Chuan-jiang WANG(王传江)， Xiu-juan SUN(孙秀娟)
College of Information & Electrical Engineering, Shandong Univers ity of Science and Technology, Qingdao 266510, China
Abstract-A discrete fuzzy sliding mode variable structure con troller was studied and designed for a class of electro-hydraulic servo system by means of the combination of sliding mode control theory and fuzzy control the ory. Designed based on the exponential reaching law, parameter ε of convent ional sliding mode controller is the key factor of system chattering, and is pro portional to it as well. In view of this, fuzzy control theory was introduced in to the design to ensure the real-time adjusting of parameter ε. Simulation results show that the system chattering is eliminated perfectly, and the dynami c performance of the control system is improved effectively.
Key words-sliding mode control; fuzzy control; reaching law; servo system
Manuscript Number: 1674-8042(2011)01-0081-03
dio: 10.3969/j.issn.1674-8042.2011.01.21
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