Robust autopilot design of high-speed reentry aircrafts

The autopilot design problem of a high-speed reentry aircraft is considered. The eigenstructure assignment approach based on the robust parameterized method is employed and feed forward compensators are designed based on the model reference theory to realize tracking of the overload signals. In order to simplify the autopilot system, a constant non-switching feedback controller, which stabilizes the system on the whole trajectory and doesn't vary with the rolling rate, is proposed. According to the specific features of the high-speed reentry aircraft, a simple and feasible control strategy is proposed. To validate the performance of the autopilot system, six degrees of freedom simulations are carried out. Particularly, the time delay behavior and saturation characteristic of the actuators are taken into consideration. The simulation results show the effectiveness of the method.