I have a system, it's Transfer function is :
1
————
s^3 + 1
and I want to design a Discrete PID Controller so discretized the plant at sampling time 0.05s :
0.000019z^2 + 0.00008z + 0.000021
————————————————- (Sorry, it is not clean..)
z^3 -2.99994z^2 + 3.00006z – 1
This system is unstable and Discrete PID Controller Block's autotuner cannot find Kp, Ki, Kd to stablize the system.
I want to design a PID Controller, not another Controller.
I think it should be added such a filter, derivative filter(Differtiator?) or a Integrator…
How can I design the PID Controller in Matlab and Simulink? It can be designed?
Thanks for read my ask.
Best Answer