动能拦截器姿控固体小火箭点火算法设计

Ignition algorithm for attitude control solid-propellant nozzles in kinetic interceptor

使用固体姿控小火箭是实现动能拦截器快响应和高精度姿态控制的最佳方案之一。针对一种新型动能拦截器姿控小火箭布局,提出了点火组合混合搜索算法。描述了动能拦截器姿控小火箭的配置方案,分析了弹体自旋需求。设计了一种结合目标排序法和区间搜索法的点火组合混合搜索算法:当可用小火箭个数较少时,采用目标排序法;当可用小火箭个数较多时,采用区间搜索法。指令力矩近似仿真结果及姿态控制数值仿真结果表明:该算法能够有效地近似指令力矩,实现快速高精度的姿态跟踪。

Using solid-propellant nozzles is one of the best schemes for kinetic interceptor to realize the fast response and high precision of attitude control. A mixed searching algorithm for ignition combination was presented for a novel attitude control solid-propellant nozzle in kinetic interceptor. Firstly,the configuration of solid-propellant nozzles was described and spin requirements of the kinetic interceptor were analyzed. Then the mixed searching algorithm was designed by a combination of sorting method and interval searching method. Sorting method is selected when the number of available nozzles is small and interval searching method is chosen on the contrary. Results of instruction torque approximation simulation and attitude control numerical simulation suggest that the algorithm can track the instruction torque effectively and achieve attitude tracking quickly and with a high precision.