加速度计静态温度模型辨识及温度补偿方法研究

Study of the identification for the static temperature model and the method for compensating temperature of the accelerometer

为了消除环境温度对加速度计精度的影响，采用最小二乘法拟合得到了石英挠性摆式加速度计数学模型的系数随温度变化的规律，建立了20℃～50℃温度范围内加速度计的静态温度模型.由TMS320F240DSP组成的硬件系统利用该模型进行温度补偿后，加速度计输出随温度变化的数量级为10^-4，相对于没有进行温度补偿前的10^-3，补偿效果明显．

To eliminate the impact of temperature on accelerometer, by using the method of least square estimation, a law that the coefficients of the accelerometer model vary with temperature has been obtained, and the static temperature model of the accelerometer within 20℃- 50℃ has also been established. The hardware system is composed of DSP（TMS320F240）. After temperature compensation with the above model by the system, the magnitude of output change is 10^-4 , but without temperature compensation the magnitude of output change is 10^-3 , and the output of the accelerometer＇s stability has a significant improvement.