Decentralized observer-based tracker for analog systems with saturating actuator and state constraints

  • Authors:

  • J. S. H. Tsai;J. H. Lin;L. S. Shieh;C. R. Liu;S. M. Guo

  • Affiliations:

  • Control System Laboratory, Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan, ROC;Control System Laboratory, Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan, ROC;Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204-4005, USA;Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204-4005, USA;Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan 701, Taiwan, ROC

  • Venue:
  • Computers & Mathematics with Applications
  • Year:
  • 2008

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Abstract

A weighted switching strategy and an inner-loop compensator are presented in this paper to design an observer-based tracker for a decentralized closed-loop cascaded system with a saturating actuator and state constraints. The LQR design methodology for the observer-based tracker is proposed to simplify the complexity of the decentralized control. The realizable sample-data controller with a low-gain property and a high design performance is realized through the digital redesign method. For obtaining a better design performance, evolutionary programming is then presented to tune the parameters of the tracker. Some examples are also presented to demonstrate the effectiveness of the proposed methodology.