The Inversion Approach of Power Flow in Load Identification

Abstract:

A study about the structure load identification was made in this paper, based on the SEA power flow method. An inversion formula was firstly developed for the case that the load position is known. Using the formula, an algorithm was proposed to locate the source when the load position is unknown. A reference source must be chosen to utilize the algorithm. To make full use of the surplus data and to further improve the identification accuracy, the least square method was applied. Experiments about both cases were taken to validate the approach obtained above and it was shown that the approach is correct and effective. It is proved that the power flow inversion approach has some practical value in engineering.

• Periodical: Applied Mechanics and Materials (Volume 577)
• Pages: 281-284
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.577.281
• Online since: July 2014
• Authors: Jian Gang Ma*, Mei Ping Sheng, Zhi Wei Guo
• Keywords: Inversion Approach, Load Identification, Power Flow, SEA, Surplus Data

References

[1] Zuo Hesheng, Peng Yuying. Vibration Test in Modal Analysis. Beijing. China Railway Publishing House. (1995).

[2] Mao Yuming. The Theoretical Approach and Experimental Study on the Inverse Problem of Dynamic Force Identification in Time Domain. Dalian: Dalian University of Technology. (2010).

[3] N. Eills. A Technique for Evaluating the Fluctuating Aerodynamic Forces on a Flexible Building, Presented at the International Symposium on Vibration Problems in Industry, Kesuiek, England, (1973).

[4] Yao Deyuan, Wang Qizheng. Principle and Application of Statistical Energy Analysis. Beijing: Beijing Institute of Technology Press, (1995).

[5] Xue Yonggang, Xie Shilin, Zhang Xinong. High-frequency Load Identification of Complex Structural Coupling System. Noise and Vibration Control, 2010, 2: 96-98.