Robust H ∞ /μ fault diagnosis observer design

摘要: This paper presents a new approach to the design of robust observer-based fault detection scheme for diagnosing incipient faults, called H ∞ / μ observer (RFDO) which takes into account robustness against disturbances and sensitivity faults simultaneously. The has originated from estimator minimises effect disturbance on estimation error subsequently diagnostic residual. residual is maximised by proper selection performance bound weighting matrix estimator. Depending class uncertainty modelling considered, one or two Riccati equations are required design. can be designed against; only, parameter large variety errors. assumes block diagonal structure produce less conservative been applied third-order system example chosen demonstrate special features. results show that detect effectively even in presence