基于虚拟目标导引的再入飞行器禁飞区规避制导方法研究

Evasion guidance of re-entry vehicle satisfying no-fly zone constraints based on virtual goals

针对飞行器再入过程中面临的禁飞区规避问题,提出了一种基于虚拟目标导引的规避制导方法.该制导方法在对飞行器机动转弯能力分析的基础上,结合Dubins曲线路径规划方法与比例导引方法实时跟踪虚拟目标,实现飞行器对禁飞区的规避制导.为修正规避引起的误差、满足再入终端约束,通过建立基于能量的运动模型,结合平衡滑翔条件,进行航程及高度的解析预测-校正控制.仿真结果表明,该制导方法能够有效实现飞行器的禁飞区规避,且满足再入过程与终端约束,具有较强的适应性及鲁棒性.

An evasion guidance method based on virtual goals is proposed for re-entry vehicles to avoid a no-fly zone.The guidance method combined with the Dubins curve path planning method and proportion guidance can effectively avoid the no-fly zone based on the maneuverability analysis of the re-entry vehicle.This method designed an energy-based motion model combined with the Quasi equilibrium glide conditions,enabling the prediction-correction guidance to correct the errors caused by evasion and meet the altitude as well as voyage constraints.The simulation shows that the evasion guidance method can effectively avoid the no-fly zone,meet the re-entry terminal constraints,and the algorithm is robust and adaptable.