{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T04:22:40Z","timestamp":1774844560173,"version":"3.50.1"},"reference-count":33,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2020,2,11]],"date-time":"2020-02-11T00:00:00Z","timestamp":1581379200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Due to the importance of sensors in railway traction drives availability, sensor fault diagnosis has become a key point in order to move from preventive maintenance to condition-based maintenance. Most research works are limited to sensor fault detection and isolation, but only a few of them analyze the types of sensor faults, such as offset or gain, with the aim of reconfiguring the sensor in order to implement a fault tolerant system. This article is based on a fusion of model-based and data-driven techniques. First, an observer-based approach, using a Sliding Mode observer, is utilized for sensor fault reconstruction in real time. Then, once the fault is detected, a time window of sensor measurements and sensor fault reconstruction is sent to the remote maintenance center for fault evaluation. Finally, an offline processing is carried out to discriminate between gain and offset sensor faults, in order to get a maintenance decision-making to reconfigure the sensor during the next train stop. Fault classification is done by means of histograms and statistics. The technique here proposed is applied to the DC-link voltage sensor in a railway traction drive and is validated in a hardware-in-the-loop platform.<\/jats:p>","DOI":"10.3390\/s20040962","type":"journal-article","created":{"date-parts":[[2020,2,11]],"date-time":"2020-02-11T11:45:30Z","timestamp":1581421530000},"page":"962","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["A Hybrid Sensor Fault Diagnosis for Maintenance in Railway Traction Drives"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2508-3469","authenticated-orcid":false,"given":"Fernando","family":"Garramiola","sequence":"first","affiliation":[{"name":"Faculty of Engineering, Mondragon Unibertsitatea, 20500 Arrasate-Mondrag\u00f3n, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6863-1755","authenticated-orcid":false,"given":"Javier","family":"Poza","sequence":"additional","affiliation":[{"name":"Faculty of Engineering, Mondragon Unibertsitatea, 20500 Arrasate-Mondrag\u00f3n, Spain"}]},{"given":"Patxi","family":"Madina","sequence":"additional","affiliation":[{"name":"Faculty of Engineering, Mondragon Unibertsitatea, 20500 Arrasate-Mondrag\u00f3n, Spain"}]},{"given":"Jon","family":"del Olmo","sequence":"additional","affiliation":[{"name":"Faculty of Engineering, Mondragon Unibertsitatea, 20500 Arrasate-Mondrag\u00f3n, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9682-102X","authenticated-orcid":false,"given":"Gaizka","family":"Ugalde","sequence":"additional","affiliation":[{"name":"Faculty of Engineering, Mondragon Unibertsitatea, 20500 Arrasate-Mondrag\u00f3n, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2020,2,11]]},"reference":[{"key":"ref_1","unstructured":"ISO 13374-1:2003 (2003). 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