高精度光纤陀螺振动误差抑制技术  

Vibration error restrain technology for high-precision fiber optic gyroscope

作　　者：舒建涛[1,2] 李绪友[1] 吴磊[1] 季旭东[2] 

机构地区：[1]哈尔滨工程大学自动化学院 [2]中国人民解放军91550部队

出　　处：《红外与激光工程》2011年第11期2201-2206,共6页Infrared and Laser Engineering

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

摘　　要：随着光纤陀螺的实用化,载体振动会使高精度光纤陀螺产生测量误差并使噪声增大,对光纤陀螺的性能指标造成不可忽视的影响。为了抑制光纤陀螺的振动误差,提高光纤陀螺的稳定性,对干涉式数字闭环光纤陀螺,从振动对光源和光纤环的影响机理出发,分析了振动影响下光纤陀螺干涉信号的表现形式,并针对此提出了抑制光纤陀螺输出信号噪声和消除陀螺漂移的原理,改进了信号解调方案,并以四状态调制方案为例进行了实验验证。实验结果表明,该方案降低了光纤陀螺输出信号的噪声,消除了由振动引起的陀螺漂移。证明了该方案对光纤陀螺振动误差抑制的有效性。With the practicalities of fiber optic gyroscope （FOG）, it is found that carders vibration will cause measurement error and make the signal noise increases, so the performance index of the FOG caused by vibration can not be ignored, especially for high-precision FOG. In order to suppress the vibration error and improve the stability of FOG, for the interferometric digital signal processing closed- loop FOG, from the mechanism of the impact on the light source and fiber coil which caused by vibration, the signal form of the FOG which under the influence of vibration was analyzed, a principle that could inhibit the FOG output signal noise and the eliminate the gyroscope drift was proposed, the signal demodulation program was improved, and the experiments based on four-state modulation were executed. Experimental results show that the program reduces the FOG output signal noise, and eliminates the gyroscope drift. It is proved that the program can effectively restrain the error and noise caused by the environment vibration.

关 键 词：光纤陀螺 振动误差 四状态调制 信号处理 

分 类 号：U666.1[交通运输工程—船舶及航道工程]