Bp 264 en
Frequency-domain Design of Lead and Lag Controllers
Author: Bouška Tomáš
The purpose of this bachelor thesis was the creation of a set of procedures that can be used to
perform a graphical design of Lead and Lag controllers with respect to desired phase margin and
gain margin.
The controller parameters can be found for a system represented by its transfer function using
the implemented method. The solution is drawn as a curve in a plane which is a part of graphical
user interface (GUI). In order to find the solution the system of equations describing the
requirement for open loop frequency response to intersect a point in the complex plane placed to
reflect the desired phase margin or gain margin have to be solved. The environment of the
application MATLAB is used for the method implementation.
Thanks to this thesis a simple tool designed in a bachelor thesis with a close subject could be
modified to allow the design of Lead and Lag controllers.
