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Title: A mission synthesis algorithm for editing variable amplitude fatigue signals
Authors: Giacomin, J
Abdullah, S
Yates, J R
Issue Date: 2004
Publisher: EMAS
Citation: International Conference on Engineering Structural Integrity Assessment (ESIA7), Manchester, United Kingdom, 20-21st Oct 2004
Abstract: This paper presents a wavelet-based fatigue data editing algorithm, known as Wavelet Bump Extraction (WBE), to summarise long record of fatigue loadings. The key point of this algorithm is to produce a shorter time history (mission signal) that retains the majority of the original fatigue damage whilst preserving cycle sequence information. In WBE, features or bumps are identified in characteristic frequency bands using the Daubechies’ wavelet transform. Comparison of the fatigue life between the original and mission signals was performed to validate the algorithm. The fatigue life was predicted using a variable amplitude fatigue damage model and the results showed a good correlation between the damage caused by the original and mission signals. Finally, the findings suggest that WBE is a suitable approach for producing a shortened mission signal for accelerated fatigue testing.
Appears in Collections:Design
Dept of Design Research Papers

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