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ZHANG Li-min, ZHANG Wei-hua, DUAN He-peng. Physical parameter identification method of vibration system based on minimum correction value method[J]. Journal of Traffic and Transportation Engineering, 2009, 9(3): 53-55. doi: 10.19818/j.cnki.1671-1637.2009.03.010
Citation: ZHANG Li-min, ZHANG Wei-hua, DUAN He-peng. Physical parameter identification method of vibration system based on minimum correction value method[J]. Journal of Traffic and Transportation Engineering, 2009, 9(3): 53-55. doi: 10.19818/j.cnki.1671-1637.2009.03.010
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Physical parameter identification method of vibration system based on minimum correction value method

doi: 10.19818/j.cnki.1671-1637.2009.03.010

  • Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

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  • Author Bio:

    ZHANG Li-min(1960-), male, researcher, PhD, +86-28-86466211, zhang-lm01@163.com

  • Received Date: 2008-12-21
  • Publish Date: 2009-06-25
    Abstract
  • Based on the orthogonality of the vibration modal matrix with respect to the mass and stiffness matrices for vibration system, the minimum correction values of physical parameters for vibration system were identified by vibration frequency and model.The optimization problem of vibration system with restrictions was solved by Lagrange multipler.A physical parameter identification method was proposed based on measured modal data.The formulae of physical parameter identification for holonomic and nonholonomic modal parameters were educed.An iterative arithmetic was given.The modal experiment and numerical analysis of a vibration system with 4 DOFs were carried out.Analysis result shows that the mass and stiffness matrices approach their real values, their maxmum errors are 0.34% and 0.086% respectively, so the method has high reliability.

     

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