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设计了一种基于在线轨迹生成的空天飞行器末端能量管理段预测校正复合制导方法,解决了传统制导方法实现复杂,鲁棒性不够强的问题。首先,建立能量-高度/航程的走廊和特征剖面,将制导问题转化为高度控制和航程调节问题;然后,研究了捕获转弯航向角迭代搜索算法,在线完成地面航迹生成和航程预测;最后,基于在线生成的航迹和预测的航程,设计了减速板开启角度和飞行器高度对航程联合校正的复合制导策略。仿真结果表明:存在参数不确定性和初始状态偏差的情况下,该制导方法依然具有良好的鲁棒性和精度。
A composite guidance method based on on-line trajectory generation for end-of-space aircraft end-energy management segment prediction and correction was designed to solve the problem of complex and poor robustness of traditional guidance methods. Firstly, the corridor and characteristic sections of energy-altitude / range are established, and the guidance problem is transformed into altitude control and range adjustment. Secondly, the iterative search algorithm for capturing turning heading angle is researched to generate the ground track and the range prediction online. Finally, Based on the on-line flight path and the predicted flight range, a composite guidance strategy was proposed for the joint opening angle of the speedbrake and aircraft altitude correction. The simulation results show that the guidance method still has good robustness and accuracy in the presence of parameter uncertainty and initial state deviation.