中大機構典藏-NCU Institutional Repository-提供博碩士論文、考古題、期刊論文、研究計畫等下載:Item 987654321/2840
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 65318/65318 (100%)
造访人次 : 21618068      在线人数 : 207
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/2840


    题名: 經驗模態分解法於渦輪幫浦軸承故障診斷研究;Fault Diagnosis of Turbo-pump Bearings Using Empirical Mode Decomposition
    作者: 李逸凡;Yi-Fan Li
    贡献者: 機械工程研究所
    关键词: 軸承故障診斷;經驗模態分解法;包絡譜分析;渦輪幫浦;本質模態函數;Empirical Mode Decomposition;envelope analysis;turbo-pump;fault diagnosis;Intrinsic Mode Function
    日期: 2007-10-03
    上传时间: 2009-09-21 11:57:45 (UTC+8)
    出版者: 國立中央大學圖書館
    摘要: 本文主要應用經驗模態分解法於渦輪幫浦軸承故障診斷。研究初期設計軸承 缺陷模擬訊號進行技術開發及驗證,接著以放電加工與細孔加工方法製作軸承內 環及外環缺陷,分別實現在雙面轉子系統及渦輪幫浦實驗平台,用以確認技術之 實用性。研究中藉由經驗模態分解法不需定義其基本函數及轉換式之特性,改善 傳統帶通濾波包絡解調法缺點,避免實驗對象之結構共振頻率求取不易與帶通濾 波範圍選取容易受到主觀影響並造成包絡譜分析結果之差異。最後,比較以經驗 模態分解改良之包絡譜分析方法及傳統包絡譜分析方法之分析結果,進而探討兩 者間之優劣。本文說明發展在線式軸承監測診斷方法之實用性,未來可應用於其 他旋轉機器之故障診斷。 This thesis applies empirical mode decomposition in fault diagnosis of turbo-pump bearings. In the initial stage design simulation signals of fault bearing and do technical development as well as verify, next by electrical discharge machining and electrical discharge machining of deep hole in inner-ring and outer-ring of bearing to make defects technique for realizing the technique of breakdown diagnosis on two-plane rotor system and turbo-pump platform. Empirical mode decomposition no need to define basic function and transformation, which cause the defect of conventional envelope analysis with band-pass filtering could be improved during the research. With this character could the following phenomena be avoid: first, the hard obtainment about resonance frequency of subject; second, range of band-pass filtering could be easily influenced by subject in the time of choosing and result in the difference to result of envelope analysis. In the end compare the analysis from envelope analysis algorithm of empirical mode decomposition and the technique of conventional envelope analysis, then to discuss the advantage and deficiency between them. This thesis explains the practicality in development of on-line diagnosis technique of bearing monitoring, and in the future could be applied to other rotating machines for fault diagnosis.
    显示于类别:[機械工程研究所] 博碩士論文

    文件中的档案:

    档案 大小格式浏览次数
    0KbUnknown557检视/开启


    在NCUIR中所有的数据项都受到原著作权保护.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈  - 隱私權政策聲明