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任务目标的多样化要求亚轨道飞行器具备在线重构能力。根据飞行器当前飞行状态以及终端约束条件,使用勒让德伪谱法进行在线轨道重构,生成满足各种轨道约束的最优返回轨迹,并实时反馈更新当前轨道控制量迎角和倾斜角,达到实时最优闭环制导的目的。轨道重构的实时性可采用无量纲化、Bootstrap串行优化、弹性约束和自适应反馈更新等策略加以保证。仿真结果表明,在线轨道重构可以满足实时性要求,即使出现严重的阵风干扰,也能达到所要求的终端约束条件,并且制导指令不会出现增加控制难度的剧烈抖动现象。
The diversification of mission objectives requires that the suborbital aircraft possess online reconstruction capabilities. According to the current flying state of the aircraft and the terminal constraints, the Lehmann-Doppler spectrum reconstruction method is used to reconstruct the on-line trajectory and generate the optimal return trajectory that satisfies various trajectory constraints. The trajectory angle and tilt angle are updated and updated in real time, Real-time optimal closed-loop guidance purposes. Real-time orbit reconstruction can be non-dimensional, Bootstrap serial optimization, flexible constraints and adaptive feedback update and other strategies to be guaranteed. The simulation results show that the on-orbit reconstruction can meet the real-time requirements, and can meet the required terminal constraints even in the case of severe gust disturbance. And the guidance instructions will not appear the severe jitter that increases the control difficulty.