高超声速滑翔飞行器滑翔段初始状态的唯一性和最优性分析

临近空间高超声速滑翔飞行器的弹道特性主要受滑翔段初始状态和飞行器控制律影响。在飞行器控制律确定的情况下,研究了滑翔段初始状态对高超声速滑翔飞行器弹道特性的影响规律。按照滑翔弹道的不同形式,在纵向平衡滑翔条件下,通过理论推导得出飞行器状态变量的解析式,结合平衡滑翔条件分析平衡滑翔弹道滑翔段初始状态的唯一性；在纵向跳跃滑翔条件下,构建弹道性能评价指标,利用群智能算法,寻找弹道性能最优时的滑翔段初始状态。利用单因素敏感性分析方法,分别对两种滑翔弹道的滑翔段初始状态进行敏感性分析,初始状态中初始速度对弹道特性的影响最大。对高超声速滑翔飞行器初始状态唯一性与最优性的分析,可为高超声速滑翔飞行器的弹道设计、弹道跟踪、轨迹预测和轨迹优化提供借鉴。

Analysis of uniqueness and optimality of glide segment initial state for hypersonic glide vehicle

The trajectory characteristics of the near-space hypersonic glide vehicle are mainly under the influence of the initial state of glide segment and control law of the vehicle. Therefore, the influence of glide segment initial state on trajectory characteristics of hypersonic glide vehicle was studied under the condition that the control law of vehicle is determined. According to the different forms of glide trajectory, under the condition of longitudinal equilibrium glide, the analytical formula of the vehicle state variable was derived theoretically, and the uniqueness of initial state of the equilibrium glide trajectory was analyzed in combination with the equilibrium glide condition. Under the condition of longitudinal skip glide, the evaluation indices of trajectory performance were constructed, and the initial state of glide segment with optimal trajectory performance was found by using the group intelligence algorithm. Through the single factor sensitivity analysis, the sensitivity analysis of the initial states of two forms of glide trajectory was carried out, and the initial velocity of initial state has the greatest influence on the trajectory characteristics. The analysis of the uniqueness and optimality of initial state can be used for reference in the trajectory design, trajectory tracking, trajectory prediction and trajectory optimization of hypersonic glide vehicle.