微小型导航定位系统的关键核心器件MEMS陀螺受温度影响较大,其零偏误差呈现较强的非线性且变化范围较大,常规补偿方法较为复杂。针对上述问题,通过分析MEMS陀螺敏感环境温度的统计特性,提出了一种基于陀螺差分布局的温漂误差补偿的新方法。实验表明:在-40~+60℃的温度范围内,采用新方法补偿后MEMS陀螺的漂移差值均有显著改善,削弱了温度的影响,可有效抑制MEMS陀螺温漂。该方法结构简单,易于物理实现,具有很好的工程实用价值。
In the adverse application environment of wearable navigation and positioning system with different temperature,a MEMS gyro may exhibit zero bias error with serious nonlinearity and large scale due to effect of temperature,for which compensation by conventional method is more complex. In this paper,a new compensation method is proposed for this temperature drift based on a differential layout of gyro,by analyzing the statistical characteristics of the temperature of the MEMS gyroscope.Experimental results show that using the new compensation method,the MEMS gyro drift difference is significantly resolved in the temperature range of-40 ~ + 60℃,greatly weakening the effect of temperature and effectively inhibiting the gyro temperature drift,which verifies the effectiveness of this method. The method is simple in structure and easy to be realized in physics and has a great practical value in engineering.