{"title":"Observer-Based Practically Prescribed-Time Attitude Control for Flexible Spacecraft","authors":"Zhi Li, Ying Zhang, Ai-Guo Wu","doi":"10.1002/rnc.7849","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>In this paper, the practically prescribed-time attitude stabilization problem for flexible spacecraft with unknown disturbances is investigated. By designing an extended modal observer, the flexible vibrations and disturbances are compensated. Compared with some existing results on the flexible modal observers, an appealing feature in the current design is that the estimation errors of flexible vibrations converge faster. To establish the practically prescribed-time control scheme, a state-scaling transformation is introduced by time-varying functions. Additionally, with the aid of the presented observer and an adaptive law, the attitude achieves practically prescribed-time stability. At last, numerical simulations are presented to show the effectiveness of the proposed control method.</p>\n </div>","PeriodicalId":50291,"journal":{"name":"International Journal of Robust and Nonlinear Control","volume":"35 8","pages":"3370-3382"},"PeriodicalIF":3.2000,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Robust and Nonlinear Control","FirstCategoryId":"94","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/rnc.7849","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"AUTOMATION & CONTROL SYSTEMS","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, the practically prescribed-time attitude stabilization problem for flexible spacecraft with unknown disturbances is investigated. By designing an extended modal observer, the flexible vibrations and disturbances are compensated. Compared with some existing results on the flexible modal observers, an appealing feature in the current design is that the estimation errors of flexible vibrations converge faster. To establish the practically prescribed-time control scheme, a state-scaling transformation is introduced by time-varying functions. Additionally, with the aid of the presented observer and an adaptive law, the attitude achieves practically prescribed-time stability. At last, numerical simulations are presented to show the effectiveness of the proposed control method.
期刊介绍：
Papers that do not include an element of robust or nonlinear control and estimation theory will not be considered by the journal, and all papers will be expected to include significant novel content. The focus of the journal is on model based control design approaches rather than heuristic or rule based methods. Papers on neural networks will have to be of exceptional novelty to be considered for the journal.
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