Calibration of Sensitivity Coefficient of Three-dimensional High-g Accelerometer Based on Vector Decomposition

doi:10.3969/j.issn.1000-1093.2021.07.021

Abstract

Abstract: In order to generate synchronous measurable tri-axial acceleration overload pulse and calibrate the sensitivity coefficient of three-dimensional high-g accelerometer, Hopkinson bar system is designed to a cylindrical bar with one bevel end on which the accelerometer is placed. The Hopkinson bar system was theoretically analyzed, and simulated and tested by using Abaqus finite element software. The results show that the Hopkinson bar system is used easily to realize the sensitivity coeficient calibration of three-dimensional high-g accelerometer, the synchronization of three-axis loading pulse and the decoupling between axes; according to the optimization design, the different amplitudes of the three-axis high-g accelerometer can be calibrated by analyzing the relationship between the three-axis accelerometer and the standard rod; and different slope angles and accelerator installation angles will cause the changes in vector decomposition, which will affect the pulse configuration. The slope angle with the minimum error is 45° in numerical simulation. Finally, the sensitivity coefficient of three-dimensional high-g accelerometer can be calibrated by loading the standard uniaxial bar and decomposing the vector on inclined plane.

Key words: three-dimensionalhigh-gaccelerometer, Hopkinsonbarwithonebevelend, vectordecomposition, calibration

CLC Number:

O347.4⁺1

WU Qian， GUO Weiguo. Calibration of Sensitivity Coefficient of Three-dimensional High-g Accelerometer Based on Vector Decomposition[J]. Acta Armamentarii, 2021, 42(7): 1535-1543.

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