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

doi:10.1109/access.2019.2942738

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	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
刊名	Ieee Access
	2019
卷号	7 页码:139870-139884
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
ISSN号	2169-3536
DOI	10.1109/access.2019.2942738
英文摘要	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.
语种	英语
内容类型	期刊论文
源URL	[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.