NDLI: An adaptive variable structure control for fast time-varying unknown plants

Content Provider	IEEE Xplore Digital Library
Author	Chiang-Ju Chien Li-Chen Fu
Copyright Year	1993
Description	Author affiliation: Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan (Chiang-Ju Chien; Li-Chen Fu)
Abstract	In this paper, a combination of adaptive control and variable structure control methodology is proposed to solve the general fast time-varying plants with totally unstructured parameters. We show that the control scheme will work only under the assumptions of known order, relative degree, high frequency gain sign and minimum-phase property. In contrast to the conventional approaches where the variable structure design is applied mainly to the adaptation of some traditional parameters /spl Theta/ by using the knowledge of unknown bounds on control parameters, a new adaptation scheme for control parameters incorporating the variable structure concept is given. Owing to this new scheme, we forsake the standard requirement of the upper bounds on some unknown parameters, which is frequently adopted in the field of robust linear MRAC using variable structure design. It is shown that without any persistent excitation, the tracking error will converge to zero in finite time for relative degree one plants and to a small residual set exponentially (whose size depends on a design parameter) for plants with any higher relative degree.<>
Starting Page	1428
Ending Page	1433
File Size	570894
Page Count	6
File Format	PDF
ISBN	0780312988
DOI	10.1109/CDC.1993.325424
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-12-15
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Programmable control Adaptive control Robust control Electric variables control Frequency Computer science Robustness Error correction Size control State feedback
Content Type	Text
Resource Type	Article

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