Title :
Lead/lag compensator design for unstable processes based on gain and phase margin specifications
Author :
Nie, Zhuo-Yun ; Wang, Qing-Guo ; Wu, Min ; He, Yong
Author_Institution :
Sch. of Inf. Sci. & Eng., Central South Univ., Changsha, China
Abstract :
This paper describes lead/lag compensators tuning method based on gain and phase margin specifications for two kinds of unstable processes. A simple and effective graphic method is used to solve a set of nonlinear coupled equations. The solutions are determined from the intersections of the two kinds of curves constructed from gain and phase margin specifications. The results are applied to the tuning of the lead/lag compensator. Examples are provided for illustration.
Keywords :
compensation; control system synthesis; graph theory; nonlinear control systems; nonlinear equations; stability; gain margin; graphic method; lag compensator; lead compensator; nonlinear coupled equation; phase margin; unstable process; Automatic control; Couplings; Delay effects; Frequency; Nonlinear equations; Process design; Robust stability; Three-term control; Transfer functions; Tuning;
Conference_Titel :
Control and Automation (ICCA), 2010 8th IEEE International Conference on
Conference_Location :
Xiamen
Print_ISBN :
978-1-4244-5195-1
Electronic_ISBN :
1948-3449
DOI :
10.1109/ICCA.2010.5524358
