Fault detection via parameter robust estimation

We derive and analyze a fault detection filter which is robust to model uncertainty. To do this, we recast the fault detection problem as a disturbance attenuation problem and then incorporate parameter variations as an additional disturbance. The corresponding solution is a parameter robust game theoretic fault detection filter. A second look at our results, however, shows that the parameter robust estimation problem is equivalent to the measurement feedback H^∞ control problem and that the parameter robust filter cannot converge asymptotically to a classic detection filter structure