Research on Field Calibration Method for MEMS Accelerometer Based on Support Ellipsoid Fitting

doi:10.3969/j.issn.1000-1093.2020.01.008

Abstract

Abstract: In order to solve the problem that the zero drift error, scale factor error and cross-coupling error of accelerometer in the micro-electro mechanical system change with time, a calibration method based on the support degree ellipsoid fitting is proposed. The proposed method can be used easily, quickly and efficiently to calibrate the accelerometer outdoor. Based on the traditional ellipsoid fitting method, this method combines the support method with the ellipsoid method. An ellipsoid constraint model and the support matrix are established for calibrating the errors of the micro-electro-mechanical system (MEMS) accelerometer. Finally，the output of MEMS accelerometer is compensated by using an error compensation equation. It is proved by experiments that the proposed method can be used for calibrating without precision calibration equipment, and its calibration accuracy is twice of the traditional ellipsoid fitting method. Key

Key words: micro-electro-mechanicalsystemaccelerometer, supportdegree, ellipsoidfitting, fieldcalibration, errorcompensation

CLC Number:

TH824⁺.4

ZHOU Quan, YAO Minli, SHEN Xiaowei. Research on Field Calibration Method for MEMS Accelerometer Based on Support Ellipsoid Fitting[J]. Acta Armamentarii, 2020, 41(1): 68-74.

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第41卷第1期
2020 年1月兵工学报ACTA
ARMAMENTARIIVol.41No.1Jan.2020

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