验证石英加速度计误差模型的火箭橇试验  

Verifying QFPA's error model based on rocket sled testing

作　　者：陈东生[1] 魏宗康[1] 房建成[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100854

出　　处：《中国惯性技术学报》2009年第2期236-239,245,共5页Journal of Chinese Inertial Technology

基　　金：国防基础科研项目(B0320080021)

摘　　要：火箭橇试验具有产生大过载、高速度、强振动和冲击等综合条件的能力,可以在综合环境条件下对惯性测量装置的误差模型进行验证。文中主要针对高精度捷联系统中的石英加速度计,利用3Km火箭橇轨道,根据误差模型的特点以及误差系数的可观性设计了过载曲线和安装方式。分析了雷达测速不能满足外测精度的要求,对遮光板测速精度和定位精度分别进行了分析。遮光板测速对布点之间的最小距离有严格的限制,而定位的优点是对最小距离没有要求。从仿真结果来看,在外测采用遮光板时,测距精度对石英加速度计的误差系数分离置信度大于测速精度。因此,利用火箭橇试验验证石英加速度计误差模型时,应该采用遮光板的位置信息,遮光板的布点之间距离应尽可能小。Sled testing can produce large acceleration, high velocity and strong vibration, so sled testing can test the error model of IMU. According to the length of sled track with three kilometers, a method to design the sled acceleration and to confirm the mounting way of SIMU is studied in this paper, which can verify the QFPA＇s error model. The precision of Radar velocity measurement can not meet the requirement of testing, so velocity and position precision are analyzed. The minimum space between two optical units is needed in velocity measurement, but not in positioning. The simulation shows that the coefficients with observed velocity are more reliable than the coefficients with position. In a word, the position of optical units should be used to verify the QFPA＇s error model, and the space between two optical adjacent units should be small as possible.

关 键 词：捷联惯性测量装置 火箭橇试验 石英加速度计 误差模型 

分 类 号：U666.1[交通运输工程—船舶及航道工程]