光纤陀螺惯性测量单元的设计与实现

Design and Implementation of IMU Based on FOGs

本文介绍采用全数字闭环光纤陀螺组成的惯性测量单元的实现方法，采用ＤＳＰ作为中央处理单元，完成三轴组合的时序控制、数字解调、滤波算法、波形合成及数据传输，并对三轴陀螺进行了全面的性能测试，测试结果表明惯性测量单元中每个陀螺零漂均小于０．５°／ｈ，标度因数线性度＜２００ｐｐｍ。

This paper describes an implenentation method of Inertial Measurement Units(IMU) using alldigital Fiber Optic Cyroscopes(FOG).The timing control,digital demodulation,filter algorithms,waveform combinataon and data communication for the threeaxis integrated FOG are carried out by a digital signal processor(DSP).The test result of three FOGs is presented.The performance of <0.5°/h bias stability,<200ppm scale factor accuracy is achieved,and the system satisfies the design requirements.