{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:20:56Z","timestamp":1760242856759,"version":"build-2065373602"},"reference-count":29,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2016,9,13]],"date-time":"2016-09-13T00:00:00Z","timestamp":1473724800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation  of China","award":["51205427"],"award-info":[{"award-number":["51205427"]}]},{"name":"Equipment Advanced Research Foundation","award":["9140A27020115JB35071"],"award-info":[{"award-number":["9140A27020115JB35071"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Kurtograms have been verified to be an efficient tool in bearing fault detection and diagnosis because of their superiority in extracting transient features. However, the short-time Fourier Transform is insufficient in time-frequency analysis and kurtosis is deficient in detecting cyclic transients. Those factors weaken the performance of the original kurtogram in extracting weak fault features. Correlated Kurtosis (CK) is then designed, as a more effective solution, in detecting cyclic transients. Redundant Second Generation Wavelet Packet Transform (RSGWPT) is deemed to be effective in capturing more detailed local time-frequency description of the signal, and restricting the frequency aliasing components of the analysis results. The authors in this manuscript, combining the CK with the RSGWPT, propose an improved kurtogram to extract weak fault features from bearing vibration signals. The analysis of simulation signals and real application cases demonstrate that the proposed method is relatively more accurate and effective in extracting weak fault features.<\/jats:p>","DOI":"10.3390\/s16091482","type":"journal-article","created":{"date-parts":[[2016,9,13]],"date-time":"2016-09-13T10:10:00Z","timestamp":1473761400000},"page":"1482","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":34,"title":["Weak Fault Feature Extraction of Rolling Bearings Based on an Improved Kurtogram"],"prefix":"10.3390","volume":"16","author":[{"given":"Xianglong","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering, Academy of Armored Forces Engineering, Beijing 100072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fuzhou","family":"Feng","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Academy of Armored Forces Engineering, Beijing 100072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bingzhi","family":"Zhang","sequence":"additional","affiliation":[{"name":"Beijing Special Vehicle Research Institute, Beijing 100072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2016,9,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"100","DOI":"10.1016\/j.ymssp.2015.04.021","article-title":"Rolling element bearing diagnostics using the Case Western Reserve University data: A benchmark study","volume":"64\u201365","author":"Smith","year":"2015","journal-title":"Mech. 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