多位置寻北误差与陀螺数据采样时间的关系  

Relation between north seeking error of multi-position gyroscope north seeker and sampling time

作　　者：王立冬[1] 刘军[1] 鲁军[1] 

机构地区：[1]军械工程学院光学与电子工程系,石家庄050003

出　　处：《中国惯性技术学报》2011年第3期286-289,共4页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金项目(60671045)

摘　　要：为了在规定寻北时间内确定最佳采样时间和提高寻北精度,针对多位置陀螺寻北仪寻北误差与采样时间的关系问题,以FOG二位置寻北方案为例,采用FOG寻北误差理论推导结果与寻北实验结果相比较的方法,结合FOG数据的自相关性理论分析结果,分析得到了多位置寻北误差随采样时间的变化规律:随采样时间的增加,寻北结果会产生寻北精度不稳定、基本稳定、寻北精度较高和寻北误差增大等四种情况;分析了寻北实验误差小于理论计算结果以及寻北精度并非一直随采样时间增加而提高的原因;提出采样时间极限的概念,并得到实验样机采样时间极限为120 s;提出确定采样时间的原则和选择最佳采样时间的方法,这对多位置陀螺寻北仪设计和提高寻北精度具有一定指导意义。In order to ascertain the best sampling time and improve north-seeking precision（NSP） in given time for multi-position gyroscope north seeker（MPGNS）,the relation between the north seeking error of MPGNS and the sampling time is studied.The academic error of FOG north-seeking is compared with the north-seeking experiment result for the two-position FOG north seeker,and the self-relativity of FOG＇s static data is analyzed in theory,by which the law that the north seeking error of MPGNS changes with the sampling time is gained,that is,there are four north seeking results when the sampling time is increased： NSP is lower,NSP is stable,NSP is higher,and the north-seeking error increases.The reasons why the north-seeking experimental error is lower than the academic result and NSP is not always improved with the increase of sampling time are analyzed.The concept of sampling time limit is put forward,and the sampling time limit of prototype is 120 s.Rules and the method of selecting the best sampling time are put forward,which could guide the design of MPGNS and improve the north-seeking precision.

关 键 词：多位置陀螺寻北仪 寻北误差 采样时间 采样时间极限 

分 类 号：U666.1[交通运输工程—船舶及航道工程]