变转速下机械设备动态信号分析方法的回顾与展望

发布时间：2018-06-28 22:17

本文选题：变转速 + 机械设备　；参考：《中国科学:技术科学》2015年07期

【摘要】：变转速下,传统的等时间间隔采样所获得的机械动态信号已不再保持原有的周期特性,此时,无法采用经典的基于傅里叶变换理论谱分析方法来分析信号.为此,各种针对变转速机械设备动态信号的分析方法纷纷推出.尤其在近几年,这一问题已成为机械故障诊断领域国内外同行关注的焦点.然而,不同类型机械设备的转速变化形式千差万别,测试条件也各不相同,已有的各种方法到底具有怎样的适应性,还有哪些问题尚未解决,一直没有深入讨论.本文针对这一背景,对现有的变转速机械设备的动态信号分析方法进行梳理,从阶次跟踪、循环平稳分析、时频分析、经验模式分析、非平稳建模等几个方面进行评述,对其发展的技术路线、适用范围、使用方法以及发展空间开展讨论,并指出变转速机械设备的信号分析、故障诊断所需要进一步开展的研究方向.
[Abstract]:At variable rotational speed, the traditional mechanical dynamic signal obtained by equal-time interval sampling can no longer maintain the original periodic characteristic. At this time, the classical spectral analysis method based on Fourier transform theory can not be used to analyze the signal. Therefore, a variety of dynamic signal analysis methods for variable speed mechanical equipment have been developed. Especially in recent years, this problem has become the focus of attention at home and abroad in the field of mechanical fault diagnosis. However, the rotational speed of different types of mechanical equipment varies widely, and the testing conditions are different. What kind of adaptability and what problems have not been solved have not been thoroughly discussed. In this paper, the existing dynamic signal analysis methods of variable-speed mechanical equipment are reviewed, including order tracking, cyclic stationary analysis, time-frequency analysis, empirical mode analysis, non-stationary modeling and so on. The technical route, application scope, application method and development space of the equipment are discussed, and the further research directions for signal analysis and fault diagnosis of mechanical equipment with variable rotational speed are pointed out.
【作者单位】：西安交通大学机械制造系统工程国家重点实验室;西安交通大学机械工程学院;
【基金】：国家自然科学基金(批准号:51125022,51405373)资助项目
【分类号】：TH165.3;TN911.6

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