本文選題：多重重疊技術(shù)　切入點(diǎn)：相對最大值抽取　出處：《振動(dòng)與沖擊》2017年16期

【摘要】：由于具有較小的旁瓣,漢寧、漢明和三角窗常被用于振動(dòng)信號頻譜分析中。但是,加這些窗會導(dǎo)致落在窗邊緣的脈沖信號受到抑制而無法被有效檢測出來,而脈沖信號中可能含有設(shè)備運(yùn)行重要信息。針對此問題,研究了基于多重重疊技術(shù)的振動(dòng)信號頻譜分析方法并提出了相對最大值抽取的多重重疊算法。通過虛擬仿真信號和MFS-MG機(jī)械故障仿真試驗(yàn)臺實(shí)測信號對多重重疊頻譜分析方法進(jìn)行了試驗(yàn)測試。虛擬仿真結(jié)果表明:邊緣脈沖信號的多重重疊頻譜幅值為一般頻譜分析方法的8~10倍;試驗(yàn)臺故障模擬信號的分析結(jié)果同樣表明,多重重疊頻譜分析方法比一般頻譜分析方法更能表現(xiàn)邊緣脈沖信號的寬頻特征。
[Abstract]:Because of its small sidelobe, Hanning, hamming and triangular windows are often used in the spectrum analysis of vibration signals.However, adding these windows will result in the suppression of the pulse signal which falls on the edge of the window and can not be effectively detected, and the pulse signal may contain important information about the operation of the device.In order to solve this problem, the spectrum analysis method of vibration signals based on multiple overlaps is studied and a multi-overlapping algorithm for extracting the relative maximum value is proposed.The method of multiple overlapping spectrum analysis is tested by virtual simulation signal and measured signal of MFS-MG mechanical fault simulator.The virtual simulation results show that the amplitude of multiple overlapped spectrum of edge pulse signal is 8 ~ 10 times that of the general spectrum analysis method, and the analysis result of fault analog signal of the test rig also shows that,Multiplex overlapping spectrum analysis method is better than the conventional spectrum analysis method to represent the wide band characteristics of edge pulse signal.
【作者單位】： 河南工業(yè)大學(xué)機(jī)電工程學(xué)院;重慶大學(xué)機(jī)械工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目資助(U1604134;51541508) 河南省科技項(xiàng)目資助(152300410201)
【分類號】：TH17
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本文編號：1705121