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作者：Silm, Haik; Ushirobira, Rosane; Efimov, Denis; Fridman, Emilia; Richard, Jean-Pierre; Michiels, Wim
作者单位：KU Leuven; Inria; Universite de Lille; Centre National de la Recherche Scientifique (CNRS); ITMO University; Tel Aviv University
摘要：The distributed estimation problem is solved for continuous-time observer nodes that obtain real-time measurements but communicate with their neighbors over a communication network. To this end, the digital communication between the observer nodes is modeled by the time-delay approach where variable sampling intervals, transmission delays, and packet dropouts are taken into account. An LMI for the design of the observer gains is derived using Halanay's inequality, the feasibility of which guar...
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作者：Sarrafan, Neda; Zarei, Jafar
作者单位：Shiraz University of Technology; University of Windsor
摘要：This article is concerned with the leader-follower consensus tracking problem for multiagent systems with nonholonomic high-order chained-form dynamics subject to external disturbances. A novel distributed and bounded observer is first developed for each follower to estimate the leader information in a finite time. Then, a bounded fast terminal sliding-mode control protocol is constructed for each follower to track the estimated leader's states leading to the fast convergence performance as we...
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作者：Xie, Siyu; Zhang, Yaqi; Guo, Lei
作者单位：Wayne State University; Chinese Academy of Sciences; Academy of Mathematics & System Sciences, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
摘要：In this article, we consider a least-squares (LS)-based distributed algorithm build on a sensor network to estimate an unknown parameter vector of a dynamical system, where each sensor in the network has partial information only but is allowed to communicate with its neighbors. Our main task is to generalize the well-known theoretical results on the traditional LS to the current distributed case by establishing both the upper bound of the accumulated regrets of the adaptive predictor and the c...
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作者：Mitra, Aritra; Richards, John A.; Sundaram, Shreyas
作者单位：Purdue University System; Purdue University; United States Department of Energy (DOE); Sandia National Laboratories
摘要：We study a setting where a group of agents, each receiving partially informative private signals, seek to collaboratively learn the true underlying state of the world (from a finite set of hypotheses), which generates their joint observation profiles. To solve this problem, we propose a distributed learning rule that differs fundamentally from existing approaches, in that it does not employ any form of belief-averaging. Instead, agents update their beliefs based on a min-rule. Under standard a...
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作者：Wang, Shimin; Meng, Xiangyu
作者单位：University of Alberta; Louisiana State University System; Louisiana State University
摘要：In this article, the problem of simultaneous leader-following consensus and parameter estimation is studied for a class of multiagent systems subject to an uncertain leader system. The leader system is described by a sum of sinusoids with unknown amplitudes, frequencies, and phases. A fully distributed adaptive observer is established for each agent to estimate the unknown frequencies of the leader without using any global information. It is shown that if the signal of the leader is sufficient...
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作者：Katewa, Vaibhav; Pasqualetti, Fabio
作者单位：University of California System; University of California Riverside; Indian Institute of Science (IISC) - Bangalore; Indian Institute of Science (IISC) - Bangalore
摘要：The minimum-gain eigenvalue assignment/pole placement problem (MGEAP) is a classical problem in linear time-invariant systems with static state feedback. In this article, we study the MGEAP when the state feedback has arbitrary sparsity constraints. We formulate the sparse MGEAP problem as an equality-constrained optimization problem and present an analytical characterization of its locally optimal solution in terms of eigenvector matrices of the closed-loop system. This result is used to prov...
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作者：Li, Sen; Shetty, Akhil; Poolla, Kameshwar; Varaiya, Pravin
作者单位：Hong Kong University of Science & Technology; University of California System; University of California Berkeley
摘要：In this article, we study the problem of procuring diverse resources in a forward market to cover a set E of uncertain demand signals e. We consider two scenarios: 1) e is revealed all at once by an oracle and 2) e reveals itself causally. Each scenario induces an optimal procurement cost. The ratio between these two costs is defined as the price of causality. It captures the additional cost of not knowing the future values of the uncertain demand signal. We consider two application contexts: ...
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作者：Jin, Junyang; Yuan, Ye; Goncalves, Jorge
作者单位：University of Luxembourg; Huazhong University of Science & Technology; University of Cambridge
摘要：Network inference has been attracting increasing attention in several fields, notably systems biology and biomedicine. Indeed, one of our biggest challenges is to uncover and understand complex molecular networks behind cells and organisms. A network is mainly characterized by its topology and internal dynamics. In particular, sparse topologies with stable dynamics are properties present in most real-world networks. Moreover, experiments typically measure a partial set of nodes. Linear systems...
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作者：Ning, Boda; Han, Qing-Long; Zuo, Zongyu
作者单位：Swinburne University of Technology; Swinburne University of Technology; Beihang University
摘要：This article is concerned with bipartite consensus tracking for second-order multiagent systems with signed directed graphs. A time-varying function-based preset-time approach is proposed to realize the convergence in predetermined time. First, a class of time-varying functions with generalized properties are presented. Second, two time-varying function-based auxiliaries and a corresponding manifold are constructed. Under a structurally balanced and strongly connected graph, a time-varying fun...
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作者：Chen, Wei; Wang, Dan; Liu, Ji; Chen, Yongxin; Khong, Sei Zhen; Basar, Tamer; Johansson, Karl H.; Qiu, Li
作者单位：Peking University; Peking University; Hong Kong University of Science & Technology; State University of New York (SUNY) System; Stony Brook University; University System of Georgia; Georgia Institute of Technology; University of Illinois System; University of Illinois Urbana-Champaign; Royal Institute of Technology; University of Melbourne; Lund University; University of Minnesota System; University of Minnesota Twin Cities; University of Hong Kong
摘要：Signed graphs have appeared in a broad variety of applications, ranging from social networks to biological networks, from distributed control and computation to power systems. In this article, we investigate spectral properties of signed Laplacians for undirected signed graphs. We find conditions on the negative weights under which a signed Laplacian is positive semidefinite via the Kron reduction and multiport network theory. For signed Laplacians that are indefinite, we characterize their in...
