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作者：Katsoukis, Ilias; Rovithakis, George A.
作者单位：Aristotle University of Thessaloniki
摘要：We consider the problem of synchronizing the state of high order and relative degree two, nonlinear multiagent systems, in a leader-following scenario, with the leader dynamics being totally unknown to its followers. The agent dynamics has a full-entry and state-dependent control input matrix. In addition, all nonlinearities involved have unknown analytical expressions and, moreover, are affected by external additive disturbances. The proposed robust control protocol is distributed and of low ...
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作者：Ren, Kewei; Iwasaki, Tetsuya
作者单位：University of California System; University of California Los Angeles
摘要：When designing feedback controllers to achieve periodic movements, a reference trajectory generator for oscillations is an important component. Using autonomous oscillators to this effect, rather than directly crafting periodic signals, may allow for systematic coordination in a distributed manner and storage of multiple motion patterns within the nonlinear dynamics, with potential extensions to adaptive mode switching through sensory feedback. This article proposes a method for designing a di...
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作者：Cao, Zhiru; Wang, Zidong; Song, Jun; Niu, Yugang
作者单位：Shanghai University; Brunel University; Anhui University; Anhui University; East China University of Science & Technology
摘要：This article investigates the sampled-data sliding-mode control (SMC) problem for a class of uncertain systems with matched disturbances, where the sampling period switches among several different values in a random way and the system state is transmitted to the controller via a fading wireless channel. By applying the coordinate transformation and the input delay techniques, the underlying system with randomly switching sampling period is converted into a certain reduced-order system involvin...
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作者：Liu, Zhenwei; Saberi, Ali; Stoorvogel, Anton
作者单位：Northeastern University - China; Washington State University; University of Twente
摘要：In this article, we have focused on identifying a class of continuous- and discrete-time multi-agent systems for which a scale-free noncollaborative (i.e., scale-free fully distributed) linear protocol design is developed. We have identified conditions on agent models that enable us to design scalable linear protocols. Moreover, we show that these conditions are necessary if the agents are single input and single output. We also provide a complete design of scalable protocols for this class.
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作者：Zhao, Pan; Kolmanovsky, Ilya; Hovakimyan, Naira
作者单位：University of Alabama System; University of Alabama Tuscaloosa; University of Michigan System; University of Michigan; University of Illinois System; University of Illinois Urbana-Champaign
摘要：This article presents an adaptive reference governor (RG) framework for a linear system with matched nonlinear uncertainties that can depend on both time and states, subject to both state and input constraints. The proposed framework leverages an L-1 adaptive controller ( L-1 AC) that compensates for the uncertainties, and provides guaranteed transient performance in terms of uniform bounds on the error between actual states and inputs and those of a nominal (i.e., uncertainty-free) system. Th...
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作者：Yue, Dong; Deng, Chao; Wen, Changyun; Wang, Wei
作者单位：Nanjing University of Posts & Telecommunications; Nanyang Technological University; Beihang University; Beihang University
摘要：In this article, we study the finite-time distributed resilient tracking control problem for nonlinear multiagent systems under denial-of-service (DoS) attacks. To solve the problem, a new hierarchical control method is proposed, which includes a resilient distributed observation layer, a local performance improvement layer, and a decentralized tracking layer. Specifically, a novel model transformation method is first introduced in the resilient distributed observation layer to transform the r...
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作者：Anand, Sribalaji C.; Teixeira, Andre M. H.; Ahlen, Anders
作者单位：Uppsala University; Uppsala University
摘要：In this article, we address the problem of risk assessment of stealthy attacks on uncertain control systems. Considering the data injection attacks that aim at maximizing the impact while remaining undetected, we use the recently proposed output-to-output gain to characterize the risk associated with the impact of attacks under a limited system knowledge attacker. The risk is formulated using a well-established risk metric, namely the maximum expected loss. Under this setup, the risk assessmen...
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作者：Gong, Ping; Han, Qing-Long
作者单位：Guangdong University of Foreign Studies; Swinburne University of Technology
摘要：This article addresses the problem of distributed fixed-time optimization for heterogeneous second-order nonlinear multiagent systems with local time-varying cost functions. The objective is to cooperatively minimize a convex global time-varying cost function formed by a sum of local time-varying cost functions in a fixed time, where each local cost function is not necessarily required to be convex. A state-feedback distributed fixed-time optimization controller with an estimator-based distrib...
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作者：Parsa, Javad; Rojas, Cristian R.; Hjalmarsson, Hakan
作者单位：Royal Institute of Technology
摘要：One of the main problems in sparse representation in order to achieve accurate parameter estimation is the potentially large correlation between the regressors. The maximum absolute value of this correlation is called mutual coherence. The inverse of the mutual coherence controls approximately the number of nonzero parameters that can be recovered exactly from noise-free observations. In system identification, the observations are constructed from time-series data, which leads to that the colu...
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作者：Wu, Bofan; Peng, Zhaoxia; Wen, Guoguang; Huang, Tingwen; Rahmani, Ahmed
作者单位：Beihang University; Beijing Jiaotong University; Texas A&M University System; Texas A&M University College Station; Universite de Lille; Centrale Lille; Centre National de la Recherche Scientifique (CNRS); CNRS - Institute for Information Sciences & Technologies (INS2I)
摘要：In this article, we investigate a distributed constrained optimal formation matching problem for a large-scale multiagent system. A distributed formation matching algorithm for a large-scale multiagent system (DFMA-LSMAS) is proposed. The algorithm employs a distributed continuous-time strategy to deal with a minimal weight bipartite graph matching problem for the optimal matching relationship between each agent and each hole in the formation configuration. It prevents a centralized structure ...
