半周期中天法在初寻北中的应用研究  

Application Research of Semi-Period Transit Method on Coarse North-Seeking

作　　者：夏桂锁[1] 林明春[1] 林玉池[1] 黄银国[1] 刘红星[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点试验室,天津300072

出　　处：《传感技术学报》2007年第4期781-784,共4页Chinese Journal of Sensors and Actuators

基　　金：天津大学博士点基金项目资助(20030056017)

摘　　要：目前陀螺初寻北大多还是采用逆转点法,影响寻北速度且难以实现仪器自动化.由陀螺仪寻北中天法的基本原理出发,提出了一种固定照准部的初寻北半周期中天法.设计了如下初寻北方案:利用粗寻北传感器进入相对真北±1°的范围,再用半周期中天法进行初寻北测量.实验表明,半周期中天法应用于JT-15陀螺仪的初寻北精度可以达到±8′,而且初寻北效率提高了一倍.Reversal point method which is adopted by gyroscope to seek north at present reduces the speed of north-seeking and is hard to make the instrument automatic. Based on the principle of period transit method, semi-period transit method of collimation is proposed to improve the north-seeking speed and the automatic degree. In the north-seeking method, measuring precision deviating real north ±1°is obtained by coarse north-seeking sensor, then, the semi-period transit method is used to find coarse north. Experiments show that semi-period transit method is adopted in the coarse north-seeking of JT-15 gyroscope, ±8＇ north-seeking precision can be achieved and efficiency of coarse north-seeking is one time faster than period transit method.

关 键 词：陀螺 初寻北 中天法 半周期 曲线拟合 

分 类 号：V556.5[航空宇航科学与技术—人机与环境工程]