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作者：Mulagaleti, Sampath Kumar; Bemporad, Alberto; Zanon, Mario
作者单位：IMT School for Advanced Studies Lucca
摘要：Linear models with additive unknown-but-bounded input disturbances are extensively used to model uncertainty in robust control system design. Typically, the disturbance set is either assumed to be known a priori or estimated from data through set-membership identification. However, the problem of computing a suitable input disturbance set in case the set of possible output values is assigned a priori has received relatively little attention. This problem arises in many contexts, such as in sup...
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作者：Varma, Vineeth Satheeskumar; Postoyan, Romain; Quevedo, Daniel E.; Morarescu, Irinel-Constantin
作者单位：Centre National de la Recherche Scientifique (CNRS); Universite de Lorraine; Queensland University of Technology (QUT)
摘要：We present an emulation-based controller and transmission policy design procedure for nonlinear wireless networked control systems. The objective is to ensure the stability of the closed-loop system, in a stochastic sense, together with given control performance, while minimizing the average power used for communications. The controller is designed by emulation, i.e., ignoring the network, and the transmission power is given by threshold policies. These policies involve waiting a given amount ...
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作者：Alpago, Daniele; Zorzi, Mattia; Ferrante, Augusto
作者单位：University of Padua
摘要：The positive link prediction problem is formulated in a system identification framework: We consider dynamic graphical models for autoregressive moving-average (ARMA) Gaussian random processes. For the identification of the parameters, we model our network on two different time scales: A quicker one, over which we assume that the process representing the dynamics of the agents can be considered to be stationary, and a slower one in which the model parameters may vary. The latter accounts for t...
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作者：Wu, Xuyang; Lu, Jie
作者单位：Royal Institute of Technology; ShanghaiTech University
摘要：This article investigates solving convex composite optimization on an undirected network, where each node, privately endowed with a smooth component function and a nonsmooth one, is required to minimize the sum of all the component functions throughout the network. To address such a problem, a general approximate method of multipliers (AMM) is developed, which attempts to approximate the method of multipliers by virtue of a surrogate function with numerous options. We then design the possibly ...
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作者：Bizyaeva, Anastasia; Franci, Alessio; Leonard, Naomi Ehrich
作者单位：Princeton University; Universidad Nacional Autonoma de Mexico
摘要：We propose a continuous-time multioption nonlinear generalization of classical linear weighted-average opinion dynamics. Nonlinearity is introduced by saturating opinion exchanges, and this is enough to enable a significantly greater range of opinion-forming behaviors with our model as compared to existing linear and nonlinear models. For a group of agents that communicate opinions over a network, these behaviors include multistable agreement and disagreement, tunable sensitivity to input, rob...
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作者：Cai, Jianping; Wen, Changyun; Xing, Lantao; Yan, Qiuzhen
作者单位：Zhejiang University of Water Resources and Electric Power; Nanyang Technological University; Shandong University
摘要：In this article, a decentralized adaptive control scheme is proposed based on backstepping techniques for a class of uncertain interconnected systems with unknown modeling errors and interactions. Unlike existing results, the functions bounding modeling errors and interactions are not required to meet the triangular condition. Namely, such functions are allowed to depend on all the states of the interconnected system. It is shown that the proposed adaptive control scheme can ensure all signals...
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作者：Lorenzetti, Pietro; Weiss, George
作者单位：Tel Aviv University
摘要：This article presents an antiwindup propor- tional-integral (PI) controller, using a saturating integrator, for a single-input and single-output (SISO) stable nonlinear plant, whose steady-state input-output map is increasing. We prove that, under reasonable assumptions, there exists an upper bound on the controller gain such that for any constant reference input, the corresponding equilibrium point of the closed-loop system is exponentially stable, with a large region of attraction. When the ...
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作者：Zhu, Yang; Fridman, Emilia; Oliveira, Tiago Roux
作者单位：Zhejiang University; Tel Aviv University; Universidade do Estado do Rio de Janeiro
摘要：This article proposes a constructive method for sampled-data extremum seeking (ES) with square wave dithers and constant delays, by using two time-delay approaches: one to averaging and the other to sampled-data control. We consider gradient-based ES for static maps which are of quadratic forms. By transforming the ES system to the time-delay system, we have developed a stability analysis via a Lyapunov-Krasovskii method. We derive the practical stability conditions in terms of linear matrix i...
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作者：Nowicki, Marcin; Respondek, Witold
作者单位：Poznan University of Technology; Lodz University of Technology
摘要：We present a new type of feedback linearization that is tailored for mechanical control systems. We call it mechanical feedback linearization. Its basic feature is the preservation of the mechanical structure of the system. For mechanical systems with a scalar control, we formulate necessary and sufficient conditions that are verifiable using differentiations and algebraic operations only. We illustrate our results with several examples.
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作者：Saeki, Masami
作者单位：Hiroshima University
摘要：We study the model matching problem of determining a feedforward controller for a multi-input-multi-output (MIMO) linear time-invariant plant and a reference model. In this article, we propose a model matching method for the outer of the plant square transfer function, in which the singular values of the frequency response of the control system are sufficiently close to those of the reference model. The model matching method is provided for both continuous-time and discrete-time plants. The di...
