Robust Analysis and Design for Discrete-Time Nonlinear Systems Subject to Actuator Saturation via Fuzzy Control

Sanghyung LEE
Euntai KIM
Hagbae KIM
Mignon PARK

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E88-A    No.8    pp.2181-2191
Publication Date: 2005/08/01
Online ISSN: 
DOI: 10.1093/ietfec/e88-a.8.2181
Print ISSN: 0916-8508
Type of Manuscript: PAPER
Category: Systems and Control
actuator saturation,  LMI,  fuzzy Kronecker delta,  discrete-time,  

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This paper proposes an analysis and design methodology for the robust control of affine-in-control nonlinear systems subject to actuator saturation in discrete-time formulation. The robust stability condition is derived for the closed-loop system by the introduction of the fuzzy Kronecker delta. Based on the newly acquired stability condition, a design method is proposed to guarantee the robust H performance. In the design, LMI-based pole placement is employed to use the freedom allowed in the selection of the controller. The validity of the proposed method is asserted by the computer simulation.

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