基于能量譜特征的變速風(fēng)機(jī)振動(dòng)調(diào)制信號(hào)的檢測(cè)方法
發(fā)布時(shí)間:2018-10-17 12:58
【摘要】:風(fēng)機(jī)運(yùn)行狀態(tài)評(píng)估是提高風(fēng)機(jī)穩(wěn)定性并降低運(yùn)行成本的有效手段。為消除風(fēng)機(jī)狀態(tài)監(jiān)測(cè)中時(shí)變風(fēng)速對(duì)風(fēng)機(jī)機(jī)械振動(dòng)的時(shí)頻特性的影響,引入無量綱希爾伯特-黃變換方法繪制信號(hào)的幅值及能量譜特性。為了保證振動(dòng)信號(hào)調(diào)制特征提取精度的同時(shí)降低計(jì)算量,提出了一種根據(jù)希爾伯特-黃譜的振動(dòng)調(diào)制信號(hào)周期特征的提取方法,以風(fēng)機(jī)齒輪箱振動(dòng)信號(hào)為對(duì)象進(jìn)行了調(diào)制特征提取實(shí)驗(yàn),并將提取結(jié)果與目前風(fēng)機(jī)運(yùn)行狀態(tài)評(píng)估常用的傅里葉方法的結(jié)果進(jìn)行了對(duì)比。
[Abstract]:Fan operation state evaluation is an effective means to improve fan stability and reduce operating cost. In order to eliminate the influence of time-varying wind speed on the time-frequency characteristics of mechanical vibration in fan condition monitoring, the dimensionless Hilbert-Huang transform method was introduced to plot the amplitude and energy spectrum characteristics of the signal. In order to ensure the accuracy of vibration signal modulation feature extraction and reduce the computational complexity, a vibration modulation signal periodic feature extraction method based on Hilbert-Huang spectrum is proposed. Based on the vibration signal of fan gearbox, the modulation feature extraction experiment is carried out, and the results are compared with the results of Fourier method which is commonly used in the evaluation of fan running status.
【作者單位】: 國電聯(lián)合動(dòng)力風(fēng)電設(shè)備及控制國家重點(diǎn)實(shí)驗(yàn)室;國電新能源技術(shù)研究院;
【基金】:國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(973計(jì)劃)(2012CB215205)~~
【分類號(hào)】:TM315
[Abstract]:Fan operation state evaluation is an effective means to improve fan stability and reduce operating cost. In order to eliminate the influence of time-varying wind speed on the time-frequency characteristics of mechanical vibration in fan condition monitoring, the dimensionless Hilbert-Huang transform method was introduced to plot the amplitude and energy spectrum characteristics of the signal. In order to ensure the accuracy of vibration signal modulation feature extraction and reduce the computational complexity, a vibration modulation signal periodic feature extraction method based on Hilbert-Huang spectrum is proposed. Based on the vibration signal of fan gearbox, the modulation feature extraction experiment is carried out, and the results are compared with the results of Fourier method which is commonly used in the evaluation of fan running status.
【作者單位】: 國電聯(lián)合動(dòng)力風(fēng)電設(shè)備及控制國家重點(diǎn)實(shí)驗(yàn)室;國電新能源技術(shù)研究院;
【基金】:國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(973計(jì)劃)(2012CB215205)~~
【分類號(hào)】:TM315
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