光纤环十六极对称绕法温度性能的仿真与分析

温度性能对光纤陀螺的精度影响至关重要。通过深入研究光纤环的十六极对称绕法,达到了改善光纤陀螺温度性能的目的。在对光纤陀螺由Shupe误差引起的热致旋转速率误差数学模型离散化的基础上,结合ANSYS有限元分析软件建立了精确到匝的光纤环十六极对称绕法有限元模型。根据所建立的光纤环温度分布模型,仿真分析比较了在光纤环四周施加变化的温度激励和分别在径向和轴向施加相同的恒定温度激励下,十六极对称绕法与四极和八极对称绕法绕制的光纤陀螺的温度性能。仿真实验结果显示:由十六极对称绕法绕制的光纤陀螺的热致旋转速率误差要低于四极和八极对称绕法1~2个数量级,这对十六极对称绕法在高精度光纤陀螺中的应用具有重要意义。

Simulation and analysis on temperature performance of fiber ring by 16-polar symmetrical winding method

A 16-polar symmetrical winding method for fibre ring is studied to improve the FOG temperature performance which is vital to the precision of FOG.Based on the discretized Shupe error mathematical heat transfer model of FOG and by using ANSYS finite element analysis software,a 16-polar finite element model with accuracy to turn is established for fiber coil winding.Then,by applying varied-temperature excitation around the fiber coil and constant-temperature excitation on the radial direction and axial direction of fiber coil respectively,the simulation analysis and comparison are made on temperature performances of FOG winding by quadrupolar,octupolar,and 16-polar symmetrical winding methods respectively according to the fiber coil temperature distribution model.Simulation results show that the thermally induced rotation rate error of FOG wingding by 16-polar symmetrical winding method is 1 to 2 orders of magnitude less than those by quadrupolar and octupolar winding methods,which is important for 16-polar symmetrical winding method's application in high-accuracy FOGs.