High energy efficient independent method for optimal sensor placement

被引：0

作者：

Shi H. ^{[1
]}

Sun A. ^{[1
]}

机构：

[1] School of Mechanical, Electrical Control Engineering, Beijing Jiaotong University, Beijing

来源：

Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2022年 / 43卷 / 11期

关键词：

Effective independence method; Modal test; Optimal sensor placement; Structural health monitoring;

D O I：

10.19650/j.cnki.cjsi.J2210092

中图分类号：

学科分类号：

摘要：

To address the problem of optimal sensor placement of structural health monitoring, the influence of the modal kinetic energy and the modal strain energy is considered. A high energy effective independence (E-EI) method based on the effective independence (EI) method is proposed, which solves the deficiency that EI method is easy to lose high energy measurement points. The normalized equivalent energy matrix with multiple energy parameters is derived, and the energy distribution of the measurement points is judged by the size of the diagonal elements of the matrix. The superiority and generalization of the E-EI method are evaluated through the comparative analysis of EI method, E-EI method and other improved algorithms of EI method in terms of energy distribution, orthogonality, and the amount of information contained in the measurement points through five evaluation criteria, using the space truss transmission tower as simulation example and the switch rail as experimental test. Results show that E-EI method not only achieves the purpose of screening high energy measurement points, but also retains the advantages of EI method with high linear independence compared with other improved algorithms.The mean value of non-diagonal elements of MAC matrix of E-EI method is reduced by 5.48%. The mean value of modal kinetic energy is increased by 133.27%. The mean value of modal strain energy is increased by 35.82% compared with EI method in the switch rail experiment with 12 sensors. © 2022, Science Press. All right reserved.

引用

页码：53 / 61

页数：8

共 20 条

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