7th IEEE International Symposium on Applied Computational Intelligence and Informatics· May 24-26, 2012 • Timi�oara, Romania
Hybrid Fuzzy Controllers for Non-Minimum Phase Systems Radu-Emil Precup, Stefan Preitl, Alexandra-Iulia Stinean, Claudia-Adina Drago� and Mircea-Bogdan Radac
Dept. of Automation and Applied Informatics, "Politehnica" University of Timisoara, Timisoara, Romania
[email protected],
[email protected],
[email protected],
[email protected],
[email protected]
Abstract-The
class
of
non-minImum
phase
systems
modeled by transfer functions with "unstable" zeros is considered as a controlled plant in control systems. The stabilization and control of this class of systems is difficult
The field controlled DC motor (DC-m)-based electrical drives has a linearised equivalent block diagram according to Fig. 2 and the main t.f.s:
�ro(s) il ke ""kE HOOl8uc()= S , �uc()s (+ l sTJ(+ l T s )m
stabilizing because of the unusual bebavior in both time and frequency domains. The paper shows that fuzzy control is a successful control solution for this class of systems. With
�ro(s) l T. s kea -� HOOl8ue ( S )- -k�
