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作者：Kishida, Masako; Nagahara, Masaaki
作者单位：Research Organization of Information & Systems (ROIS); National Institute of Informatics (NII) - Japan; University of Kitakyushu
摘要：With the view of risks, this article deals with the problems of maximum hands-off control that aims at minimizing the length of nonzero control input. More specifically, we consider stochastic systems and seek sparse control inputs that bring the system state to a ball centered at the origin, such that the expected value of the states that are further than a given threshold from the origin is small, thus minimizing the risk that the system state is outside of the ball. To deal with this proble...
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作者：Tahirovic, Adnan; Astolfi, Alessandro
作者单位：University of Sarajevo; Imperial College London; Sapienza University Rome
摘要：We propose a novel strategy to construct optimal controllers for continuous-time nonlinear systems by means of linear-like techniques, provided that the optimal value function is differentiable and quadratic-like. This assumption covers a wide range of cases and holds locally around an equilibrium under mild assumptions. The proposed strategy does not require solving the Hamilton-Jacobi-Bellman equation, i.e., a nonlinear partial differential equation, which is known to be hard or impossible t...
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作者：Kohler, Johannes; Zeilinger, Melanie N.; Gruene, Lars
作者单位：Swiss Federal Institutes of Technology Domain; ETH Zurich; University of Bayreuth
摘要：We provide a stability and performance analysis for nonlinear model predictive control (NMPC) schemes subject to input constraints. Given an exponential stabilizability and detectability condition w.r.t. the employed state cost, we provide a sufficiently long prediction horizon to ensure asymptotic stability and a desired performance bound w.r.t. the infinite-horizon optimal controller. Compared to existing results, the provided analysis is applicable to positive semidefinite (detectable) cost...
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作者：Wang, Peng; Song, Cheng; Liu, Lu
作者单位：City University of Hong Kong; Nanjing University of Science & Technology
摘要：In this article, coverage control for mobile sensors with double-integrator dynamics and different maximum velocities on a circle is investigated. A generalized energy function is introduced in the proposed coverage control laws to guarantee order preservation of the sensors despite of the existence of unknown but bounded disturbances. The velocity constraint of each sensor is shown to be always satisfied throughout the coverage task. It is shown that the sensor network can be driven to a neig...
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作者：Lan, Jianglin; Zhao, Dezong
作者单位：University of Glasgow
摘要：This article addresses the problem of finding the linear quadratic regulator (LQR) weights such that the associated discrete-time algebraic Riccati equations admit a common optimal stabilizing solution. Solving such a problem is key to designing LQR controllers to stabilize discrete-time switched linear systems under arbitrary switching, or stabilize polytopic systems (e.g., Takagi-Sugeno fuzzy systems and linear parameter varying systems) in the entire operating region. To ensure problem trac...
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作者：Song, Yue; Hill, David J.; Liu, Tao; Zhang, Xinran
作者单位：Tongji University; Tongji University; University of Hong Kong; Monash University; Beihang University
摘要：The impasse surface is an important concept in the differential-algebraic equation (DAE) model of power systems, which is associated with short-term voltage collapse. This article establishes a necessary condition for a system trajectory hitting the impasse surface. The condition is in terms of admittance matrices regarding the power network, generators, and loads, which specifies the pattern of interaction between those system components that can induce voltage collapse. It applies to generic...
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作者：Zhang, Dandan; Jin, Xin; Su, Hongye
作者单位：Zhejiang University; East China University of Science & Technology
摘要：In this article, we propose a new random reset rule for attitude control systems, where a new Lyapunov-Foster function implies the robust global attitude control without adding any constraints on the random reset rule, except the support domain for the involved random variables. Compared with deterministic binary logic variables, random variables introduce an automatically adjusted hysteresis half-width for each reset process, thus bring a flexible tradeoff between the hysteresis-induced ineff...
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作者：Degue, Kwassi Holali; Ny, Jerome Le
作者单位：Universite de Montreal; Polytechnique Montreal; Universite de Montreal
摘要：Large-scale monitoring and control systems increasingly rely on sensitive data obtained from private agents, e.g., location traces collected from the users of intelligent transportation systems. To encourage the participation of these agents, algorithms that process information in a privacy-preserving way are thus needed. This note revisits the Kalman filtering problem, subject to privacy constraints. We aim to enforce differential privacy, a formal state-of-the-art definition of privacy ensur...
