【摘要】 研究了光纤环非稳态传热过程中的非互易相位噪声特性。根据光纤陀螺在实际应用中环境温度的干扰,通过有限差分法,建立了光纤环时变温度场分布模型,对光纤环在非稳态传热过程中的温度场进行了模拟分析。在此基础上,针对不同绕制结构的光纤环,对其温度漂移进行了数值模拟和比较。实验表明,交叉子绕线方案能更好地抑制光纤环热致非互易噪声的影响,从而能提高干涉型光纤陀螺的长期漂移精度。更多还原

【Abstract】 The characteristic of thermal induced non-reciprocal phase noise of fiber optical coil was analyzed.The zero point of the fiber optic gyros(FOG) is drift induced by outside temperature fluctuation,and the temperature distribution model was derived for the fiber optic coil by finite difference method.Based on the model,an analysis on the output error caused by the temperature change inside the FOG was made,according to the simulation and comparing of several different techniques of coil winding.Experiments indicates that the cross winding technique is better for weakening the non-reciprocity noise of fiber optical gyros by temperature.更多还原