Mixed H₂/H_∞ approach to integrated fault diagnostic and fault-tolerant control

The integrated fault diagnostic and fault-tolerant control problem of uncertain linear system is researched. Considering the actuator and sensor faults, an integrated fault diagnostic and fault-tolerant controller and a linear matrix inequalities (LMI) approach are proposed. It is shown that a solution of this controller can be obtained from mixed H₂/H_∞ output-feedback control, which maintains the robust integrity of closed-loop systems with parameter uncertainties and faults by LMIs. At last, the simulation of applying in a satellite attitude control system with actuator and sensor faults validates that this solution is effective.