Integrated design method for manipulability and control law of hypersonic vehicle

The main flight phases of a hypersonic vehicle include propulsion-assisted separation phase, cruise phase and descent phase. In the separation phase, the task of control surface is to suppress the separation perturbation of the hypersonic vehicle quickly, but in the cruise phase, the task is to achieve the high-precision control of its attitude. During these two phases, the requirements for the manipulability of the rudder surface are rather different. To satisfy the control requirements, this paper explores the control surface dimension optimization and design method, namely the manipulability and control law integrated design method. It uses the optimal control method to optimize the gains of the autopilot of the hypersonic vehicle and then optimizes the boundary dimensions of its optimal rudder surface and its control law with the parallel subspace optimization method of the multi-objective genetic algorithm. The simulation results show that, during the separation phase, he optimal rudder surface can quickly suppress the influence of separation perturbation on the attitude of the hypersonic vehicle and quickly adjust its attitude to the engine ignition window and that, during the cruise phase, the optimal rudder surface can quickly suppress the influence of gust interference on the attitude and thus stabilize it. This exploration sheds light on a hypersonic vehicle's manipulability design.