zn3pd

Ziegler-Nichols PD controller for processes of third order. The controller uses reference variable (w) just in proportional component.

Transfer function of the controlled system:

Vector of identification initial parameter estimations:

Controller specific parameters:

None.

Control law:

This form of control law can be transformed to feedback feedforward form:

where controller parameters ,  and  are calculated using following equation:

 

Variables  and  are ultimate gain and ultimate period respectively.

Source code:

sid

on-line identification s-function

zn3pd

function for computation of controller parameters

scrqp

controller s-function

See also:

On-line identification methods

Computation of ultimate gain and period

List of common controllers parameters