高精度数字闭环光纤陀螺的调制增益控制  

Modulation gain control of high-precision digital closed-loop fiber optic gyroscopes

作　　者：张勇[1] 李绪友[1] 王南 王瑞[1] 

机构地区：[1]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001 [2]海军驻杭州地区军代表室,浙江杭州310012

出　　处：《哈尔滨工程大学学报》2008年第11期1172-1175,共4页Journal of Harbin Engineering University

基　　金：国防科学技术工业委员会基础研究基金资助项目(514010502HT0135)

摘　　要：高精度光纤陀螺广泛采用数字闭环处理的方案,因此闭环增益控制的误差将会影响到陀螺性能.从光纤陀螺的信号处理原理出发,分析了光纤陀螺的关键器件Y波导的半波电压波动对陀螺精度的影响,并针对此提出了光纤陀螺调制增益控制的原理.根据该原理,设计了基于四态调制的双闭环数字信号处理方案,用来对调制增益漂移进行实时跟踪和补偿.实验结果表明,该方案提高了陀螺的零偏稳定性以及标度因数线性度,改善了陀螺性能.Since digital closed-loop control is extensively used in high-precision fiber optic gyroscopes （FOG）, the errors from the closed-loop gain control will certainly, affect the performance of the gyroscope. Starting from the working principle of signal processing of high-precision digital closed-loop fiber optic gyroscopes, the influence of fluctuation caused by half-wave voltage of Y waveguide-a key device in FOG-on the accuracy of gyroscopes was in- vestigated, and the modulation gain control theory of FOG was developed. On that basis, double closed-loop digital signal processing method based on four-state modulation was proposed to track and compensate modulation gain drift. Experimental results showed that the method increases the bias stability and scale factor linearity of FOG, and also improves its performance.

关 键 词：信号处理 Y波导 调制增益 第二闭环回路 四态调制 

分 类 号：U666.1[交通运输工程—船舶及航道工程]