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作者：Wang, Jimin; Zhang, Ji-Feng
作者单位：University of Science & Technology Beijing; University of Science & Technology Beijing; Chinese Academy of Sciences; Academy of Mathematics & System Sciences, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
摘要：Differentially private distributed stochastic optimization has become a hot topic due to the need for privacy protection in distributed stochastic optimization. In this article, two-time scale stochastic approximation-type algorithms for differentially private distributed stochastic optimization with time-varying sample sizes are proposed using gradient- and output-perturbation methods. For both gradient- and output-perturbation cases, the convergence of the algorithm and differential privacy ...
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作者：Wu, Ze-Hao; Deng, Feiqi; Zhou, Hua-Cheng; Zhao, Zhi-Liang
作者单位：Foshan University; South China University of Technology; Central South University; North University of China
摘要：In this article, linear and nonlinear event-triggered extended state observers are designed for a class of uncertain random systems driven by bounded noise and colored noise. Two event generators, with an ensured positive minimum interevent time for every sample path solution of the random systems, are proposed for the designs of linear and nonlinear event-triggered extended state observers, respectively. The mean square and almost sure convergence of the estimation errors of unmeasured state ...
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作者：Andritsch, Benedikt; Watermann, Lars; Koch, Stefan; Reichhartinger, Markus; Reger, Johann; Horn, Martin
作者单位：Graz University of Technology; Technische Universitat Ilmenau; Graz University of Technology
摘要：In this article, a novel discrete-time realization of the super-twisting controller is proposed. The closed-loop system is proven to converge to an invariant set around the origin in finite time. Furthermore, the steady-state error is shown to be independent of the controller gains. It only depends on the sampling time and the unknown disturbance. The proposed discrete-time controller is evaluated comparative to previously published discrete-time super-twisting controllers by means of the cont...
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作者：Animobono, Davide; Zattoni, Elena; Scaradozzi, David; Perdon, Anna Maria; Conte, Giuseppe
作者单位：Marche Polytechnic University; University of Bologna
摘要：Switching linear systems over the max-plus algebra can be used to model production plants where different choices in resource allocation are possible. In such a case, internal and external variables represent the time instants at which internal or external events occur. In particular, output variables represent the time instants at which lots of manufactured goods are released to the market. Here, we consider the problems of system synchronization and subsynchronization, which consist of forci...
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作者：Czornik, Adam; Makarov, Evgenii K.; Niezabitowski, Michal; Popova, Svetlana; Zaitsev, Vasilii
作者单位：Silesian University of Technology; National Academy of Sciences of Belarus (NASB); Institute of Mathematics of the National Academy of Sciences of Belarus; Udmurt State University
摘要：In this article, we consider a linear discrete time-invariant control system with linear time-varying state feedback. Our main goal is to determine what types of asymptotic dynamics are possible for this system. We introduce and investigate certain discrete-time analogs for notions of global attainability, global Lyapunov reducibility, and global assignability of Lyapunov invariants currently known in the continuous-time case. We prove that uniform complete controllability of the open-loop sys...
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作者：Wang, Yongqiang; Nedic, Angelia
作者单位：Clemson University; Arizona State University; Arizona State University-Tempe
摘要：Decentralized optimization enables a network of agents to cooperatively optimize an overall objective function without a central coordinator and is gaining increased attention in domains as diverse as control, sensor networks, data mining, and robotics. However, the information sharing among agents in decentralized optimization also discloses agents' information, which is undesirable or even unacceptable when involved data are sensitive. This article proposes two gradient-based decentralized o...
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作者：Xie, Yifan; Li, Shaoyuan; Yin, Xiang
作者单位：University of Stuttgart; Shanghai Jiao Tong University; Shanghai Jiao Tong University
摘要：In this article, we investigate both qualitative and quantitative synthesis of optimal privacy-enforcing supervisors for partially observed discrete-event systems. We consider a dynamic system whose information flow is partially available to an intruder, which is modeled as a passive observer. We assume that the system has a secret that does not want to be revealed to the intruder. Our goal is to synthesize a supervisor that controls the system in a least-restrictive manner such that the close...
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作者：Lu, Xiaodong; Wang, Ting; Zhao, Yanlong
作者单位：Chinese Academy of Sciences; Academy of Mathematics & System Sciences, CAS; University of Science & Technology Beijing; University of Science & Technology Beijing; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
摘要：This article adopts the event-triggered control strategy to investigate the consensus problem of multiagent systems. Owing to the effect of random noises, the communication information among agents is transmitted based on binary-valued measurements. Each agent employs the recursive projection algorithm to estimate the states of all neighbors. Then, an event-triggered protocol with time-varying threshold parameters is proposed to guarantee that the state of each agent can lie within the same bo...
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作者：Ma, Ziyue; Jiang, Jiagang; Cai, Kai
作者单位：Xidian University; Osaka Metropolitan University
摘要：In this article, we study a secret protection problem in discrete-event systems. The system is modeled by an automaton in which several states are assigned with different secret levels. Our aim is to protect some of the events in the system such that any sequence yielding a secret state contains a number of protected events no less than the required security level. We first study the secret-protecting problem with minimum cost, i.e., to design a protecting policy whose cost is minimal. We prov...
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作者：Paunonen, Lassi; Afshar, Sepideh
作者单位：Tampere University
摘要：We introduce general results on well-posedness and output regulation of regular linear systems with nonautonomous controllers. We present a generalization of the internal model principle for time-dependent controllers with asymptotically converging parameters. This general result is utilized in controller design for output tracking and disturbance rejection of harmonic signals with unknown frequencies. Our controller can be flexibly combined with different frequency estimation methods. The res...
