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当光纤陀螺的输入角速率较小时,其测量误差比较大,很难满足卫星等对测量精度要求较高的应用领域要求。文中主要从闭环反馈主回路探测器误差分析开始,分别从电子串扰、Y波导的非线性及D/A转换器的非线性等几方面,论述了在小角速率输入的情况下,分别对光纤陀螺标度因数非线性的影响,并且给出了改善的方法。试验结果显示,采取相应措施后,光纤陀螺的标度因数线性度有明显的提高。
When the input angular rate of fiber optic gyroscope is small, the measurement error is relatively large, so it is difficult to meet the application fields such as satellites that require high measurement accuracy. In this paper, the main loop detector loop from the closed loop error analysis, respectively, from the electronic crosstalk, Y waveguide nonlinearity and D / A converter nonlinear and other aspects, discussed the case of a small angular rate input, respectively, the FOG Scale factor non-linear effects, and gives an improved method. The experimental results show that after taking appropriate measures, the linearity of scale factor of fiber optic gyroscope has been obviously improved.