摘要
【目的】探讨机械关键部位缺陷信号在经过界面结构时易受中间介质的影响而难以准确识别的问题。【方法】以界面结构间常见的水和机油作为中间介质,结合随机共振理论和Kurtogram算法对不同中间介质与信号传输特性之间的关系进行深入研究。【结果】当中间介质的面积增加时,信号的能量相对衰减率呈先减小后稳定的趋势,且与机油相比,通过水的信号的能量衰减速度更快。【结论】对通过不同介质的信号进行了随机共振和快速Kurtogram算法的处理,将处理结果与原始信号对比,发现该方法能有效提高信号特征参数的可辨度;另外,能量相对衰减率能有效表征通过不同中间介质的信号在信号集中频率区域内的变化规律。
[Purposes]The paper aims to solve the problem that the defect signal on the key parts of the machinery is difficult to identify accurately under negative effect by the intermediate medium through the interface structure.[Methods]Water and machine oil have always been considered between interface structures as intermediate medium.Here,the relationship between different intermediate media and signal transmission characteristics was deeply studied by combining stochastic resonance theory and Kurtogram algorithm.[Findings]When the area of intermediate medium increases,the relative attenuation rate of the signal energy first decreases and then becomes constant.However,compared with oil,the energy attenuation speed of the signal passing through water is faster.[Conclusions]The signals passing through different intermediate media have been processed by stochastic resonance and fast Kurtogram algorithm.Comparing with the original signals,it is found that the methods can effectively improve the identify ability of signal characteristic parameters.In addition,the relative attenuation rate of the signal energy can be used to characterize the changing law of signals passing through different intermediate media in the frequency domain of signal concentration.
作者
王向红
谢红
赵淑慧
WANG Xianghong;XIE Hong;ZHAO Shuhui(School of Automotive and Mechanical Engineering,Changsha University of Science&Technology,Changsha 410114,China;Hunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High‑Performance Mechanical Equipment,Changsha University of Science&Technology,Changsha 410114,China)
出处
《长沙理工大学学报（自然科学版）》
CAS
2023年第1期104-111,共8页
Journal of Changsha University of Science and Technology:Natural Science
基金
湖南省教育厅创新平台开放基金资助项目(19K009)。
关键词
界面结构
中间介质
随机共振
快速Kurtogram算法
能量相对衰减率
interface structure
intermediate medium
stochastic resonance
fast Kurtogram algorithm
relative attenuation rate of energy
