Minimum eigenvalue based adaptive fault compensation for hypersonic vehicles

The attitude tracking control problem is addressed for hypersonic vehicles under actuator faults that may cause an uncertain time-varying control gain matrix. An adaptive compen-sation scheme is developed to ensure system stability and asymptotic tracking properties,including a kinematic control sig-nal and a dynamic control signal. To deal with the uncertainties of the control gain matrix,a new positive definite one is con-structed. The minimum eigenvalue of such a new control gain matrix is estimated. Simulation results of application to an X-33 vehicle model verify the effectiveness of the proposed minimum eigenvalue based adaptive fault compensation scheme.