基于仿真的探空火箭导航系统性能分析

摘要

为验证北斗导航定位系统与微机电系统(MEMS)在探空火箭定位中的性能,在建立某型号探空火箭动力学模型的基础上,根据北斗导航系统和捷联惯性导航系统(SINS)的基本原理,在STK和Matlab/Simulink上构建了北斗星座与MEMS联合仿真模型.分别完成了对探空火箭的北斗导航和捷联惯性导航,并引入卡尔曼滤波器完成了对探空火箭的SINS/北斗组合导航.结果表明,在所使用的硬件和算法的前提下,北斗导航以及组合导航的定位精度分别达到了3.78m与2.88m,可以满足探空火箭实际工程需要.%In order to verify the performance of the application of Beidou navigation system and MEMS on sounding rockets,the dynamic model of the sounding rocket is established,the Beidou/MEMS models are built with STK and Matlab/Simulink hybrid modeling approach according to the basic principle of Beidou system and MEMS.Beidou system and MEMS are used to locate the rocket respectively.Kalman filter is introduced to finish the SINS/Beidou integrated navigation.According to the results,in the context of hardware and software mentioned,the accuracy of Beidou navigation and integrated navigation is 3.78m and 2.88m separately.These features can satisfy the requirement of sounding rockets.