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随着光纤陀螺使用精度的提升,输入轴失准角误差对光纤惯组精度的影响也愈发突出。为了抑制光纤陀螺失准角误差,提升惯性系统精度,分析了失准角误差的产生原因,提出了设计与生产过程中减小失准角误差的工艺要求;分析了温度环境下失准角误差补偿方法的物理意义,进而推导得出其方法误差;对多组全温范围内(-40℃~+60℃)失准角实测数据进行逐步回归分析,确定失准角误差拟合模型。试验表明,采用该补偿方法最高能够降低92%的失准角误差。
With the improvement of the accuracy of using FOG, the influence of input misalignment angle on the accuracy of FHR becomes more and more prominent. In order to restrain the misalignment error of FOG and improve the precision of inertial system, the reason of misalignment angle error was analyzed. The technological requirements for reducing misalignment angle error in design and production process were put forward. The misalignment angle error Compensates the physical meaning of the method, and derives its method error. The regression analysis of the measured data of the misalignment angles over the whole temperature range (-40 ℃ ~ + 60 ℃) is carried out to determine the mismatch error fitting model. Experiments show that using this compensation method can reduce up to 92% of the misalignment angle error.