高超声速滑翔飞行器三维自主再入制导方法

Three-Dimensional Autonomous Reentry Guidance for Hypersonic Glide Vehicle

在严苛的热流、动压、过载等约束下,为了使高超声速滑翔飞行器在无动力再入过程中经过预先设定的航路点最终到达末端能量管理界面,提出一种基于轨迹在线生成加跟踪制导思路的三维自主再入制导方法。将再入轨迹分为初始下降段和滑翔段。初始下降段采用定常迎角和倾斜角策略。滑翔段轨迹在线生成分解为纵向规划和侧向规划:纵向规划中用于确定航程的阻力加速度-能量剖面由再入走廊上边界和下边界内插得到,侧向规划采用降阶的侧向运动方程根据航路点约束确定倾侧角反转的时刻。最后对该制导方法进行了仿真分析,仿真结果表明该制导方法能够在满足各种路径和终端约束要求下完成制导任务。

A novel three-dimensional autonomous reentry guidance method satisfying heat flux, overload, dynamic pressure, waypoints and other path and terminal constraints is proposed. The reentry trajectory is divided into the initial and glide phases. In the initial phase, a nominal angle of attack and a constant bank angle are used to generate the trajectory. And the glide phase is designed based on drag acceleration versus energy profile which is obtained by using the interpolation between the upper boundary and the lower boundary of the reentry corridor. The magnitude of the bank angle can be decided through the profile, and the sign of bank angle is determined by lateral planner satisfying the waypoints constraints. Simulation results show that the proposed reentry guidance method can generate trajectories satisfying path and terminal constraints.