{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T23:15:20Z","timestamp":1773011720281,"version":"3.50.1"},"reference-count":29,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2025,7,2]],"date-time":"2025-07-02T00:00:00Z","timestamp":1751414400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2025,7,2]],"date-time":"2025-07-02T00:00:00Z","timestamp":1751414400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62303178"],"award-info":[{"award-number":["62303178"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["19F19703"],"award-info":[{"award-number":["19F19703"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Circuit Theory &amp;amp; Apps"],"published-print":{"date-parts":[[2026,3]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>The control performance of a permanent magnet synchronous motor (PMSM) is significantly deteriorated when faced with unknown disturbances, such as model uncertainties, parameter variations, and external interferences. This paper proposes a model\u2010free fast integral terminal sliding mode control (MFITSMC) approach based on an extended super\u2010twisting sliding mode disturbance observer (ESTSMDO), referred to as the ESTSMDO\u2010based MFITSMC approach. First, a unique ultra\u2010local model (NULM) of the PMSM is developed that accounts for unknown disturbances. Then, the MFITSMC is formulated by integrating a fast integral terminal sliding mode surface with a switching control law. The speed loop controller is designed using the MFITSMC. The ESTSMDO is meant to precisely estimate unknown disturbances and subsequently input them into the MFITSMC controller. The ESTSMDO\u2010based MFITSMC approach mitigates chattering and improves the system's robustness to unanticipated disturbances. Finally, the simulation and experimental validation demonstrate that the dynamic response of the PMSM system is markedly enhanced, and the chattering associated with SMC is effectively reduced.<\/jats:p>","DOI":"10.1002\/cta.70049","type":"journal-article","created":{"date-parts":[[2025,7,3]],"date-time":"2025-07-03T00:20:08Z","timestamp":1751502008000},"page":"1572-1583","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Model\u2010Free Fast Integral Terminal Sliding Mode Control Based on Extended Super\u2010Twisting Sliding Mode Disturbance Observer for PMSM With Unknown Disturbances"],"prefix":"10.1002","volume":"54","author":[{"given":"Mengjie","family":"Qiao","sequence":"first","affiliation":[{"name":"College of Electrical and Information Engineering Hunan University of Technology  Zhuzhou China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4265-9631","authenticated-orcid":false,"given":"Kaihui","family":"Zhao","sequence":"additional","affiliation":[{"name":"College of Electrical and Information Engineering Hunan University of Technology  Zhuzhou China"},{"name":"School of Engineering Tokyo University of Technology  Hachioji Japan"}]},{"given":"Baling","family":"Fang","sequence":"additional","affiliation":[{"name":"College of Electrical and Information Engineering Hunan University of Technology  Zhuzhou China"}]},{"given":"Jinhua","family":"She","sequence":"additional","affiliation":[{"name":"School of Engineering Tokyo University of Technology  Hachioji Japan"}]},{"given":"Yishan","family":"Huang","sequence":"additional","affiliation":[{"name":"CRRC Electric Vehicle Co. 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