干涉式光纤陀螺系统Serrodyne调制误差分析  

Serrodyne Modulation Error Analysis of Interferometric Fiber Optic Gyro

作　　者：赵忠华[1] 张炎华[1] 徐力平[1] 

机构地区：[1]上海交通大学信息检测技术及仪器工程系

出　　处：《信号处理》2002年第2期159-162,共4页Journal of Signal Processing

基　　金：国防科技预研重点项目;基金项目号(9.2.6.②)

摘　　要：本文首先针对实现闭环光纤陀螺系统相位零化技术的Ｓｅｒｒｏｄｙｎｅ调制理论进行了详细分析，通过对实际Ｓｅｒｒｏｄｙｎｅ调制分析得出因回扫时间的延迟产生周期性反对称毛刺是导致调制失真的因素，运用 Ｆｏｕｒｉｅｒ Ａｎｇｉｅｒ Ｂｅｓｓｅｌ级数对误差信号各次谐波分解得出低次谐波分量在误差信号中占主导作用，并提出减小调制误差的方法。The serrodyne modulation theory which is used to null out Sagnac phase shift in closed-loop fiber optic gyro system was analyzed firstly. The periodic antisymmetrical spike like flyback error is the distrubance contribution from a real serrodyne. Using the Fourier Angier Bessel series for the expansion harmonic of the error waveform, the higher harmonic amplitudes decrease and the lower ones result in the error mainly. And a method to minimize the distortion was proposed.

关 键 词：干涉式光纤陀螺系统 Serrodyne调制 误差分析 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计]