Global control of nonlinear systems with uncertain output function using homogeneous domination approach |
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Authors: | Junyong Zhai Chunjiang Qian |
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Affiliation: | 1. School of Automation, Southeast University, , Jiangsu, 210096 China;2. Department of Electrical and Computer Engineering, The University of Texas at San Antonio, , San Antonio, TX, 78249 USA |
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Abstract: | This paper addresses the problem of using output feedback to globally control a class of nonlinear systems whose output functions are not precisely known. First, for the nominal linear system, we design a homogeneous state compensator without requiring precise information of the output function, and construct a nonlinear stabilizer with adjustable coefficients by using the generalized adding a power integrator technique. Then based on the homogeneous domination approach, a scaling gain is introduced into the proposed output feedback controller, which can be used by tuning the scaling gain to solve: (i) the problem of global output feedback stabilization for a class of upper‐triangular systems; and (ii) the problem of global practical output tracking for a class of lower‐triangular systems. Copyright © 2011 John Wiley & Sons, Ltd. |
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Keywords: | output feedback nonlinear systems homogeneous systems |
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