Design of Lead, Lag and Lead-Lag Compensators Based on Frequency Response Approach

Abstract

In the control systems, the compensators are widely
used to improve system dynamics, characteristics of the open
loop system and the stability. The degree of convergence of the
output waveform for any compensator depends upon the
proper selection and tuning of the compensator. The dynamic
structure and the control properties of lead, lag and lead-lag
compensators are presented in this work. A simple method
based on the frequency domain is adopted to design the three
different compensators. The parameters which have effect on
each compensator performance were studied and explained
how to choose them to achieve the optimal performance. The
compensator algorithms are implemented with MATLAB
simulation in order to control the DC motor motion. The results
and the comparative analysis confirm the effectiveness of the
proposed three compensators and improve the system
response.