An approach to robust residual generation and evaluation

Problems of robust residual generation and evaluation are investigated with the aid of frequency-domain approaches and H/sub infinity /-optimization techniques. Based on the parameterization of achievable residual dynamics the robust residual generation is defined as an optimization problem that can be solved by H/sub infinity /-techniques. To increase the robustness of residual evaluation, a frequency-domain residual measure is introduced, under which fault thresholds are derived.<>