Robust Residual Generation Via Lmi

摘要

This paper presents a new approach that attempts to optimise two contradictory objectives:rndisturbance attenuation and fault sensitivity. The proposed method is applied to linear time-invariantrnsystems subjected to unstructured perturbations and critical faults that involve a frequency change.rnThis approach is based on H2 estimation which allows optimising the attenuation of the worst-caserneffects of disturbances on the residual. To enhance the sensitivity of this residual to faults, arnparametrisation of the initial observer is proposed. This parametrisation intends to improve thernamplification of critical faults on residual with regard to disturbances attenuation.