Simulation of PID without simulink

Hello!

I am trying to simulate a plant and I cannot simulate output of PID controller. I got PID object by

pidtude(sys, type)

Method returned me a discrete time PID controller just as I wanted, but the problem is that

y = lsim(sys, u)

function cannot be used to simulate response of improper transfer function systems. Is there any other method which can I use to simulate response of pid object knowing input vector? I prefer not using simulink.

Thank you,

Maksym Zawrotny

Answer 1

[David Wilson]

It's unusual to just simulate a PID controller, and yes the D-part typically makes it non-proper. Without adding a fast denominator term or two, this is an ill-advised thing to do.

You can of course simulate the PID & plant, say either with Gc*Gp or using series.

[Maksym Zawrotny]

Thank you, combining transfer functions together made the thing. Another solution is to model PID controller D-action with inertial denominator term.

[Ful0]

Hello,

Can I use a PID controller on Matlab without using Simulink?

I can't find information about that: everything seems referred to Simulink.

Can you help me suggesting me some links, please?

Thank you