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watching PID controller output value at perticular point

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rathod ujjval rameshbhai
回答： Sam Chak 2023-9-14
I am implementing PID controller on the system 1/s......
My question is when I write the command pidtool and get the new window in that there are list of paramenters..... I want to see the output of controller at perticular point i.e. Pout=Kp*e(t)+P0....
other thing is if my system is 1/s then as in step response it becomes 1/s^2 and then Laplace inverse will give output equation.... in case of only P it would be Kp*e(t)*L^-1(1/s).... is it??

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Sam Chak
Sam Chak 2023-9-14
Ran in:
@rathod ujjval rameshbhai, Since no performance requirements are specified, the pidtune() command can be used to automatically search for the control gains that stabilize the unstable open-loop system.
% Plant (unstable open loop system)
Gp = tf(1, [1 0])
Gp = 1 - s Continuous-time transfer function.
% Compensator
% wc = 1;
% [Gc, info] = pidtune(Gp, 'pid', wc)
[Gc, info] = pidtune(Gp, 'pid')
Gc = 1 Kp + Ki * --- s with Kp = 0.981, Ki = 0.193 Continuous-time PI controller in parallel form.
info = struct with fields:
Stable: 1 CrossoverFrequency: 1 PhaseMargin: 78.8791
% Closed-loop feedback system
Gcl = feedback(series(Gc, Gp), 1)
Gcl = 0.9812 s + 0.1929 ----------------------- s^2 + 0.9812 s + 0.1929 Continuous-time transfer function.
% step response
step(Gcl), grid on

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