NDLI: Global output feedback stabilisation of a class of nonlinear systems with unstable zero dynamics

Content Provider	IEEE Xplore Digital Library
Author	Zhengtao Ding
Copyright Year	2010
Description	Author affiliation: Sch. of Electr. & Electron. Eng., Univ. of Manchester, Manchester, UK (Zhengtao Ding)
Abstract	This paper deals with output feedback stabilisation of a class of nonlinear systems with nonlinearity of the unmeasured state variables. The nonlinearity of the unmeasured state complicates the zero dynamics of the nonlinear system and makes the control design more difficult. In this paper, the zero dynamics analysed for the class of nonlinear systems with respect to the original output and then with respect to a virtual output. It is demonstrated that nonlinear systems with unstable zero dynamics may have stable zero dynamics with the virtual output. Based on the analysis, conditions are then identified for nonlinear systems which can be stabilised by control design with estimated state, including the estimated virtual output, and this removes a restriction of a recent result that requires the transformed system has no zero dynamics. Examples are included to demonstrate that the proposed control design can be used to stabilise nonlinear systems with unstable nonlinear zero dynamics.
Starting Page	4241
Ending Page	4246
File Size	676141
Page Count	6
File Format	PDF
ISBN	9781424474264
ISSN	07431619
e-ISBN	9781424474271
DOI	10.1109/ACC.2010.5530802
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Output feedback Nonlinear systems Nonlinear dynamical systems Control design State estimation Backstepping Control systems Observers Design methodology Automatic control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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