航空学报 > 2021, Vol. 42 Issue (11): 524845-524845   doi: 10.7527/S1000-6893.2021.24845

基于传递函数特征的机械结构故障诊断方法新进展

李全坤1,2, 景兴建2   

  1. 1. 西北工业大学 动力与能源学院, 西安 710129;
    2. 香港理工大学 机械工程系, 香港 999077
  • 收稿日期:2020-10-08 修回日期:2020-12-05 发布日期:2021-06-08
  • 通讯作者: 景兴建 E-mail:xingjian.jing@polyu.edu.hk
  • 基金资助:
    中央高校基本科研业务费专项资金(3102020OQD705);香港研究资助局优配研究金(15206717)

Recent advances of fault diagnosis methods based on transmissibility function for mechanical structures

LI Quankun1,2, JING Xingjian2   

  1. 1. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710129, China;
    2. Department of Mechanical Engineering, Hong Kong Polytechnic University, Hong Kong 999077, China
  • Received:2020-10-08 Revised:2020-12-05 Published:2021-06-08
  • Supported by:
    The Fundamental Research Funds for the Central Universities (3102020OQD705); The General Research Fund (GRF) Project of Hong Kong Research Grants Council (RGC) (15206717)

摘要: 故障诊断对估计机械结构的健康状态非常重要,诊断方法一直以来也是研究的热点问题。与其他故障诊断方法相比,基于传递函数的故障诊断方法操作简单,提供的故障特征和指示因子也更加灵敏有效。根据所利用的线性传递函数或非线性传递函数的类型不同、基于传递函数的故障诊断方法目前大概有4类,即一般线性方法、一般非线性方法、基于广义频响函数(GFRF)方法和基于二阶输出频谱(SOOS)方法。本文旨在对各种基于传递函数的故障诊断方法研究进展进行梳理,通过带阻尼弹簧单元的多自由度模型解释各种方法的基本原理和操作流程,通过具体的仿卫星结构中螺栓松动故障实验比较各种方法的优缺点,探讨现有故障指示因子灵敏度的提高方式及现有方法在其他复杂机械结构中的运用前景。

关键词: 线性故障, 非线性故障, 传递函数, 故障识别, 故障定位

Abstract: The importance of fault diagnosis to health monitoring of mechanical structures draws extensive attention from researchers to diagnosis methods. Transmissibility function based methods, compared with other diagnosis methods, are much simpler and provide more sensitive and effective damage features and indexes. According to different transmissibility functions adopted, either linear or nonlinear, transmissibility function based methods can be classified into four categories:general linear methods, general nonlinear methods, methods based on Generalized Frequency Response Function (GFRF) and methods based on the Second Order Output Spectrum (SOOS). The main purpose of this article is to provide a comprehensive review on recent advances of fault diagnosis methods based on linear and nonlinear transmissibility functions, explain their basic principles and procedures through nonlinear multiple degrees of freedom models, demonstrate their merits and demerits with experimental results on a bolted satellite-like structure, and discuss their improvement in sensitivity of related damage indicators and potential applications to some complex structures.

Key words: linear faults, nonlinear faults, transmissibility functions, fault detection, fault location

中图分类号: