动能拦截器姿控固体小火箭点火算法设计

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。

Ignition Algorithm for Kinetic Interceptor Attitude Control Using Solid-Propellant Nozzles

Using solid-propellant nozzles is one of the best schemes for attitude control with a fast response and high precision. A mixed searching algorithm for ignition combination is presented for a novel configuration of attitude control solid-propellant nozzles on the kinetic interceptor. Firstly, the configuration of solid-propellant nozzles is described, and spin requirements of the kinetic interceptor is analyzed. Then the mixed searching algorithm is designed by a combination of sorting method and region search method. Sorting method is selected when the number of nozzles available is small and region search method is chosen on the contrary. Finally, Simulations using the algorithm for torque approximation and application in attitude control are conducted. Simulation results suggest that the algorithm can track the reference torque effectively and achieve attitude tracking quickly and with a high precision.