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作者：Soleymani, Touraj; Baras, John S.; Johansson, Karl H.
作者单位：Imperial College London; Royal Institute of Technology; University System of Maryland; University of Maryland College Park
摘要：State estimation over a communication channel, in which sensory information of a stochastic source is transmitted in real-time by an encoder to a decoder that estimates the state of the source, is one of the basic problems in networked control systems. In this article, we investigate the performance of state estimation under two primary network imperfections: packet loss and time delay. To that end, we make a causal frequency-distortion tradeoff that is defined between the packet rate and the ...
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作者：Huff, Daniel Denardi; Fiacchini, Mirko; Gomes da Silva Jr, Joao Manoel
作者单位：Communaute Universite Grenoble Alpes; Institut National Polytechnique de Grenoble; Universite Grenoble Alpes (UGA); Centre National de la Recherche Scientifique (CNRS); Universidade Federal do Rio Grande do Sul
摘要：This work deals with the mean square exponential stabilization of sampled-data linear systems subject to sector-bounded actuator nonlinearities and to aperiodic sampling intervals, which are assumed to be Erlang-distributed random variables. The possibility of packet dropouts is also taken into account and modeled by a Bernoulli process. Linear matrix inequality (LMI) conditions are proposed to design a stabilizing state-feedback controller for the system. Moreover, it is shown that the method...
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作者：Cui, Leilei; Pang, Bo; Jiang, Zhong-Ping
作者单位：New York University; New York University Tandon School of Engineering
摘要：This article studies the adaptive optimal control problem for a class of linear time-delay systems described by delay differential equations. A crucial strategy is to take advantage of recent developments in reinforcement learning and adaptive dynamic programming and develop novel methods to learn adaptive optimal controllers from finite samples of input and state data. In this article, the data-driven policy iteration (PI) is proposed to solve the infinite-dimensional algebraic Riccati equati...
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作者：Duan, Xiaoming; Xu, Zhe; Yan, Rui; Topcu, Ufuk
作者单位：Shanghai Jiao Tong University; Arizona State University; Arizona State University-Tempe; University of Oxford; University of Texas System; University of Texas Austin
摘要：In this article, we study privacy-utility tradeoffs where users share privacy-correlated useful information with a service provider to obtain some utility. The service provider is adversarial in the sense that it can infer the users' private information based on the shared useful information. To minimize the privacy leakage while maintaining a desired level of utility, the users carefully perturb the useful information via a probabilistic privacy mapping before sharing it. We focus on the sett...
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作者：Cui, Yukang; Wu, Zongze; Gong, Xin; Basin, Michael V.; Huang, Tingwen
作者单位：Shenzhen University; Southeast University - China; Ningbo University of Technology; Universidad Autonoma de Nuevo Leon; Shenzhen University of Advanced Technology
摘要：This note studies the stability problem of nonlinear positive differential-difference equations with unbounded time-varying delays. Under assumptions on the nonlinear vector fields, such as being homogeneous, cooperative, and order-preserving, conditions are derived for positivity and asymptotic stability of nonlinear differential-difference equations, which include the corresponding linear system as a special case. This work features three main contributions: first, a necessary and sufficient...
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作者：Saoud, Adnane; Maghenem, Mohamed; Loria, Antonio; Sanfelice, Ricardo G.
作者单位：Mohammed VI Polytechnic University; Communaute Universite Grenoble Alpes; Institut National Polytechnique de Grenoble; Universite Grenoble Alpes (UGA); Centre National de la Recherche Scientifique (CNRS); Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Centre National de la Recherche Scientifique (CNRS); Universite Paris Saclay; University of California System; University of California Santa Cruz
摘要：In this article, we propose a framework of stability analysis for a class of linear nonautonomous hybrid systems, with solutions evolving in continuous time governed by an ordinary differential equation and undergoing instantaneous changes governed by a difference equation. Furthermore, the jumps may also be triggered by exogeneous hybrid signals. The proposed framework builds upon a generalization of notions of persistency of excitation (PE) and uniform observability (UO), which we redefine t...
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作者：Schlotterbeck, Constanza; Gallegos, Javier A.; Teel, Andrew R.; Nunez, Felipe
作者单位：Pontificia Universidad Catolica de Chile; University of California System; University of California Santa Barbara
摘要：Stability guarantees in networked control systems (NCSs) have traditionally been addressed in the deterministic setting using the concepts of maximum allowable transmit interval and maximum allowable delay (MAD). Motivated by the widespread use of nondeterministic networks in modern industrial NCSs, this note aims to extend the analysis to the stochastic setting by considering a setup where the NCS faces stochastic communication delays, which take values over the MAD with positive probability....
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作者：Adil, Ania; N'Doye, Ibrahima; Laleg-Kirati, Taous-Meriem
作者单位：Universite Mouloud Mammeri de Tizi Ouzou; King Abdullah University of Science & Technology; King Abdullah University of Science & Technology; King Abdullah University of Science & Technology
摘要：In this article, we propose a prescribed-time observer for nonlinear triangular systems with delayed outputs. The proposed observer is endowed with prescribed-time stability and relies on a scaling function and Lyapunov-Razumikhin-based conditions. We establish that the observer design derives a delay-independent stability condition in terms of linear matrix inequalities that guarantees prescribed-time convergence to zero of the estimation error. Additionally, we derive an explicit relation be...
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作者：Costa, Oswaldo L. V.; de Oliveira, Andre M.
作者单位：Universidade de Sao Paulo; Universidade Federal de Sao Paulo (UNIFESP)
摘要：This article studies the L-2-L-infinity (also known as energy-to-peak) static output feedback control for continuous-time semi-Markov jump systems, with the jump times modeled through phase-type distributions. It is also assumed that the post-jump state variable of the semi-Markov model is not directly accessible and the controller has only access to an observed process related to this variable. The goal is to provide sufficient conditions for the design of static output feedback controllers s...
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作者：Rehan, Ahmed; Boiko, Igor; Zweiri, Yahya
作者单位：Khalifa University of Science & Technology; Khalifa University of Science & Technology; Khalifa University of Science & Technology
摘要：Chattering in sliding mode (SM) control is known as fast self-excited periodic motions (oscillations) that occur due to the combination of two factors: nonlinearities that are not Lipschitz continuous and additional dynamics of actuators and sensors (the dynamics not accounted for in SM control system design). It is found in the present research that under certain combinations of parameters of the discontinuous homogeneous SM controller and actuator, the chattering is manifested not as periodi...
