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作者：Liu, Guangyi; Somarakis, Christoforos; Motee, Nader
作者单位：Lehigh University; Merck & Company; Merck & Company USA
摘要：This article establishes and explores a framework to analyze the risk of cascading failures in a platoon of autonomous vehicles, accounting for communication time-delays and input uncertainty. Our proposed framework yields closed-form expressions for cascading collisions, which we quantify using the coherent average value-at-risk (AV@R) to assess the cascading effect of vehicle collisions within the platoon. We investigate how factors such as network connectivity, system dynamics, communicatio...
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作者：Zhao, Zhongyi; Wang, Zidong; Liang, Jinling; Xu, Wenying
作者单位：Southeast University - China; Brunel University
摘要：In this article, the zonotopic set-membership estimation (SME) problem is addressed for a class of nonlinear systems subjected to an encoding-decoding scheme, where the measurement information of each sensor is encoded and then transmitted to the remote fusion center. The objective of this article is to develop a zonotopebased weighted measurement fusion (WMF) method to fuse the received decoding signals, and to design a zonotopic SME algorithm that fully utilizes the higher-order partial deri...
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作者：Zou, Yao; Wang, Wei; Xia, Kewei; Zuo, Zongyu; Ding, Zhengtao
作者单位：University of Science & Technology Beijing; University of Science & Technology Beijing; University of Science & Technology Beijing; Beijing Institute of Technology; Beijing Institute of Technology; Beihang University; University of Manchester
摘要：This article focuses on the distributed strategy synthesis to tackle the collaborative optimization problem subject to general set constraints in fixed time. Distinct from the traditional collaborative optimization problem that requires local value functions and their sum being convex, no convexity requirement is essential herein. Besides, the underlying communication network is switching. By bringing in appropriate auxiliary mechanism, a fixed-time distributed optimization strategy is synthes...
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作者：Kon, Johan; Toth, Roland; van de Wijdeven, Jeroen; Heertjes, Marcel; Oomen, Tom
作者单位：Eindhoven University of Technology; Eindhoven University of Technology; HUN-REN; HUN-REN Institute for Computer Science & Control; ASML Holding; Delft University of Technology
摘要：It is often required that identified models exhibit certain stability and dissipativity properties, e.g., passivity or & ell;(2)-gain. The aim of this article is to develop an unconstrained parametrization of linear parameter-varying (LPV) input-output (IO) discrete-time (DT) models that guarantees stability/dissipativity by construction, i.e., the model is stable/dissipative for any choice of model parameters. To achieve this, it is shown that any quadratically stable/dissipative DT-LPV-IO mo...
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作者：Wang, Long; Wang, Qi; Spall, James C.; Zhu, Jingyi
作者单位：Johns Hopkins University; Johns Hopkins University; Johns Hopkins University Applied Physics Laboratory
摘要：Stochastic optimization aims to minimize loss functions with noisy function and/or gradient measurements only. Depending on the types of the underlying variables, optimization problems can often be categorized as continuous, discrete, or mixed (mixture of continuous and discrete variables). Motivated by the simultaneous perturbation stochastic approximation (SPSA) and the discrete simultaneous perturbation stochastic approximation (DSPSA) algorithms, we propose the mixed simultaneous perturbat...
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作者：Chen, Gongpu; Liew, Soung Chang
作者单位：Chinese University of Hong Kong; Imperial College London
摘要：This article investigates Markov decision processes (MDPs) with intermittent state information. We consider a scenario where the controller perceives the state of the process via an unreliable communication channel. The transmissions of state information over the whole time horizon are modeled as a Bernoulli lossy process. Hence, the problem is finding an optimal policy for selecting actions in the presence of state information losses. We first formulate the problem as a belief MDP to establis...
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作者：Liu, Zhijun; Mao, Xuerong
作者单位：Hubei Minzu University; University of Strathclyde
摘要：Influenced by the pioneering work of Astrom and Bernhardsson (2002), many results on the event-triggered control have been reported for different types of systems, such as ordinary differential equations and stochastic differential equations (SDEs). In the area of SDEs, the event-triggered mechanisms are essentially divided into two categories: First, a mechanism is designed based on a criterion in terms of the mathematical expectation of the system state, and second, it is designed based on a...
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作者：Garg, Kunal; Sanfelice, Ricardo G.; Cardenas, Alvaro A.
作者单位：Arizona State University; Arizona State University-Tempe; University of California System; University of California Santa Cruz; University of California System; University of California Santa Cruz
摘要：This article investigates security guarantees for cyber-physical systems (CPS) against actuator attacks. We introduce a new attack-detection mechanism based on zeroing control barrier function conditions. We propose an adaptive recovery mechanism that responds based on the system's proximity to safety violations. Our attack-detection mechanism has been proven to be sound, meaning that it consistently detects adversarial attacks without any false negatives. In addition, we propose a novel hybri...
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作者：Mazenc, Frederic; Malisoff, Michael
作者单位：Centre National de la Recherche Scientifique (CNRS); Universite Paris Saclay; Louisiana State University System; Louisiana State University
摘要：We study vector versions of Halanay's inequality. We provide an input-to-state stability result. Even in the scalar case, we provide tighter bounds than those that were available in the literature. Our key new techniques involve finding componentwise positive vectors in the null spaces of suitable matrices. These matrices are expressible as weighted sums involving the coefficient matrices that occur in the vector versions of Halanay's inequality. We allow time-varying coefficients in our Halan...
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作者：Stewart, Jacob; Ioannou, Petros A.
摘要：Effective disturbance rejection technology is important in a variety of industrial applications because disturbances can render products unsafe, unusable, or deteriorate their performance. Many varying disturbances that appear in practice may be modeled as a sum of sinusoidal components with constant or slowly time-varying amplitude and frequency parameters, and many of the systems have dynamics that are well modeled by linear time-invariant or linear time-varying systems. This article analyti...
