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针对一类可重复使用飞行器的末端能量管理段制导问题进行研究.末端能量管理系统通过能量-待飞距剖面对飞行器实施制导,并对能量加以控制,引导飞行器到达安全的着陆窗口.采用基于系统线性化和退步设计原理生成纵向的高度控制系数和横向航迹的控制系数,并简化了制导律的设计参数,给出定常的PD控制系数.在完成标称轨迹离线规划的基础上,纵横向综合制导最终使飞行器满足着陆窗口的要求.通过对不同误差条件的仿真分析,显示了该方法对各种偏差摄动条件具有良好的鲁棒性.
Aiming at the problem of a terminal energy management section guidance for a reusable aircraft, the terminal energy management system directs the aircraft through the energy-to-flight distance profile and controls the energy to guide the aircraft to a safe landing window. Based on the system Linearization and regression design principle to generate vertical height control coefficient and transverse track control coefficient, and simplifies the design parameters of the guidance law to give a steady PD control coefficient.Based on the completion of the nominal trajectory offline planning, the vertical and horizontal The integrated guidance eventually makes the aircraft meet the requirements of the landing window.A simulation analysis of different error conditions shows that the proposed method has good robustness to various conditions of bias perturbation.