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JACIII Vol.26 No.6 pp. 965-973
doi: 10.20965/jaciii.2022.p0965
(2022)

Paper:

Two Degree of Freedom Dynamic Model Parameter Identification of Accelerometer Using Feature Point Coordinate Estimation and Amplitude Correction

Qingxuan Wei and Xueting Li

Information Engineering College, Beijing Institute of Petrochemical Technology
No.19 Qingyuanbei Road, Daxing District, Beijing 102617, China

Corresponding author

Received:
March 14, 2022
Accepted:
July 6, 2022
Published:
November 20, 2022
Keywords:
accelerometer, two degree of freedom dynamic model, feature point coordinate estimation, amplitude correction
Abstract

The accurate identification and characterization of the accelerometer dynamic model parameters play an important role in improving the dynamic performance of the device or system with an accelerometer. To overcome the problem that the traditional single degree of freedom (SDF) dynamic model of the accelerometer cannot describe the dynamic characteristics beyond the first resonant frequency of the accelerometer, a two degree of freedom (TDF) dynamic model of the accelerometer was constructed. On this basis, a parameter identification method for the TDF dynamic model of the accelerometer based on the feature points coordinate estimation and amplitude correction was proposed. First, the zero frequency point coordinates of the accelerometer frequency response were obtained by the Hv method. The first and second resonance point coordinates were estimated by discrete spectrum correction and the least square (DSC-LS) method. Then, the amplitude correction coefficient was applied to eliminate the influence of series coupling on the amplitude. Finally, the TDF dynamic model parameters of the accelerometer were calculated through the feature point coordinates. The experimental results show that the method has high accuracy and can avoid the influence of series coupling on the parameter identification accuracy of the accelerometer’s TDF dynamic model without complex derivation and decoupling operations. The identified TDF dynamic model of the accelerometer can represent the dynamic characteristics with a higher frequency range.

Cite this article as:
Q. Wei and X. Li, “Two Degree of Freedom Dynamic Model Parameter Identification of Accelerometer Using Feature Point Coordinate Estimation and Amplitude Correction,” J. Adv. Comput. Intell. Intell. Inform., Vol.26, No.6, pp. 965-973, 2022.
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Last updated on Nov. 24, 2022