滑翔再入飞行器横侧向耦合姿态控制策略

发布时间：2018-09-08 19:30

【摘要】：针对气动舵面仅为两片体襟翼的欠驱动构型可重复使用运载器(RLV)再入过程中的强耦合现象,提出一种基于此类布局飞行器耦合特性的横侧向控制策略。在分析惯性耦合、运动耦合和稳定性耦合的产生机理与规避方式的基础上,计算标称轨迹下的急滚稳定边界并将倾侧角指令速率限制在此边界内以稳定惯性耦合;针对现有的荷兰滚模态预测式不适用于此布局飞行器的问题推导出一种新的荷兰滚运动预判方法,并根据预判结果设计控制增益。最终得到低动压下体襟翼-反作用力控制系统(RCS)复合控制策略和高动压下体襟翼单独作用的横侧向耦合控制策略。六自由度(6-DOF)仿真结果表明该控制策略能很好地跟踪制导指令并且能最大限度利用气动舵面以减少RCS燃料的消耗。
[Abstract]:In view of the strong coupling phenomenon in the reentry process of an underactuated reusable launch vehicle with only two body flaps, a lateral control strategy based on the coupling characteristics of this type of aircraft is proposed. On the basis of analyzing the mechanism of inertial coupling, motion coupling and stability coupling, the stable boundary of rapid rolling under the nominal trajectory is calculated, and the inclination angle instruction rate is limited to the boundary to stabilize the inertial coupling. In order to solve the problem that the existing Dutch roll mode prediction formula is not suitable for this layout aircraft, a new Dutch roll motion prediction method is proposed, and the control gain is designed according to the prediction results. Finally, the combined control strategy of (RCS) for low dynamic pressure flaps and reaction force control system and the transverse and lateral coupling control strategy of body flaps acting alone under high dynamic pressure are obtained. The simulation results of six degrees of freedom (6-DOF) show that the control strategy can track the guidance instructions well and make maximum use of the pneumatic rudder surface to reduce the consumption of RCS fuel.
【作者单位】：北京航空航天大学宇航学院;
【基金】：国家自然科学基金(61174221;11272062)~~
【分类号】：V448.22

【共引文献】