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A Quantitative Performance Index for an Input Observer (II) - Analysis in Steady-State -

입력관측기의 정량적 성능지표 (II) -정상상태 해석-

  • 정종철 (한양대학교 대학원 정밀기계공학과) ;
  • 이범석 (삼성테크원㈜) ;
  • 허건수 (한양대학교 기계공학부)
  • Published : 2002.10.01

Abstract

The closed-loop state and input observer is a pole-placement type observer and estimates unknown state and input variables simultaneously. Pole-placement type observers may have poor performances with respect to modeling error and sensing bias error. The effects of these ill-conditioning factors must be minimized for the robust performance in designing observers. In this paper, the steady-state performance of the closed-loop state and input observer is investigated quantitatively and is represented as the estimation error bounds. The performance indices are selected from these error bounds and are related to the robustness with respect to modeling errors and sensing bias. By considering both transient and steady-state performance, the main performance index is determined as the condition number of the eigenvector matrix based on $L_2$-norm.

Keywords

CSIO(Closed-loop State and Input Observer);Condition Number;Performance Index;Robustness;Steady-State;Norm

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