对轴误差对光纤陀螺输出的影响

理论分析并试验研究了Y波导保偏尾纤与保偏光纤线圈之间熔接点的对轴误差对光纤陀螺输出的影响.根据简化的光纤陀螺光路误差模型，对光纤陀螺的输出相位误差与光路中主要耦合点的对轴误差的关系进行了理论推导和仿真分析，并利用一个实际的闭环光纤陀螺试验研究了主要熔接点的对轴误差变化对光纤陀螺零偏和零偏稳定性的影响.结果表明，Y波导保偏尾纤与保偏光纤线圈之间的对轴误差是引起光纤陀螺输出误差的重要因素，必须尽量减小.

Effect of the Principal Axes Angle-Offsets on Fiber-optic Gyroscope Output

The effect of the principal axes angle-offsets of two splice points between the Y branch and PM fiber coil on the output errors of fiber-optic gyroscope(FOG) was investigated theoretically and experimentally.According to a simplified error model of the optical circuit of FOG,the relation between the phase error of FOG and the principal axes angle-offsets of the main coupling points was derived and emulated.Then using a closed-loop FOG,the variations of the bias and bias stability of FOG when changing the pr...