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基于高斯伪谱法,结合亚轨道飞行器返回段特点,从任务安全性的角度出发进行了返回轨迹优化研究。出于实际控制能力及安全性的考虑,采用伪控制量作为最优控制变量,摒弃了再入分段、末端区域能量管理段、航向校正圆锥等概念,引入“末端进场走廊”来描述性能指标及终端约束。仿真结果表明,在满足各种约束条件下,能够快速准确地生成亚轨道飞行器返回轨迹,同时验证了结果的可行性与最优性。
Based on the Gaussian pseudospectral method and the characteristics of the return trajectory of the suborbital aircraft, the research of return trajectory optimization is carried out from the aspect of mission safety. For the sake of practical control and safety, pseudo-control is adopted as the optimal control variable, and the concept of reentry segmentation, end-zone energy management segment and heading correction cone are introduced into “terminal approach corridor ” Describe performance indicators and terminal constraints. The simulation results show that the trajectory of the suborbital vehicle can be generated quickly and accurately under various constraints, and the feasibility and the optimality of the results are verified.