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作者：Heijmans, Stefan H. J.; Postoyan, Romain; Nesic, Dragan; Heemels, W. P. Maurice H.
作者单位：Eindhoven University of Technology; Universite de Lorraine; Centre National de la Recherche Scientifique (CNRS); University of Melbourne
摘要：A popular design framework for networked control systems (NCSs) is the emulation-based approach combined with Lyapunov-based analysis techniques for hybrid systems. In virtually all papers that use this framework, bounds in terms of the maximal allowable transmission interval (MATI) are provided to guarantee stability, and performance properties of the NCS. However, having only such a MATI condition is rather restrictive, and unrealistic in practice due to various network effects such as packe...
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作者：Bujarbaruah, Monimoy; Zhang, Xiaojing; Tanaskovic, Marko; Borrelli, Francesco
作者单位：University of California System; University of California Berkeley
摘要：This article deals with the problem of formulating an adaptive model-predictive control strategy for constrained uncertain systems. We consider a linear system in the presence of bounded time-varying additive uncertainty. The uncertainty is decoupled as the sum of a process noise with known bounds and a time-varying offset that we wish to identify. The time-varying offset uncertainty is assumed unknown pointwise in time. Its domain, called the feasible parameter set, and its maximum rate of ch...
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作者：Fosson, Sophie M.
作者单位：Polytechnic University of Turin
摘要：The development of online algorithms to track time-varying systems has drawn a lot of attention in the last years, in particular in the framework of online convex optimization. Meanwhile, sparse time-varying optimization has emerged as a powerful tool to deal with widespread applications, ranging from dynamic compressed sensing to parsimonious system identification. In most of the literature on sparse time-varying problems, some prior information on the system's evolution is assumed to be avai...
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作者：Maros, Marie; Jalden, Joakim
作者单位：Royal Institute of Technology; Purdue University System; Purdue University
摘要：In this article, we consider a distributed convex optimization problem over time-varying undirected networks. We propose a dual method, primarily averaged network dual ascent (PANDA), that is proven to converge R-linearly to the optimal point given that the agents' objective functions are strongly convex and have Lipschitz continuous gradients. Like dual decomposition, PANDA requires half the amount of variable exchanges per iterate of methods based on DIGing, and can provide with practical im...
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作者：Aleixo, Jose Carlos; Rocha, Paula
作者单位：Universidade da Beira Interior; Universidade da Beira Interior; Universidade do Porto; Universidade do Porto
摘要：This article addresses the realization of linear periodic input/output (i/o) behaviors. Given a periodic behavior, we obtain its lifted time-invariant version, and construct a behavioral time-invariant (state-space) realization of the lifted behavior. Finally, we recover a periodic (state-space) realization of the periodic behavior based on the obtained time-invariant realization.
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作者：Fang, Xu; Li, Xiaolei; Xie, Lihua
作者单位：Nanyang Technological University
摘要：This article investigates the localization problem of a network in 2-D and 3-D spaces given the positions of anchor nodes in a global frame and internode relative measurements in local coordinate frames. It is assumed that the local frames of different nodes have different unknown orientations. First, an angle-displacement rigidity theory is developed, which can be used to localize all the free nodes by the known positions of the anchor nodes and local relative measurements (local relative pos...
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作者：Huang, Yi-Bo; He, Yong; An, Jianqi; Wu, Min
作者单位：China University of Geosciences
摘要：To derive a less conservative stability criterion via Lyapunov-Krasovskii functional (LKF) method, in previous literature, multiple integral terms are usually introduced into the construction of LKFs. This article generalizes the results of previous literature by proposing a polynomial-type LKF, which contains the LKFs with multiple integral terms as special cases. In addition, a Jacobi-Bessel inequality is presented to bound the derivative of such LKF. As a result, an improved stability crite...
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作者：Wang, Ji; Krstic, Miroslav
作者单位：University of California System; University of California San Diego
摘要：Motivated by an engineering application in brake control of cable mining elevators, where the dynamics consist of a brake, a shock absorber, a time-varying-length cable, and a cage, we address a theoretical problem of control of a particular class of coupled hyperbolic PDEs sandwiched between a nonlinear ODE on the actuated side and a linear ODE on the opposite side, with a PDE domain that is time-varying. A state-feedback controller entering a single ODE state is designed to exponentially sta...
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作者：Pereira, Ricardo; Rocha, Paula; Ntogramatzidis, Lorenzo
作者单位：Universidade de Aveiro; Universidade do Porto; Curtin University
摘要：In this article, we study the problem of estimation in the presence of disturbances within the context of the behavioral approach developed by J.C. Willems. For this purpose, we use the behavioral theory of observers introduced by Valcher, Willems, Trentelman, and Trumpf, combined with the notions of behavioral invariance, conditioned invariance, and behavioral detectability subspaces. With these tools, we provide necessary and sufficient conditions for the solvability of the aforementioned pr...
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作者：Shen, Dong; Qu, Ganggui; Yu, Xinghuo
作者单位：Renmin University of China; Beijing University of Chemical Technology; Royal Melbourne Institute of Technology (RMIT)
摘要：With the wide use of networks in repetitive systems, channels between a plant and a controller may experience random fading, which is a common problem in long-distance wireless communication. However, the control problem over fading channels is far from resolved. In this article, we investigate learning control over fading channels to gradually improve tracking performance. We observe that the effect of fading on input transmission greatly compromises tracking ability in practical implementati...
