吸气式空天飞行器闭环上升制导研究

Closed-loop ascent guidance of air-breathing aerospace vehicle

闭环上升制导是吸气式空天飞行器达到快速优化、实时规划以及自主制导的必然要求。采用GHAME吸气式空天飞行器作为研究对象,提出了闭环上升制导最优控制方案,重点论证了该方案不存在关于节流阀值的奇异问题,并阐述了最优推力控制的Bang-Bang控制。引入有限差分法求解两点边值问题,并通过终端时刻调节算法求解终端时刻自由问题。仿真结果表明,所提出的闭环制导算法是有效、可行的,具有显著的优越性。

Closed-loop ascent guidance of the air-breathing aerospace vehicle arises from the requests of rapid optimization,real-time planning and autonomous guidance.This article presents an optimal solution for this problem,taking the GHAME air-breathing aerospace vehicle as a research object.Arguments that there is no singular problem and the thrust follows bang-bang control are given.The finite difference method is introduced to solve two-point boundary value problem,and a final time adjusting algorithm is developed.The simulation result shows that closed-loop algorithms are feasible and efficient,with remarkable advantages.