实时中天寻北算法  

North Finding Algorithm Based on Real-Time Transmit Method

作　　者：林明春[1] 夏桂锁[1] 林玉池[1] 黄银国[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：《纳米技术与精密工程》2007年第4期315-318,共4页Nanotechnology and Precision Engineering

摘　　要：中天法是机械陀螺仪精密寻北中最常用的测量方法之一，但是传统中天法测量一般需要1-1．5个以上中天周期才能得到测量结果，严重影响到测量速度．文中介绍了中天法寻北理论，并根据陀螺仪运动规律，提出了实时中天法寻北测量方法．该方法不需要等到光标穿过零刻线，在任意位置时即可以开始寻北测量，从而可以最大程度地避免陀螺下放后因光标远离零刻线而占用的测量时间．实验结果表明，该方法在保证寻北测量精度的同时，可以有效缩短寻北测量时间，达到了快速寻北的目的．Transmit method is used to precise north finding in the system of mechanical gyroscope. The traditional transmit method needs over 1--1.5 transmit periods to complete the measurement, which seriously reduce the speed. North finding algorithm based on real-time transmit method was proposed on the basis of motion law of gyroscope in this paper. With the new algorithm, the north finding measurement can be started in any position that gyroscope＇ s cursor passes by rather than the balance position. It is proved through experiment that the measuring time is distinctly reduced and simultaneously the measurement precision can be ensured.

关 键 词：中天法 寻北 陀螺仪 平衡位置 

分 类 号：P204[天文地球—测绘科学与技术]