{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T06:54:10Z","timestamp":1777704850126,"version":"3.51.4"},"reference-count":39,"publisher":"SAGE Publications","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IFS"],"published-print":{"date-parts":[[2021,6,21]]},"abstract":"<jats:p>Gear fault vibration signals are commonly non-stationary, and useful fault information is often buried in heavy noise, which makes it difficult to extract gear fault features. How to select the suitable fault frequency bands is the key to gear fault diagnosis. To address the above problems, a method combining the improved minimum entropy deconvolution (MED) and accugram, named IMEDA, is proposed for extracting gear fault features. Firstly, a selection index based on permutation entropy (PE) and correlation coefficient is defined. Then, the optimal filter length can be effectively selected by the step-length searching method using the proposed index as objective function, and the improved MED is employed to preprocess the gear vibration signals. Finally, the accugram analysis is performed for the preprocessed signals to obtain the optimal frequency band, and the fault characteristic frequencies are extracted from the square envelope spectrum of the signals in the optimal band. The method is validated by gear experimental data with gear wear-out failure. The analysis results demonstrate that the proposed method owns superior effect by comparing with the fast kurtogram (FK), MED combined with FK (MED-FK), accugram and infogram.<\/jats:p>","DOI":"10.3233\/jifs-210405","type":"journal-article","created":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T04:52:52Z","timestamp":1620190372000},"page":"12265-12282","source":"Crossref","is-referenced-by-count":4,"title":["Fault feature extraction method of gear based on optimized minimum entropy deconvolution and accugram"],"prefix":"10.1177","volume":"40","author":[{"given":"Xianyou","family":"Zhong","sequence":"first","affiliation":[{"name":"Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance, China Three Gorges University, Yichang, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiang","family":"Gao","sequence":"additional","affiliation":[{"name":"Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance, China Three Gorges University, 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