H∞ fault estimation and accommodation for LTI systems

This paper deals with the problem of active fault tolerant control for linear time invariant (LTI) systems with L₂ - norm bounded disturbances and potential additive fault. By incorporating some prior knowledge of fault into the design procedure, a new H_infin controller in the generalized internal model control architecture is presented to realize fault estimation and accommodation. An integration of observer-based H_infin fault estimator and a state feedback controller is considered, while a solution to the active fault tolerant control system can be obtained by designing the observer and controller gain matrices in terms of linear matrix inequality separately. Finally, a numerical example is given to demonstrate the effectiveness of the proposed method.internal model control architecturefault estimationstate feedback controllercontroller gain matriceslinear matrix inequality