Stability of discrete systems controlled in the presence of intermittent sensor faults

  • Authors:
  • Rui Vilela Dionisio;Joäo M. Lemos

  • Affiliations:
  • Labo. de Instrumentação e Medida, Escola Sup. de Tecnologia de Setúbal, Insto. Politécnico de Setúbal and Insto. de Engenharia de Sistemas e Computadores-Investigaç&# ...;Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa, Portugal and Instituto de Engenharia de Sistemas e Computadores-Investigação e Desenvolvimento em Lisboa, Li ...

  • 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 presents sufficient conditions for stability of unstable discrete time invariant models, stabilized by state feedback, when interrupted observations due to intermittent sensor faults occur. It is shown that the closed-loop system with feedback through a reconstructed signal, when, at least, one of the sensors is unavailable, remains stable, provided that the intervals of unavailability satisfy a certain time bound, even in the presence of state vanishing perturbations. The result is first proved for linear systems and then extended to a class of Hammerstein systems.