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Empirical Mode Decomposition (EMD) of the gear box gear fault diagnosis technology

tion. Inordertorecognizethegenericvibrationmodeofthecomponent, thispaperdiscussesdiffer-enceetweentraditionalsignalprocessingtechniqueandempiricalmodedecomposition (EMD) foragearbox, anddetailsinthetheoryofEMDanditsmathematicalandphysicalsignificance. Usingvibrationaccelerationdatasetsofthegearbox,[link widoczny dla zalogowanych], in-trinsicmodefunctions (IMFs) andtheirpowerspectrumdensity (PSD) extractedwithEMDandFourieranalysticaltech-niques. Furthermore. theeffectivegearfaultindexesoftheIMFandPSDon216frequencyband (IMFPSD216) basedonthe2ndIMFcomponents (IMF2) anditsPSD,[link widoczny dla zalogowanych], andtheIMFusingfilter (IMFFLT) basedonIMF2anditsfilteredstatisticalsig-nal, aregiven. Asuccessfuldiagnosisofthegearfaultisobtainedusingtheseindexes. Keywords: gearbox; faultdiagnosis; empiricalmodedecomposition; intrinsicmodefunction first author Chen M, Ephemera strigata division,[link widoczny dla zalogowanych], serving Ph.D., January 1968, 1O students. Phone: (020) 87112482; E-mail: mezhchen @ scut. edu. cnlj ◆ Sichuan I ◆ ◆ _l ¨ ◆ ◆ Chuan Chuan l ◆ ... l ◆ _l ¨ ◆ Sichuan l ◆ ◆ ... ◆ Il ¨ ◆ ◆ ◆ IIIH) j ◆ Il ¨ ◆ Sichuan l ◆ Ⅲ I ◆ ... l ◆ ... ◆ ... l ◆ Il ¨ ◆ ... l ◆ _I ¨ ◆ _I ¨ ◆ _l ¨ ◆ ... l ◆ ... j ◆ Sichuan l ◆ lIll ~ _. jlIH) 'IIII ~) Vibration Engineering Society of China to participate in the group of Chinese Association for Science Week 2003 Annual Conference in the implementation of strategies and sustainable development through science and education strategies,[link widoczny dla zalogowanych], establish and perfect the process of national innovation system, China Association for Science in the organization to give full play to the main academic exchanges channel, established an annual academic years of unionism. 2003 Annual Conference scheduled for September 13 to 16 held in Shenyang City. The purpose of the meeting is: Theory and Through academic exchanges, scientific and technological progress and demonstrate academic point of view, for the development of advanced productive forces and advanced culture,[link widoczny dla zalogowanych], and promoting socialist material civilization and spiritual civilization and contribute to the building. China Association for Science in February 2003 issued the Society accordance with the notification requirements, assembly members in the abstract. 1O days ended in May, received a total of nine abstracts. Vibration Engineering Society of China delegation to participate in the proposed meeting of experts reported in 9 individual registration form and abstract registration form, will form the chairman of the ROTOR groups headed by academicians attended the meeting. (Office News)

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