Lateral-Direction Control via Reaction Control System

This paper presents the design of lateral/directional control with RCS on reentry of Reusable Launch Vehicle. Thecontrol law are designed, with great computational advantage,for a linear system and then applied in a nonlinear way with on-off type RCS. The lateral/directional control concept essentially reverses the traditional role of the lateral force effectors. The feedback of roll rate to aileron is used to damping the Dutch roll while the yaw jets is used to damping roll mode and maintaining the roll attitude. And a revised PWM is developed based on principle of equivalent accumulated impulse. The final simulation result shows the validity of this method.