再入航天器轨迹机动控制研究

为了有效控制再人航天器的轨迹机动运动，提出了一个新的轨迹控制方法，首先建立了轨迹复合控制系统的数学模型，其次针对航天器轨迹控制系统的不确定性，基于变结构控制理论设计了轨迹机动控制律，在分析气动操纵面和侧向推力器输出特性的基础上，设计了推力器的控制方法，以获得与控制律输出量相同的控制效果，最后设计了气动力与侧向推力的复合控制规律。仿真结果表明，该控制方法能够有效地实现再入航天器的精确轨迹机动，且具有较强的鲁棒稳定性。

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.