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作者：Pu, Shi; Olshevsky, Alex; Paschalidis, Ioannis Ch
作者单位：Boston University; Boston University
摘要：This article is concerned with minimizing the average of is cost functions over a network, in which agents may communicate and exchange information with each other. We consider the setting where only noisy gradient information is available. To solve the problem, we study the distributed stochastic gradient descent (DSGD) method and perform a nonasymptotic convergence analysis. For strongly convex and smooth objective functions, in expectation, DSGD asymptotically achieves the optimal network-i...
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作者：Hu, Hongxiao; Gao, Bei; Xu, Liguang
作者单位：University of Shanghai for Science & Technology; Zhejiang University of Technology
摘要：In this article, the finite-time and fixed-time attractiveness problems are investigated for nonlinear impulsive systems. The aim of the proposed problems is to establish some general Lyapunov theorems and settling-time estimates for finite-time and fixed-time attractiveness of nonlinear impulsive systems by analysis technics. Moreover, some comparisons with the existing results are also given. The classical finite-time and fixed-time convergence theorems for nonlinear impulse-free systems are...
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作者：Yang, Guitao; Rezaee, Hamed; Serrani, Andrea; Parisini, Thomas
作者单位：Imperial College London; University System of Ohio; Ohio State University; University of Trieste; University of Cyprus
摘要：We propose a state estimation methodology using a network of distributed observers. We consider a scenario in which the local measurement at each node may not guarantee the system's observability. In contrast, the ensemble of all the measurements does ensure that the observability property holds. As a result, we design a network of observers such that the estimated state vector computed by each observer converges to the system's state vector by using the local measurement and the communicated ...
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作者：Delamer, Jean-Alexis; Givigi, Sidney
摘要：When multiple agents need to perform tasks that need cooperation, communication is necessary for coordination and also to assess completion. In this case, trust needs to be guaranteed, so agents know if others are following a common strategy. If communication is explicit, other agents, including agents that are not involved directly in the mission, can forge information and lead agents to believe that they are behaving according to the mission plan. Several methods have been proposed in the li...
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作者：Liu, Jason J. R.; Yang, Nachuan; Kwok, Ka-Wai; Lam, James
作者单位：University of Hong Kong; Hong Kong University of Science & Technology
摘要：This technical note investigates the positive consensus problem of multiagent systems with directed communication topologies, where all the agents have identical continuous-time positive linear dynamics. Existing works of such a problem mainly focus on the case, where networked communication topologies are of either undirected and incomplete graphs, or strongly connected directed graphs. In contrast to them, we study this problem in which the communication topologies of the multiagent system a...
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作者：Xiao, Wei; Belta, Calin
作者单位：Boston University
摘要：We approach the problem of stabilizing a dynamical system while optimizing a cost and satisfying safety constraints and control limitations. For (nonlinear) affine control systems and quadratic costs, it has been shown that control barrier functions (CBFs) guaranteeing safety and control Lyapunov functions (CLFs) enforcing convergence can be used to (conservatively) reduce the optimal control problem to a sequence of quadratic programs (QPs). Existing works in this category have two main limit...
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作者：Huang, Xiucai; Song, Yongduan
作者单位：Chongqing University
摘要：In this article, we first show that the main results claimed in the paper by Bikas and Rovithakis (2021) involve some errors as the selection conditions for the design parameters are not sufficient to ensure the boundedness of all the closed-loop signals, then we provide the corresponding corrections under the same controller, so that the underlying quantized control problem can be tackled.
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作者：Nikiforov, Vladimir; Gerasimov, Dmitry; Pashenko, Artem
作者单位：ITMO University
摘要：This article addresses the problem of transient performance improvement in adaptive backstepping design. A new modular design with a high-order tuner providing complete compensation of the adjustable parameters' time variations is proposed. The L-infinity performance bound for the state error is derived and verifies a better transient performance of the proposed controller compared to the known ones designed based on tuning functions and modular approach with first-order tuners.
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作者：Yan, Yuyue; Hayakawa, Tomohisa
作者单位：Institute of Science Tokyo; Tokyo Institute of Technology
摘要：The stability property of the loss-aversion-based noncooperative switched systems with quadratic payoffs is investigated. In this system, each agent adopts the lower sensitivity parameter in the myopic pseudo-gradient dynamics for the case of losing utility than gaining utility, and both system dynamics and switching events (conditions) are depending on agents' payoff functions. Sufficient conditions under which agents' state converges toward the Nash equilibrium are derived in accordance with...
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作者：Chaudhari, Aditya; Chakraborty, Debraj
作者单位：Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Bombay
摘要：In this article, a computationally efficient time-optimal feedback solution to the game of two cars, for the case where the pursuer is faster and more agile than the evader, is presented. The concept of continuous subsets of the reachable set is introduced to characterize the time-optimal pursuit-evasion game under feedback strategies. Using these subsets, it is shown that, if initially the pursuer is distant enough from the evader, then the feedback saddle point strategies for both the pursue...
