分析了光纤陀螺的温度特性及非线性特性,并在组建光纤陀螺温度试验系统的基础上,进行了全温度范围下的位置试验和角速率试验,研究不同的温度及输入角速率对光纤陀螺输出的影响。根据试验结果,分别建立了光纤陀螺零偏的温度模型以及标度因数的温度和非线性模型,并采用最小二乘法拟合模型的参数。通过实测数据进行仿真验证,结果表明,建立的模型能够较好地描述光纤陀螺的温度及非线性特性,利用该模型进行光纤陀螺的温度和非线性误差补偿,取得了较好的效果,光纤陀螺的测试精度得到了较大程度的提高。

The temperature and nonlinear characteristics of Fiber Optic Gyro (FOG) are analyzed,and position and angular velocity experiments are carried out based on the temperature test system,so the effects of different temperature and angular velocity on FOG’s output can be studied. According to experimental results,temperature error model of zero bias and temperature and nonlinear error model of scale factor of FOG are built,whose parameters are estimated by using least square method. Through simulation,it is proved that the built models can reflect the temperature and nonlinear characteristics of FOG very well. Then the compensation can be done based on the models,and the accuracy of FOG can be improved greatly.