Adaptive Fixed‐Time Disturbance Observer Based Optimal Sliding Mode Control for Dynamic Positioning Ships With Uncertainties and External Disturbances.
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| Title: | Adaptive Fixed‐Time Disturbance Observer Based Optimal Sliding Mode Control for Dynamic Positioning Ships With Uncertainties and External Disturbances. |
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| Authors: | An, Shun1 (AUTHOR), Liu, Yang1 (AUTHOR), He, Yan1,2 (AUTHOR), Wang, Longjin1 (AUTHOR) wljwlj1984@126.com |
| Source: | Optimal Control - Applications & Methods. Sep2025, Vol. 46 Issue 5, p1932-1944. 13p. |
| Subjects: | Sliding mode control, Dynamic positioning systems, Adaptive control systems, Feedback control systems, Computer simulation, Robust statistics, Ecological disturbances |
| Abstract: | In this paper, an adaptive fixed‐time disturbance observer based optimal sliding mode control (AFTDO‐OSMC) strategy is presented for dynamic positioning ships affected by uncertainties and external disturbances. First, a control Lyapunov function based inverse optimal control (CLF‐IOC) law is designed for the nominal ship model. Then, to ensure the robustness of the designed CLF‐IOC law under uncertainties and external disturbances, an OSMC law is proposed by combining the SMC and CLF‐IOC, and an AFTDO is integrated to attenuate the effect of uncertainties and external disturbances. The developed AFTDO can guarantee the practical fixed‐time stability of estimation errors and needs no prior knowledge of the bound value of lumped uncertainties. With the aid of the developed AFTDO, the gain of discontinuous control part is reduced remarkably, and therefore the control chattering is alleviated. Finally, the effectiveness of the proposed control strategy is demonstrated by numerical simulations. [ABSTRACT FROM AUTHOR] |
| Copyright of Optimal Control - Applications & Methods is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 188068108 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Adaptive Fixed‐Time Disturbance Observer Based Optimal Sliding Mode Control for Dynamic Positioning Ships With Uncertainties and External Disturbances. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22An%2C+Shun%22">An, Shun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Yang%22">Liu, Yang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22He%2C+Yan%22">He, Yan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Longjin%22">Wang, Longjin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wljwlj1984@126.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Optimal+Control+-+Applications+%26+Methods%22">Optimal Control - Applications & Methods</searchLink>. Sep2025, Vol. 46 Issue 5, p1932-1944. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Sliding+mode+control%22">Sliding mode control</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+positioning+systems%22">Dynamic positioning systems</searchLink><br /><searchLink fieldCode="DE" term="%22Adaptive+control+systems%22">Adaptive control systems</searchLink><br /><searchLink fieldCode="DE" term="%22Feedback+control+systems%22">Feedback control systems</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Robust+statistics%22">Robust statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Ecological+disturbances%22">Ecological disturbances</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In this paper, an adaptive fixed‐time disturbance observer based optimal sliding mode control (AFTDO‐OSMC) strategy is presented for dynamic positioning ships affected by uncertainties and external disturbances. First, a control Lyapunov function based inverse optimal control (CLF‐IOC) law is designed for the nominal ship model. Then, to ensure the robustness of the designed CLF‐IOC law under uncertainties and external disturbances, an OSMC law is proposed by combining the SMC and CLF‐IOC, and an AFTDO is integrated to attenuate the effect of uncertainties and external disturbances. The developed AFTDO can guarantee the practical fixed‐time stability of estimation errors and needs no prior knowledge of the bound value of lumped uncertainties. With the aid of the developed AFTDO, the gain of discontinuous control part is reduced remarkably, and therefore the control chattering is alleviated. Finally, the effectiveness of the proposed control strategy is demonstrated by numerical simulations. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Optimal Control - Applications & Methods is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/oca.3299 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1932 Subjects: – SubjectFull: Sliding mode control Type: general – SubjectFull: Dynamic positioning systems Type: general – SubjectFull: Adaptive control systems Type: general – SubjectFull: Feedback control systems Type: general – SubjectFull: Computer simulation Type: general – SubjectFull: Robust statistics Type: general – SubjectFull: Ecological disturbances Type: general Titles: – TitleFull: Adaptive Fixed‐Time Disturbance Observer Based Optimal Sliding Mode Control for Dynamic Positioning Ships With Uncertainties and External Disturbances. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: An, Shun – PersonEntity: Name: NameFull: Liu, Yang – PersonEntity: Name: NameFull: He, Yan – PersonEntity: Name: NameFull: Wang, Longjin IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 01432087 Numbering: – Type: volume Value: 46 – Type: issue Value: 5 Titles: – TitleFull: Optimal Control - Applications & Methods Type: main |
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