基于参数微调最小二乘拟合的某型惯导陀螺常值温漂补偿

Temperature compensation on gyroscope constant drift of INS based on LSF and parameter fine-tuning

陀螺常值温漂是造成某型惯性导航系统导航精度降低的主要原因之一,为实现长时间、高精度导航,对陀螺常值温漂进行补偿显得尤为重要。通过变温度陀螺常值测试试验数据,分析了温度变化对陀螺常值漂移的作用机理,建立了陀螺常值与温度的二阶温补模型,采用了最小二乘拟合提取了常值温漂变化规律,并通过参数微调最小二乘拟合结果对陀螺常值漂移进行了补偿。最后,利用多组变温度陀螺常值试验数据对所述补偿方法进行了验证,结果表明:该方法可以将温度变化引起的陀螺常值漂移最大值由0.018°/h减小至0.005°/h,满足惯导的精度要求,具有较强的工程应用价值。

Gyroscope constant drift is one of the main factors of navigation error.In order to realize long-distance and high-precision navigation,it is essential to take temperature compensation on gyroscope constant drift into consideration,Based on the constant drift experiments in different temperature environments,the relationship between constant drift and temperature is analyzed,the compensating model is established,and the least square fitting method is used to compensate the drift.Experiment result shows that the drift caused by temperature can be reduced from 0.018°/h to 0.005°/h,which is satisfied the required precision and has strong engineering application value.