Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems

doi:10.1109/access.2019.2942738

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	Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems
	J.Q.Zhang; Y.K.Liu; F.J.Zhang; S.J.Gao; C.S.Han
	2019
发表期刊	Ieee Access
ISSN	2169-3536
卷号	7 页码:139870-139884
摘要	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-3), 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.
关键词	Shipborne electro-optical system,nonlinear disturbance,digital sliding,mode control,chattering,reaching law,disturbance compensator,chattering-free,quasi-sliding-mode domain,discrete-time-systems,feedback,Computer Science,Engineering,Telecommunications
DOI	10.1109/access.2019.2942738
收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/62813
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J.Q.Zhang,Y.K.Liu,F.J.Zhang,et al. Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems[J]. Ieee Access,2019,7:139870-139884.
APA	J.Q.Zhang,Y.K.Liu,F.J.Zhang,S.J.Gao,&C.S.Han.(2019).Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems.Ieee Access,7,139870-139884.
MLA	J.Q.Zhang,et al."Digital Sliding Mode Control via a Novel Reaching Law and Application in Shipborne Electro-Optical Systems".Ieee Access 7(2019):139870-139884.

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