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Fault detection for time-delay systems by data reconciliation

In this paper, a method is proposed to detect and localize sensor or actuator failures in time-delay systems. This method is based on analytical redundancy and uses a simultaneous state and input estimation. Using the method on the concept of standardized least square residuals, residuals can be generated in a number of ways and a corresponding design of fault detection and isolation scheme can be presented. Finally, the applicability of the proposed scheme is illustrated on a numerical example.