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- 저자 : M. F. M. YUNOH (검색결과 1 건)
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FATIGUE FEATURES EXTRACTION OF ROAD LOAD TIMEDATA USING THE S-TRANSFORM
S. ABDULLAH,C. K. E. NIZWAN,M. F. M. YUNOH,M. Z. NUAWI,Z. M. NOPIAH 한국자동차공학회 2013 International journal of automotive technology Vol.14 No.5
This paper presents the algorithm development of a new fatigue data editing technique using S-T approach. Ingeneral, the S-transform (S-T) is a time-frequency spectral localization method which performs a multi-resolution analysis onsignal. This method represents a better time-frequency resolution especially for non-stationary signal analysis. This techniquewas developed to produce shortened fatigue data for fatigue durability testing. The S-T method was applied to detect thedamaging events contained in the fatigue signals due to high S-T spectrum location. The damaging events were extracted froman original fatigue signal to produce the shortened edited signal which has equivalent fatigue damage. Three types of road loadfatigue data were used for simulation purpose, pave track, highway and country road. In this study, an algorithm wasdeveloped, to detect the damaging events in the original fatigue signal. The algorithm can be used to extract the fatiguedamaging events and these events were combined in order to produce a new edited signal which neglect the low amplitudecycles. The edited signal consists of the majority of the original fatigue damage in the shortened signal with 15-25% timereduction. Thus, it has been suggested that this shortened signal can then be used in the laboratory fatigue testing for thepurpose of accelerated fatigue testing.
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