A feasible two-stage LQ reliable control via partial actuator failures estimation

This paper introduces a feasible version of the previously proposed two-stage LQ reliable control (TSLQRC) in order to overcome the infeasible problem encountered in the control structure of the TSLQRC in which the controller has exactly known the faults in the preselected set of actuators. A modified unified gain margin constraint and a parameter estimating technique are proposed to facilitate the design. Analytical and simulated results show that the proposed feasible TSLQRC serves as a practical implementation of the TSLQRC.