高超声速飞行器再入多段导引方法研究

针对通用航空飞行器(CAV)的再入飞行问题,研究了一种滑翔式再入飞行器的三自由度轨迹快速生成方法。该方法将再入轨迹分为初始下降段、过渡段和占大部分飞行时间的拟平衡滑翔段,引入拟平衡滑翔条件(QEGC),将过程约束转换成倾侧角制导律的上界。结合预测校正方法在线设计满足各种轨迹约束的倾侧角制导律,最后在计算机上进行制导仿真。仿真结果表明,该方法可快速地得到满足过程约束和目标要求的弹道。

A study on the multiple-phrase reentry guidance method of hypersonic vehicle

For the reentry of common aero vehicles(CAV),a rapid trajectory planning method for a long range hypersonic glide reentry vehicle is presented.The reentry trajectory is divided into three phases: initial descent phase,transition phase and quasi-equilibrium glide phase which takes most of the reentry period.By using the QEGC,the bank angle profile is modified so that it can satisfy all path constraints.With the predictor-corrector method combined,this method generates the basic reentry guidance law for CAV considering all path constraints.The results indicate that the method can quickly get the trajectory required by process constraints and target.