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A dynamic output feedback controllers for mismatched uncertain variable structure systems

โœ Scribed by Kuo-Kai Shyu; Yao-Wen Tsai; Chiu-Keng Lai

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
88 KB
Volume
37
Category
Article
ISSN
0005-1098

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โœฆ Synopsis

This paper proposes a dynamic output feedback controllers for variable structure systems. It is based on the concept of output feedback controllers, introduced by Z ak and Hui (IEEE Trans. Automat. Control AC-38 (1993) 1509) and Kwan (IEEE Trans. Automat. Control AC-41 (1996) 1691) for matched uncertain variable structure systems in which the state is unavailable and no estimated state is required. In this paper, we extend this idea to a class of mismatched uncertain variable structure systems. A modi"ed variable structure controllers is derived to guarantee the existence of the sliding mode by using output feedback only. The stability of the equivalent reduced-order system in the sliding mode is assured under certain conditions.

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For MIMO mechanical systems using position measurements only, this paper presents a dynamic output feedback sliding mode control algorithm in which an additional dynamics is introduced into the design of the sliding surface. Although the system has the mismatched uncertainty and external disturbance