棱镜式激光陀螺多温度点的零偏补偿方法

Zero Bias Compensation of Multiple Temperature Points of the Prism Laser Gyro

棱镜式激光陀螺的光路与反射镜式激光陀螺的光路不同,有较长的光路在棱镜中通过,其零偏受温度影响较大。文中分析了棱镜式激光陀螺的零偏温度特性,研究了零偏与温度、温度变化率和温度梯度的相关关系。建立了复杂温变环境下多温度点的二阶动态温度模型,优化出对陀螺零偏贡献最大的两个温度检测点,并对随机温变数据进行补偿。结果表明,多温度点的二阶动态温度模型能很好地补偿复杂温变引入的零偏变化,使零偏稳定性提高60%以上。

The optical path of the prism ring laser gyro is different from that of the reflector ring laser gyro in that quite long optical path is through the prism, so the temperature has an effect on zero bias. This article analyzes the characteristics between zero bias of prism laser gyro and temperature, and studies the relationship between the zero bias and the temperature, temperature change rate and temperature gradient. A multi - point second - order dynamic temperature model in complex temperature environment is established, with the two temperature measuring points for great contribution to gyro＇s zero bias optimized and the random temperature variable data compensated. Resuits show the multi -point second -order dynamic temperature model can better compensate the zero bias＇s variety introduced by complex temperature variety, with bias stability improved by more than 60%.