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研究生:劉森維
論文名稱:滾珠軸承故障之振動診斷
論文名稱(外文):Fault Diagnosis of Vibrational Signature for Ball Bearing
指導教授:康淵康淵引用關係
指導教授(外文):Yuan Kang
學位類別:碩士
校院名稱:中原大學
系所名稱:機械工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2000
畢業學年度:88
語文別:中文
論文頁數:74
中文關鍵詞:振動故障診斷滾珠軸承信號特徵專家系統
外文關鍵詞:vibrational signaturefault diagnosisball bearingsignature characteristicexpert system
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即使最精密的機器也不可避免的產生振動,振動的增加,一定是由損壞引起的,損壞引致了機器的故障,因此,機器在運轉過程中的振動是故障診斷的重要訊號,反應了機器的工作狀況,藉由振動信號之偵測及損壞之診斷,可以預防故障之發生。
滾珠軸承是旋轉機械的重要零件,其功能在於減少摩擦,支持旋轉物體及承受負荷;旋轉機械在高速轉動情況下,滾珠軸承需保持在良好之狀態,若軸承損壞將產生異常振動,甚至因故障發生危險,所以必須在軸承發生損壞初期提早發現、以進行維修。
本研究利用時域分析、模態測試、頻譜分析等信號分析方法,研究正常軸承與損傷軸承之信號差異,建立其損傷信號特徵及診斷方法,並且據此建立軸承信號診斷之專家系統。
軸承損傷專家系統之診斷,同時提取時域信號及頻域信號的特徵,利用不確定推理之推理過程,以確定度表示信號特徵及推論結果為真實之程度,而診斷出軸承損傷之類型。
The vibrational signature in the process of machine operating is the important signature of the fault diagnosis. It will respond to the condition of the machine operating. Even the most accurate machine will vibrate when operating. The addition of vibration was brought by faulty.
Ball bearings are the important element in the rotatory machine. It can decrease the friction, hold rotatory elements, and aid get load. Rotating machines should be kept in good condition, during operation in high speed. When the elements of the machine failed, vibrations and damages are resulted. Hence, the distinguishing of abnormal signature are need before the failure happens.
In this study, we used the analytical method of the time domain method, frequency domain method, and model testing, to research the differences of the signature between normal and defective bearings. Find the characteristics of the signature of defective bearings, and establish the expert diagnosis system. To diagnose the bearings, we discovered the characteristics of the signature from time domain and frequency domain, and used the degree of certainty to express the degree of actuality of signal characteristic and conclusion.
中文摘要……………………………………….…………………….Ⅰ
英文摘要………………………………………….………………….Ⅱ
誌謝…………………………………………………………………...Ⅲ
目錄…………………………………………………….…………….Ⅳ
表目錄…………………………………………………….…………..Ⅵ
圖目錄………………………………………………………………...Ⅶ
第一章 導論………………………………………………………...1
第二章 信號採樣與信號分析方法………………………………..4
2.1 信號採樣…………………………………………………..4
2.2 時域分析…………………………………………………..5
2.3 頻域分析…………………………………………………..6
2.4 模態測試…………………………………………………..7
第三章 滾珠軸承損傷振動之分析………………………………..9
3.1 軸承各元件損傷之特徵頻率……………………………..9
3.2 軸承損傷振動信號中的幅值調變現象…………………..10
第四章 故障實例…………………………………………………..12
4.1 模態測試…………………………………………………..12
4.2 正常軸承之實驗分析……………………………………..12
4.3 軸承外環滾道表面點缺陷………………………………..13
4.4 軸承內環滾道表面點缺陷………………………………..14
4.5 軸承滾珠表面點缺陷……………………………………..15
第五章 專家系統…………………………………………………..17
5.1 專家系統之設計…………………………………………..17
5.2 建立診斷專家系統………………………………………..18
5.3 知識表示…………………………………………………..18
5.4 推理工具…………………………………………………..19
5.5 不確定推理………………………………………………..19
5.6 使用者界面………………………………………………..21
第六章 軸承損傷專家診斷系統實例……………………………..22
6.1 專家系統之建模軟體……………………………………..22
6.2 建立知識庫………………………………………………..22
6.3 軸承損傷專家診斷系統之診斷流程……………………...27
6.4 軸承診斷實例分析………………………………………..30
第七章 結論………………………………………………………..33
附錄一………………………………………………………………..34
參考文獻……………………………………………………………..36
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243 The Fundamental of Signal Analysis. The time, frequency, and modal domains are explained without rigorous mathematics. Provides a block-diagram level understanding of DSAs.
243-1 Effective Machinery Measurements using Dynamic Signal Analyzers.
243-3 The Fundamentals of Modal Testing. The basics of structural
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Peak and Envelope Analysis for Bearing Fault Detection.
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