Temperature Compensation for Gyroscope Free Micro Inertial Measurement Unit

On the basis of analyzing the temperature output characteristics of accelerometers, this paper presents a temperature compensation method for gyro-free micro inertial measurement unit (GF-MIMU) so as to reduce the accelerometer output error caused by the variation with the temperature of working environment. Integrating the temperature-sensitive output model with the acceleration-sensitive output model, the new temperature compensation method is proposed. Experimental results demonstrate the method can effectively compensate for accelerometer measurement error caused by the variation in temperature, and thus improve the actual working precision of GF-MIMU.