you increase , do you expect the action of integral control to decrease or increase? when you increase , do you expect the action of derivative control to decrease or increase?

3 What are the roles of integrator in a PID controller?

4 Can you implement the integrating control on output only? If not, explain the reason.

5 In many applications, we will put the proportional control on the feedback error, which is the original PI controller. Can you reduce the overshoot by using a ramp reference signal in the early part of the response?