空中对准方案的误差分配分析方法(英文)  

Analysis method on error distributions of in-flight alignment schemes

作　　者：翁浚[1] 秦永元[1] 严恭敏[1] 梅春波[1] 

机构地区：[1]西北工业大学自动化学院,西安710129

出　　处：《中国惯性技术学报》2015年第5期570-574,共5页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金资助(61273333)

摘　　要：舰载机进行紧急作战任务时,可能会先快速起飞,然后再进行空中对准。为了保证对准结束进入惯性导航模式后,惯导系统能够达到一定精度指标,对准结束时刻的姿态信息需要达到一定的精度要求。空中对准过程一般可分为粗对准和精对准两部分,对准结束时刻的姿态精度由粗对准结束时刻的导航误差、惯性器件误差、重力场模型误差和对准过程中的飞行机动等多个因素决定。首先利用设计的协方差分析方法,对两种不同空中对准方案进行误差分配,并通过Monte-Carlo仿真技术对误差分配结果进行了验证。仿真结果说明了提出的误差分析方法是正确的,为空中对准方案的改进方向提供了借鉴作用。When carrier aircrafts have emergency combat tasks,they may quickly take off first,and then do the in-flight alignment. In order to guarantee the inertial navigation system reaching a certain precision index when entering navigation mode after the alignment process,the attitude information at the end of the alignment needs to meet a certain accuracy requirement. The in-flight alignment process normally can be divided into two parts： coarse alignment and precise alignment. The attitude precision at the end of the precise alignment is determined by coarse alignment,inertial measurement unit error,gravity field model error and in-flight maneuver through alignment process,etc. Firstly,a covariance analyzing method is designed and used to get error distributions of two different alignment schemes. Then,Monte-Carlo simulation technique is used to testify the accuracy of error distribution results. Simulation results show that the proposed analysis method is correct,which can provide reference for improving in-flight alignment schemes.

关 键 词：空中对准 误差分配 协方差分析 蒙特卡洛仿真 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]