Lateral-directional Attitude Under-actuated Control Strategy of Hypersonic Vehicle

Research on lateral-directional attitude under-actuated control of the hypersonic vehicle with only the aileron, a new lateral-directional control strategy based on the idea of cascade was proposed, that can realize the roll angle control and guarantee the stabilization of the sideslip angle. Using the linear lateral-directional dynamic equations, the under-actuated control mechanism was analyzed. The rudder could produce sideslip angle, and the roll angle could be controlled by sideslip angle. With the concept of cascade control, a controller of two levels was designed that was series connection of the roll angle controller and sideslip angle controller. Results show that the design of the lateral-directional cascade control strategy can stabilize the system and the tacking performance of the roll angle satisfies the requirement.