Abstract
An observer based failure detection filter is introduced, where actuator/sensor failures are modeled as a disturbance. A sufficient condition for designing the filter and explicit formulas of the filter gains are presented. Then, the filter design is applied to active mass dampers (AMDs), where AMD actuator failures are considered. It is shown that the AMD model obtained by system identification satisfies the condition for designing the fault detection filters each of which utilizes either position of the AMD weights or acceleration of the floors. The failure detection ability of the filters is also demonstrated through experiments.
