Research on Trajectory Maneuverability Control of Reentry Vehicle

In order to effectively control trajectory maneuverability motion of reentry vehicle,a new trajectory control law is presented.A mathematical model of trajectory combine control system is given.And with a view to uncertainty of trajectory control system for vehicle,a trajectory maneuverability control law of vehicle is designed based on variable structure control theory.After analyzing control surface and lateral thruster characteristic,control method of lateral thruster is designed to obtain equivalent effect of control law output.Lastly,combine control law of aerodynamics and lateral thrust is designed.Simulation results show that this control method can implement efficiently precise trajectory maneuverability of reentry vehicle as well as preferable robust stability.