Gravity based online calibration for monolithic triaxial accelerometers´ gain and offset drift

In most industry process, periodic sensor calibrations are required to assure sensors working properly. Real-time, online calibration processing for accelerometer is usually needed in some special situation. The paper presents a new and simple method for monolithic triaxial accelerometer gain and offset drift calibration. The procedure uses the fact that the modulus of the inertial mass of the triaxial accelerometer equals 1g under static conditions. The paper consider a state estimate problem where the measure equation is linear but the sensor has a time-varying gain and offset In our study, the input noises of the accelerometers existed in signals are also considered in the calibration procedure.