Design of a Perturbation Estimator Using the Theory of Variable-Structure Systems and Its Application to Magnetic Levitation Systems

Yu Sheng Lu, Jian Shiang Chen

研究成果: 雜誌貢獻期刊論文同行評審

48 引文 斯高帕斯(Scopus)

摘要

A perturbation estimator using the theory of variable-structure systems is proposed to enhance the robustness of a pole-placement controller design. In its ideal form, the pole-placement design using feedback-linearization technique achieves a desired performance in nonlinear time-varying systems. However, its performance deteriorates rapidly with the presence of disturbance and parametric uncertainties, referred to as perturbation. The estimate generated by the proposed perturbation estimator is incorporated as an additional input to rectify the uncertainties in the nominal control model of the pole-placement design. The proposed scheme requires neither the measurement of the time derivative of the state vector nor the precise knowledge of system parameters, but rather the bounds on system perturbation. Chatter and the adverse effects of conservative bounds on system perturbation, often encountered in conventional sliding-mode control (SMC), are alleviated for the controlled plant by the proposed scheme. The benefits of this scheme are demonstrated in this study practically on a magnetic levitation system and its performance is compared with that of the conventional SMC scheme.

原文英語
頁(從 - 到)281-289
頁數9
期刊IEEE Transactions on Industrial Electronics
42
發行號3
DOIs
出版狀態已發佈 - 1995 6月
對外發佈

ASJC Scopus subject areas

  • 控制與系統工程
  • 電氣與電子工程

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