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作者：Ma, Youdao; Wang, Zhenhua; Kinnaert, Michel; Shen, Yi
作者单位：Harbin Institute of Technology
摘要：This article studies the problem of interval estimation for systems with nonlinear equality constraints and unknown but bounded uncertainties. An iterative zonotope-based method is presented to compute accurate interval bounds of system states. To manage the nonlinear constraints, we utilize a Taylor expansion and consider the dependence in the remainder. Furthermore, to determine the optimal zonotopic enclosures of the intersection of two zonotopes, the widths of the smallest intervals enclos...
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作者：Marelli, Damian; Sui, Tianju; Fu, Minyue; Cai, Qianqian
作者单位：Guangdong University of Technology; Dalian University of Technology; Southern University of Science & Technology
摘要：A typical cyber-physical system setup includes a local system sending measurements of its internal state to a remote state estimator. A form of attack consists of an eavesdropper observing this information exchange. Secrecy coding schemes have been recently proposed to achieve immunity to eavesdropping. The essential idea consists in coding the transmitting information in a way such that a single packet lost by the eavesdropper causes an irrecoverable error of its state estimation. Common limi...
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作者：Yang, Nachuan; Li, Yuzhe; Chen, Tongwen; Shi, Ling
作者单位：Hong Kong University of Science & Technology; Northeastern University - China; University of Alberta
摘要：In this article, we consider the design of structured Luenberger observers to generate sparse sensor-estimator communication networks. We first illustrate the relationship between the topology of communication channels and the structure of the observer gain matrix. To balance the estimation error and the communication cost, we formulate the design of the sparsity-promoting observer as a regularized l(1)-optimization problem. Then, we characterize its first-order optimality condition using grad...
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作者：Cho, Myung
作者单位：California State University System; California State University Northridge
摘要：In this article, we consider a linear-quadratic regulator (LQR) design problem for distributed control systems. For large-scale distributed systems, finding a solution might be computationally demanding due to communications among agents. To this aim, we deal with LQR minimization problem with a regularization for sparse feedback matrix, which can lead to achieve the reduction of the communication links in the distributed control systems. For this work, we introduce simple but efficient iterat...
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作者：Chapman, Margaret P.; Kalogerias, Dionysis
作者单位：University of Toronto; Yale University
摘要：In this article we develop a generalized stability framework for stochastic discrete-time linear systems that enriches the ways in which the distribution of the state energy can be characterized. We use tools from finance and operations research called risk functionals (i.e., risk measures) to facilitate diverse distributional characterizations. In contrast, classical stochastic stability notions characterize the state energy on average or in probability, which can obscure the variability of s...
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作者：Khong, Sei Zhen; Lanzon, Alexander
作者单位：National Sun Yat Sen University; University of Manchester
摘要：We establish robust stability of feedback interconnections of linear time-invariant systems with potentially marginally stable open-loop poles via frequency-varying quadratic constraints. These constraints may be used to characterise numerous system properties, such as small-gain, passivity, negative imaginariness, and their weighted variants, that are manifested on different band-limited frequencies. Such systems arise in practical mechanical settings where force actuators and displacement/ve...
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作者：Oh, Sang-Young; Choi, Ho-Lim
作者单位：Dong A University
摘要：In this note, we propose an adaptive zero-order-hold triggered control (ZTC) for a chain of integrators with unknown input delay and interexecution time by output feedback. The proposed controller is memoryless as it does not engage any triggering conditions. Our controller is adaptive, this allows it to deal with unknown input delay and interexecution time. The system analysis of the method considered in this note shows that the closed-loop system is globally regulated while its convergence s...
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作者：Wu, Liang; Braatz, Richard D.
作者单位：Massachusetts Institute of Technology (MIT)
摘要：Providing an execution time certificate is a pressing requirement when deploying model predictive control (MPC) in real-time embedded systems such as microcontrollers. Real-time MPC requires that its worst-case (maximum) execution time must be theoretically guaranteed to be smaller than the sampling time in a closed-loop. This technical note considers input-constrained MPC problems and exploits the structure of the resulting box-constrained QPs. Then, we propose a cost-free and data-independen...
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作者：Jiang, Yi; Chai, Tianyou; Chen, Guanrong
作者单位：City University of Hong Kong; City University of Hong Kong; Northeastern University - China; Northeastern University - China
摘要：This article investigates the optimal output regulation problem for continuous-time strict-feedback nonlinear systems, in which the full states are not measurable in real-time, and a priori knowledge of system dynamics and an admissible control policy are both unavailable. Fundamental challenges here differing from existing works are twofold: 1) only output data rather than full state data are available; 2) policy iteration cannot be performed since admissible control policy is not available. ...
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作者：Sakurama, Kazunori; Asai, Ryo; Yamazumi, Mitsuhiro
作者单位：University of Osaka; Honda Motor Company; Mitsubishi International Corporation (MIC); Mitsubishi Electric Corporation
摘要：In this article, we address a coordination-control problem of multiagent systems with various types of relative measurements in a unified way. To this end, we express relative measurements in the agents' own frames using the frame transformation introduced in this article. This transformation is expressed with a subset of semidirect products, and it describes different types of practical measurement information, such as uncertain measurements in positions and bearings. Second, a distributed co...
