Reliability monitoring of fault tolerant control systems with demonstration on an aircraft model

  • Authors:

  • Hongbin Li;Qing Zhao;Zhenyu Yang

  • Affiliations:

  • Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada;Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada;Department of Computer Science and Engineering, Aalborg University Esbjerg, Esbjerg, Denmark

  • Venue:
  • Journal of Control Science and Engineering - Robustness Issues in Fault Diagnosis and Fault Tolerant Control
  • Year:
  • 2008

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Abstract

This paper proposes a reliability monitoring scheme for active fault tolerant control systems using a stochastic modeling method. The reliability index is defined based on system dynamical responses and a safety region; the plant and controller are assumed to have a multiple regime model structure, and a semi-Markov model is built for reliability evaluation based on the safety behavior of each regime model estimated by using Monte Carlo simulation. Moreover, the history data of fault detection and isolation decisions is used to update its transition characteristics and reliability model. This method provides an up-to-date reliability index as demonstrated on an aircraft model.