The Dynamic Compensation of Accelerometer Working on NGIMU

Non-gyro micro inertial measurement unit (NGIMU) uses only accelerometers replacing gyroscopes to compute the motion of a moving body. Basing on a nine-accelerometer configuration of NGIMU, a dynamic navigation model is set up according to the dynamic characteristic of the accelerometer. The dynamic compensation to the accelerometer is done to improve the navigation precision of the NGIMU. Asimulation case for estimating the errors of the angles in three axes is investigated. The simulation results show that the stronger the dynamic characteristic of the accelerometer input signal, the larger the navigation error of the NGIMU. After the dynamic compensation, the navigation precision is improved effectively.