高超声速滑翔飞行器解析协同再入制导

Analytical Cooperative Reentry Guidance for Hypersonic Glide Vehicles

为实现多高超声速滑翔飞行器的协同再入,提出一种基于剩余飞行时间和剩余飞行距离估计解析解的协同再入制导方法。基于准平衡滑翔条件推导了滑翔段剩余飞行时间和剩余飞行距离估计的解析表达式;通过攻角指令设计使飞行器快速进入并保持准平衡滑翔飞行,为时间协同提供有利条件;将纵向升阻比作为设计量,利用数值算法进行预测校正,结合航向角误差走廊得到倾侧角指令,实现了时间约束下的再入制导。基于此,设计了多飞行器协同再入策略,最终实现多飞行器绝对时间约束下的协同再入制导飞行。分别在标称条件和不确定条件下进行仿真,结果表明本研究提出方法具备一定的时间调节能力和对干扰的鲁棒性。

In order to realize the cooperative reentry of multiple hypersonic gliding vehicles,a cooperative reentry guidance method based on the analytical solution of time-to-go and range-to-go estimation is proposed.Based on the quasiequilibrium gliding condition(QEGC),the analytical expressions for the estimation of time-to-go and range-to-go during the gliding phase are derived.The design of the angle of attack command ensures that the aircraft enters quickly and maintains QEGC,which provides favorable conditions for time coordination.Taking the longitudinal lift-drag ratio as a design variable,numerical algorithms are used for prediction and correction.The bank angle command is obtained by using the azimuth error corridor,and the reentry guidance under the time constraint is realized.Based on the designed cooperative reentry strategy,the cooperative reentry guided flight under the absolute time constraint of multiple aircraft is realized.Simulations are carried out under nominal conditions and under uncertain conditions,respectively.The results show that the method proposed in this study has certain time adjustment ability and robustness to disturbances.