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arXiv 2020年

作者： Sarafraz, Mohammad Saeed Proskurnikov, Anton V. Tavazoei, Mohammad Saleh Esfahani, Peyman Mohajerin Electrical Engineering Department Sharif University of Technology Iran Department of Electronics and Telecommunications Politecnico di Torino Italy Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences St. Peters-burg Russia Delft Center for Systems and Control TU Delft Netherlands

We investigate the problem of practical output regulation, i.e., to design a controller that brings the system output in the vicinity of a desired target value while keeping the other variables bounded. We consider uncertain systems that are possibly nonlinear and the uncertainty of their linear parts is modeled element-wise through a parametric family of matrix boxes. An optimization-based design procedure is proposed that delivers a continuous-time control and estimates the maximal regulation error. We also analyze an event-triggered emulation of this controller, which can be implemented on a digital platform, along with an explicit estimates of the regulation error. Copyright © 2020, The Authors. All rights reserved.

关键词： Continuous time systems

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Addressing the Free-rider Problem in Voluntary Demand Response Programs

Addressing the Free-rider Problem in Voluntary Demand Respon...

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control Conference (ICC), 2019 Sixth Indian

作者： Ankur A. Kulkarni Anupama Kowli Systems and Control Engineering Indian Institute of Technology Bombay Department of Electrical Engineering Indian Institute of Technology Bombay

ISBN: (数字)9781728138602

ISBN: (纸本)9781728138619

Many electric utilities offer peak rebate programs, which allow them to call for load curtailment from participating consumers but the actual curtailment is voluntary. In this case, consumers may be tempted to “free-ride” on the compliance of other participants. Care should be taken in designing an appropriate incentive structure that is both, attractive enough to induce the desired curtailment, but not too attractive to induce excessive participation. This paper casts the consumer participation problem in DR as a game and analyzes its equilibrium to ascertain the nature of consumer response. We provide insights on the role of incentives and number of consumers called for curtailment, in inducing the desired curtailment.

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Perceptual Features as Markers of Parkinson's Disease: The Issue of Clinical Interpretability

arXiv

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arXiv 2022年

作者： Mekyska, Jiri Smekal, Zdenek Galaz, Zoltan Mzourek, Zdenek Rektorova, Irena Faundez-Zanuy, Marcos López-De-Ipiña, Karmele Department of Telecommunications Brno University of Technology Technicka 10 Brno61600 Czech Republic First Department of Neurology St. Anne's University Hospital Pekarska 53 Brno65691 Czech Republic Applied Neuroscience Research Group Central European Institute of Technology Masaryk University Komenskeho nam. 2 Brno60200 Czech Republic Escola Universitaria Politecnica de Mataro Tecnocampus Avda. Ernest Lluch 32 Barcelona Mataro08302 Spain Department of Systems Engineering and Automation University of the Basque Country UPV EHU Av de Tolosa 54 Donostia20018 Spain

Up to 90 % of patients with Parkinson's disease (PD) suffer from hypokinetic dysathria (HD) which is also manifested in the field of phonation. Clinical signs of HD like monoloudness, monopitch or hoarse voice are usually quantified by conventional clinical interpretable features (jitter, shimmer, harmonic-to-noise ratio, etc.). This paper provides large and robust insight into perceptual analysis of 5 Czech vowels of 84 PD patients and proves that despite the clinical inexplicability the perceptual features outperform the conventional ones, especially in terms of discrimination power (classification accuracy ACC = 92 %, sensitivity SEN = 93 %, specificity SPE = 92 %) and partial correlation with clinical scores like UPDRS (Unified Parkinson's disease rating scale), MMSE (Mini-mental state examination) or FOG (Freezing of gait questionnaire), where p © 2022, CC BY-NC-ND.

关键词： Neurodegenerative diseases

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Linear System Identification Under Multiplicative Noise from Multiple Trajectory Data

Linear System Identification Under Multiplicative Noise from...

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American control Conference

作者： Yu Xing Ben Gravell Xingkang He Karl Henrik Johansson Tyler Summers Key Lab of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences and School of Mathematical Sciences University of Chinese Academy of Sciences Beijing P. R. China Department of Mechanical Engineering The University of Texas at Dallas Richardson TX USA Division of Decision and Control Systems School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm Sweden

ISBN: (数字)9781538682661

ISBN: (纸本)9781538682678

The study of multiplicative noise models has a long history in control theory but is re-emerging in the context of complex networked systems and systems with learning-based control. We consider linear system identification with multiplicative noise from multiple state-input trajectory data. We propose exploratory input signals along with a least-squares algorithm to simultaneously estimate nominal system parameters and multiplicative noise covariance matrices. The asymptotic consistency of the least-squares estimator is demonstrated by analyzing first and second moment dynamics of the system. The results are illustrated by numerical simulations.

关键词： Trajectory Covariance matrices Linear systems Heuristic algorithms Optimal control Mathematical model

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A novel fault section location method based on binary global-best harmony search algorithm for electric power distribution systems

A novel fault section location method based on binary global...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Jin, Tao Lu, Siyuan Zhang, Yizhen Costa Flesch, Rodolfo Cesar Department of Electrical Engineering Fuzhou University Fuzhou350116 China Nanjing Special Equipment Safety Supervision Inspection Institute Nanjing210019 China Department of Automation and Systems Federal University of Santa Catarina Florianopolis88040900 Brazil

ISBN: (纸本)9781728135205

In response to the demand to improve efficiency and reliability of power system, the growing number of distributed generation (DG) has been implemented in distribution networks, making the networks more complicated. Combined with fault current information collected by feeder terminal unit (FTU) and fault switch function, this paper proposes a binary global-best harmony search algorithm (BGHS) to provide an accurate fault section location method for distribution networks with DG. The proposed algorithm adopts binary coding mode to fit the characteristics of the switch function, and employs the best harmony to perform pitch adjustment that enhances the accuracy and convergence rate. The correctness and feasibility of the algorithm is validated in a test distribution network with DG. The simulation results have shown remarkable accuracy in fault section location. Compared with harmony search (HS) algorithm and genetic algorithm (GA) in terms of number of premature convergences, convergence rate and computation time, the proposed algorithm shows a better performance. © 2019 IEEE.

关键词： Distributed power generation

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Dynamic Resilient Network Games with Applications to Multi-Agent Consensus

arXiv

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arXiv 2020年

作者： Nugraha, Yurid Cetinkaya, Ahmet Hayakawa, Tomohisa Ishii, Hideaki Zhu, Quanyan Department of Systems and Control Engineering Tokyo Institute of Technology Tokyo152-8552 Japan Information Systems Architecture Science Research Division National Institute of Informatics Tokyo101-8430 Japan Department of Computer Science Tokyo Insitute of Technology Yokohama226-8502 Japan Department of Electrical and Computer Engineering New York University BrooklynNY11201 United States

A cyber security problem in a networked system formulated as a resilient graph problem based on a game-theoretic approach is considered. The connectivity of the underlying graph of the network system is reduced by an attacker who removes some of the edges whereas the defender attempts to recover them. Both players are subject to energy constraints so that their actions are restricted and cannot be performed continuously. For this two-stage game, which is played repeatedly over time, we characterize the optimal strategies for the attacker and the defender in terms of edge connectivity and the number of connected components of the graph. The resilient graph game is then applied to a multi-agent consensus problem. We study how the attacks and the recovery on the edges affect the consensus process. Finally, we also provide numerical simulation to illustrate the results. Copyright © 2020, The Authors. All rights reserved.

关键词： Multi agent systems

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Reliability, fault tolerance and other critical components for survivability in information warfare 1

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14th International Joint Conference on e-Business and Telecommunications, ICETE 2017

作者： Stavroulakis, Peter Kolisnyk, Maryna Kharchenko, Vyacheslav Doukas, Nikolaos Markovskyi, Oleksandr P. Bardis, Nikolaos G. Chania Greece Department of Computer Systems and Networks National Aerospace University "KhAI" Kharkiv Ukraine Hellenic Army Academy Varis – Koropiou Avenue Vari 116 72 Greece Department of Computer Engineering National Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute Kiev Ukraine Department of Automation and Control in Technical Systems National Technical University "KPI" Kharkiv Ukraine

ISBN: (数字)9783030110390

ISBN: (纸本)9783030110383

The information revolution has caused many aspects of human activity to critically depend on a wide variety of physically existing or virtual technological achievements such as electronic devices, computer systems, algorithms, cloud resources, artificial intelligence hardware and software entities etc. Many of these systems are used in highly sensitive contexts, such as military applications. This implies the existence of an increasing number of unintentional disturbances or malicious attacks. Successful operation requires qualities such as robustness, fault tolerance, reliability, availability and security. All these may be summarized by the title of survivability. Survivability of critical systems working for sensitive applications involves the ability to provide uninterrupted operation under severe disturbances, gracefully degrade when limiting conditions are reached and maintain the ability to resume normal service once the disturbances have been removed. Survivability is an important, even - though non – functional, lifecycle property of many engineering systems. Further desirable elements of survivability include the ability of systems to recognize and resist attacks or accidents, adapt in order to avoid them and modify their behavior in order to diminish the effects of similar future occurrences. This chapter presents a quantitative approach to assessing survivability and an account of survivability in military systems. A scheme for survivability via replica diversity in the implementation of the AES algorithm is then presented. Following that, an algorithm for adaptive attack aversion in user authentication systems is presented that is based on Boolean transformations. An approach for increased survivability in Internet of Things (IoT) systems is then presented. Finally, an algorithm for secure data storage in cloud resources is presented that allows attack detection and avoidance. © Springer Nature Switzerland AG 2019.

关键词： Fault tolerance

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controlling a Networked SIS Model via a Single Input over Undirected Graphs ⁎

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IFAC-PapersOnLine 2020年第2期53卷 10981-10986页

作者： Dan Wang Ji Liu Philip E. Paré Wei Chen Li Qiu Carolyn L. Beck Tamer Başar Department of Electronic & Computer Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China Department of Electrical and Computer Engineering Stony Brook University NY 11794 USA Division of Decision and Control Systems KTH Royal Institute of Technology Stockholm Sweden Department of Mechanics and Engineering Science & Beijing Innovation Center for Engineering Science and Advanced Technology Peking University Beijing China Coordinated Science Laboratory University of Illinois at Urbana-Champaign IL 61801 USA

This paper formulates and studies the problem of controlling a networked SIS model using a single input in which the network structure is described by a connected undirected graph. A necessary and sufficient condition on the values of curing and infection rates for the healthy state to be exponentially stable is obtained via the analysis of signed Laplacians when the control input is the curing budget of a single agent. In the case when the healthy state is stabilizable, an explicit expression for the minimum curing budget is provided. The utility of the algorithm is demonstrated using a simulation over a network of cities in the northeastern United States.

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An Energy-Efficient Context Aware Solution for Environmental Assessment ⁎

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IFAC-PapersOnLine 2020年第5期53卷 756-761页

作者： Isabela Birs Cristina Muresan Ioan Nascu Clara Ionescu Ghent University Faculty of Engineering and Architecture Research Group of Dynamical Systems and Control Tech Lane Science Park 125 B-9052 Ghent Belgium EEDT Decision & Control Flanders Make Consortium Tech Lane Science Park 131 B-9052 Ghent Belgium Department of Automation Technical University of Cluj-Napoca Memorandumului 28 Cluj-Napoca Romania

The paper focuses on presenting the advantages of context aware cyber-physical systems through an experimental platform capable of assessing its surroundings and self-performing decisions. The context aware paradigm is present in the control law implementation with various advantages such as energy efficiency as well as in the environmental measurements that trigger the robot to perform context-relevant decisions. The platform provides high versatility and the results presented throughout the study can be adapted to a manifold of multidisciplinary fields.

关键词： Submerged Vehicle Context Awareness Environmental Assessment Event-based control

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Spin-phonon interaction in yttrium iron garnet

arXiv

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arXiv 2021年

作者： Olsson, Kevin S. Choe, Jeongheon Rodriguez-Vega, Martin Khalsa, Guru Benedek, Nicole A. Fang, Bin Zhou, Jianshi Fiete, Gregory A. Li, Xiaoqin Department of Physics Center of Complex Quantum Systems The University of Texas at Austin AustinTX78712 United States Center for Dynamics and Control of Materials The University of Texas at Austin AustinTX78712 United States Department of Physics Northeastern University BostonMA02115 United States Department of Materials Science and Engineering Cornell University IthacaNY14853 United States Department of Mechanical Engineering The University of Texas at Austin AustinTX78712 United States Texas Materials Institute The University of Texas at Austin AustinTX78712 United States Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Department of Computer and Electrical Engineering University of Maryland College ParkMD20740 United States

Spin-phonon interaction is an important channel for spin and energy relaxation in magnetic insulators. Understanding this interaction is critical for developing magnetic insulator-based spintronic devices. Quantifying this interaction in yttrium iron garnet (YIG), one of the most extensively investigated magnetic insulators, remains challenging because of the large number of atoms in a unit cell. Here, we report temperature-dependent and polarization-resolved Raman measurements in a YIG bulk crystal. We first classify the phonon modes based on their symmetry. We then develop a modified mean-field theory and define a symmetry-adapted parameter to quantify spin-phonon interaction in a phononmode specific way for the first time in YIG. Based on this improved mean-field theory, we discover a positive correlation between the spin-phonon interaction strength and the phonon frequency. Copyright © 2021, The Authors. All rights reserved.

关键词： Phonons

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