Abstract: As the core component of IMU, the accelerometer accuracy directly affects the IMU accuracy. In order to improve the output performance of accelerometer, a 24-position method is proposed to identify the accelerometer error parameters. Firstly, the accelerometer output error model is established according to the input and output formula of accelerometer. Then the accelerometer error model parameters are identified by 24-position method and the calibration process of which is designed in details giving the calculation method of scale factor, misalignment angle and zero offset of the accelerometer. Finally, position test is performed by turntable to collect data and to conduct calculation as well as data analyses. Experimental results show that the proposed method can quickly identify the accelerometer error parameters and establish an accurate accelerometer error model.

Key words: accelerometer, position test, error calibration, misalignment angle