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作者：Khong, Sei Zhen; Cantoni, Michael; Hara, Shinji; Kao, Chung-Yao
作者单位：National Sun Yat Sen University; University of Melbourne; Institute of Science Tokyo; Tokyo Institute of Technology
摘要：The robustness of instability is investigated for feedback interconnections of rational transfer functions, motivated by the relevance of such in the study of oscillatory dynamics. An analysis is presented in terms of normalized coprime factorizations and the L-2-gap metric. The main result is a necessary and sufficient condition for feedback instability to persist across a particular uncertainty set for one open-loop component of the interconnection, with the other component fixed. This uncer...
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作者：Wang, Yutian; Liu, Tengfei; Shim, Hyungbo; Rovithakis, George A.; Jiang, Zhong-Ping
作者单位：University of Cyprus; Northeastern University - China; Seoul National University (SNU); Aristotle University of Thessaloniki; New York University; New York University Tandon School of Engineering
摘要：This article contributes a Lyapunov formulation for prescribed performance controller designs. In particular, we first show that the closed-loop system of a typical class of prescribed performance control systems can be transformed into an interconnection of input-to-state practically stable (ISpS) subsystems characterized by ISpS-Lyapunov functions. Then, we take advantage of the gain-interconnections between the subsystems and construct a Lyapunov function for the closed-loop system. The pro...
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作者：Alghunaim, Sulaiman A.
作者单位：Kuwait University
摘要：Distributed optimization methods with local updates have recently attracted a lot of attention due to their potential to reduce the communication cost of distributed methods. In these algorithms, a collection of nodes performs several local updates based on their local data, and then, they communicate with each other to exchange estimate information. While there have been many studies on distributed local methods with centralized network connections, there has been less work on decentralized n...
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作者：Cao, Ye; Wang, Xinjun; Ma, Yajing; Cao, Jianfu; Song, Yongduan
作者单位：Xi'an Jiaotong University; Shandong Normal University; Nanjing University of Posts & Telecommunications; Chongqing University; Chongqing University
摘要：Most existing fault-tolerant control schemes either are contingent upon timely and accurate fault identification or need to be redesigned whenever the types/phases of actuator failures change, rendering the control design rather complex. In this work, a dynamic hardware redundancy technique with a performance-based trivial fault detector is proposed to accommodate multiple levels of actuator failures, upon which a unified performance-based fault-tolerant control scheme is developed irrespectiv...
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作者：Prasun, Parijat; Kamal, Shyam; Pandey, Sunidhi; Bartoszewicz, Andrzej; Ghosh, Sandip
作者单位：Indian Institute of Technology System (IIT System); Indian Institute of Technology BHU Varanasi (IIT BHU Varanasi); Lodz University of Technology
摘要：In this article, a minimum operator-based law for discrete-time sliding mode control is proposed, which stands between the Gao's reaching law and Utkin's reaching law, alleviating the limitations of both types, i.e., primarily chattering in the former and overly large control action in the latter case. The minimum operator-based discrete-time sliding mode control is designed for first-order and second-order perturbed systems. Further, a minimum operator-based twisting-like algorithm is develop...
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作者：Jones, Morgan
作者单位：University of Sheffield
摘要：what circumstances does the closeness of two functions imply the closeness of their respective sublevel sets? In this article, we answer this question by showing that if a sequence of functions converges strictly from above/below to a function, V , in the L-infinity (or L-1) norm then these functions yield a sequence sublevel sets that converge to the sublevel set of V with respect to the Hausdorff metric (or volume metric). Based on these theoretical results we propose sum-of-squares numerica...
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作者：Khazraei, Amir; Pfister, Henry D.; Pajic, Miroslav
作者单位：Duke University
摘要：We study the performance of perception-based control systems in the presence of attacks and provide methods for modeling and analysis of their resiliency to stealthy attacks on both physical and perception-based sensing. Specifically, we consider a general setup with a nonlinear affine physical plant controlled with a perception-based controller that maps both the physical [e.g., inertial measurement units (IMUs)] and perceptual (e.g., camera) sensing to the control input; the system is also e...
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作者：Ma, Xuehui; Zhang, Shiliang; Li, Yushuai; Qian, Fucai; Sun, Zhiyong; Huang, Tingwen
作者单位：Xi'an University of Technology; University of Oslo; Aalborg University; Eindhoven University of Technology; Shenzhen University of Advanced Technology
摘要：This article is concerned with the robust tracking control of linear uncertain systems, whose unknown system parameters and disturbances are bounded within ellipsoidal sets. We propose an adaptive robust control that can actively learn the ellipsoid sets. Particularly, our approach utilizes the ellipsoidal set-membership estimation in learning the ellipsoid sets, aiming at narrowing the uncertainty boundaries to reduce the conservativeness in robust control. To further improve the transient pe...
