机抖激光陀螺捷联系统中惯性器件的温度补偿的研究

Research on Temperature Compensation Model of Inertial Sensor in Mechanically Dithered RLG's SINS

研究了机抖激光陀螺和加速度计的温度特性。通过重复性温度实验,得到了激光陀螺零偏的温度补偿模型;通过静态特性测试,得到了加速度计的补偿模型。结果表明,得到的模型可以有效补偿惯性传感器的漂移,使陀螺的精度提高了4.6倍,加速度计的漂移小于一个脉冲,并可以通过温度补偿来缩短系统的预热时间,由原来的半小时到基本不需预热;系统的精度提高了1倍。

Based on temperature experiment, the temperature characteristic of mechanically dithered RLG and accelerometer has been studied. The temperature compensation model of RLG＇s bias and aceelerometer＇ s output has been gained by temperature experiment repeated and static output characteristic tested. It has been shown that these models can compensate the bias of the inertial sensor effectively. The RLG＇s precision is improved about five times and the accelerometer＇ s drift is less than one pulse. The SINS＇s precision can be improved about two times. The warm-up time can be shortened by temperature compensation. The system has no use for warm-up time.