Robust fault diagnosis in time-delay systems

The problem of constructing robust (with respect to the uncontrolled disturbances) diagnostic tools for nonlinear time-invariant discrete systems with a single delay is considered. The solution is based on the logic-dynamic approach, which allows one to solve the problem of diagnosis in nonlinear systems by linear methods without sacrificing the solution quality. The robustness of the diagnostic procedure is achieved by combining the optimization approach and averaging the residual signal over time.