二频机抖激光陀螺抖动频率与温度关系的研究

Research of the relation between dither frequency and temperature in mechanically dithered ring laser gyro

针对激光陀螺的零偏受温度影响较大,为提高陀螺精度,研究了二频机抖激光陀螺抖动频率与温度之间的关系。通过大量的重复性高低温实验,证明了抖动频率与温度的线性关系,并得到了拟合直线表达式。结果表明,抖动频率与温度具有较好的线性关系,抖动频率可作为温度测量的计量,而且具有较好的重复性。由于测量抖动频率的精度较高,故由抖动频率测量温度具有很高的分辨率。同时用抖动频率对陀螺的零偏进行补偿,提高了陀螺的精度。

Temperature is one of the most important elements that affect the precision of ring laser gyro（RLG）. The relation between dithered frequency and temperature is studied. It is shown that dither frequency is proportional linearly to the temperature and the linear expression is achieved via repeative high-low temperature experiments. The result show the resolution of temperature measured by dither frequency is very high. The RLG＇s precision can be improved by dither frequency compensation instead of temperature compensation.