面向中末交接班的临近空间拦截弹弹道优化

针对反高超声速目标拦截弹中末制导交接班窗口小、变化快引起的交接班难题，设计了带终端位置和速度指向约束的拦截弹中制导弹道。首先，考虑交接班时间、动压、热流、过载、控制量以及终端弹道倾角等约束,建立了拦截弹纵向平面中制导弹道优化模型；其次，构建了中制导段的弹目拦截几何，提出了能量受限的侧窗探测拦截弹中末制导交接班窗口概念，并将其作为拦截弹中制导段弹道设计的终端约束条件；然后，基于hp自适应网格细化方法设计了面向中末交接班的优化弹道。仿真结果表明，所构建的中末制导交接班窗口条件完备有效，能较好描述中制导末端约束条件，所设计的优化算法收敛速度快、求解精度高。另外，通过仿真提出了临近空间拦截弹宜采用背风探测的交接班方案。

Trajectory Optimization of Nearspace Interceptor with the Constraint ofMidcourse and Terminal Guidance Handover Window

In allusion to the midcourse and terminal guidance handover difficulties caused by small and fast changing handover window when against hypersonic targets, the midcourse guidance trajectory of interceptor with the constraint of terminal position and velocity direction is designed. Firstly, considering the constraints of handover time, dynamic pressure, heat flow, overload, control command and terminal trajectory inclination angle, the optimization model of midcourse guidance trajectory in longitudinal plane of interceptor is established. Secondly, planar engagement geometry in the longitudinal plane is built, and the concept of energy constrained side window detection interceptor midcourse and terminal guidance handover window is put forward, which is used as the terminal constraint condition of trajectory design. Then, the optimized trajectory with midcourse and terminal guidance handover constraint is designed based on hp adaptive mesh refinement method. The simulation results show that the midcourse and terminal guidance handover window is well constructed and can describe the guidance terminal constraints completely. In addition, a succession scheme of leeward detection is proposed through simulation.