Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems
The alignment accuracy and stability of shipborne electro-optical system are affected by external attitude disturbance and internal non-linear disturbance. Therefore, this study examined a new digital sliding mode control based on a novel reaching law with an n-order disturbance compensator to solve...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8846868/ |
| _version_ | 1818557572709351424 |
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| author | Jianqiang Zhang Yongkai Liu Fengjing Zhang Shijie Gao Chengshan Han |
| author_facet | Jianqiang Zhang Yongkai Liu Fengjing Zhang Shijie Gao Chengshan Han |
| author_sort | Jianqiang Zhang |
| collection | DOAJ |
| description | The alignment accuracy and stability of shipborne electro-optical system are affected by external attitude disturbance and internal non-linear disturbance. Therefore, this study examined a new digital sliding mode control based on a novel reaching law with an n-order disturbance compensator to solve this problem. Specially, the proposed novel reaching law was a chatter-free method, in which, as the switching gain was replaced by an adaptive function, chattering on the sliding surface tended to zero. For perturbed systems, the new sliding mode controller was able to guarantee a narrow quasi-sliding-mode domain and the ultimate width was the order of O(T<sup>3</sup>), such that the narrower the quasi-sliding-mode domain width was, the more robust toward nonlinear disturbances. Both mathematical calculations and simulations verified the convergence and stability of the new controller. Finally, based on a compound control strategy that combined feedforward control with a sliding mode control position loop and proportional-integral velocity loop control structure, shipborne equivalent dynamic target tracking experiments were performed. The results, compared with existing controllers, showed that the robustness of the new controller to nonlinear disturbances was stronger and the tracking system accuracy clearly improved, while the influence of sliding mode chattering on the system was avoided. |
| first_indexed | 2024-12-14T00:01:17Z |
| format | Article |
| id | doaj.art-d8ed66fdf1be4b1197a04bac19675071 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T00:01:17Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-d8ed66fdf1be4b1197a04bac196750712022-12-21T23:26:20ZengIEEEIEEE Access2169-35362019-01-01713987013988410.1109/ACCESS.2019.29427388846868Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical SystemsJianqiang Zhang0https://orcid.org/0000-0002-0658-5762Yongkai Liu1Fengjing Zhang2Shijie Gao3Chengshan Han4Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, ChinaAviation University of Air Force, Changchun, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, ChinaThe alignment accuracy and stability of shipborne electro-optical system are affected by external attitude disturbance and internal non-linear disturbance. Therefore, this study examined a new digital sliding mode control based on a novel reaching law with an n-order disturbance compensator to solve this problem. Specially, the proposed novel reaching law was a chatter-free method, in which, as the switching gain was replaced by an adaptive function, chattering on the sliding surface tended to zero. For perturbed systems, the new sliding mode controller was able to guarantee a narrow quasi-sliding-mode domain and the ultimate width was the order of O(T<sup>3</sup>), such that the narrower the quasi-sliding-mode domain width was, the more robust toward nonlinear disturbances. Both mathematical calculations and simulations verified the convergence and stability of the new controller. Finally, based on a compound control strategy that combined feedforward control with a sliding mode control position loop and proportional-integral velocity loop control structure, shipborne equivalent dynamic target tracking experiments were performed. The results, compared with existing controllers, showed that the robustness of the new controller to nonlinear disturbances was stronger and the tracking system accuracy clearly improved, while the influence of sliding mode chattering on the system was avoided.https://ieeexplore.ieee.org/document/8846868/Shipborne electro-optical systemnonlinear disturbancedigital sliding mode controlchatteringreaching lawdisturbance compensator |
| spellingShingle | Jianqiang Zhang Yongkai Liu Fengjing Zhang Shijie Gao Chengshan Han Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems IEEE Access Shipborne electro-optical system nonlinear disturbance digital sliding mode control chattering reaching law disturbance compensator |
| title | Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems |
| title_full | Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems |
| title_fullStr | Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems |
| title_full_unstemmed | Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems |
| title_short | Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems |
| title_sort | digital sliding mode control via a novel reaching law and application in shipborne electro optical systems |
| topic | Shipborne electro-optical system nonlinear disturbance digital sliding mode control chattering reaching law disturbance compensator |
| url | https://ieeexplore.ieee.org/document/8846868/ |
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