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2nd International Conference on Power, Energy, Control, Signals and systems, IPECS 2022

作者： Varghese, P. Rini Subathra, M.S.P. Mathew, Cijo George, S. Thomas Sairamya, N.J. Department of Electrical and Electronics Engineering School of Engineering and Technology Karunya Institute of Technology and Sciences Tamil Nadu Coimbatore641114 India Department of Robotics Engineering School of Engineering and Technology Karunya Institute of Technology and Sciences Tamil Nadu Coimbatore641114 India Department of Mechanical Engineering Mar Athanasius College of Engineering Kerala Kothamangalam686666 India Department of Biomedical Engineering School of Engineering and Technology Karunya Institute of Technology and Sciences Tamil Nadu Coimbatore641114 India Department of Electrical and Computer Engineering Université du Québec a Trois-Rivières 3351 Bd Des Forges Trois-RivièresQCG8Z 4M3 Canada

ISBN: (纸本)9789819909148

HIF in a power system can be due to a broken or unbroken distribution line in a power system. The fault possesses dynamic features, including nonlinearity, randomness, asymmetry, shoulder, buildup, and intermittence. Thus, to address various power system issues, it became essential to model the arcing nature of the fault. This review paper summarizes the various HIF arc modeling from the year 1993−2021. It gives a broad insight into the evolution of various models like the Emanual arc model, Mayr’s model, Kizilcay model, Matthews’s arc model, two variable resistance model, fixed-resistance model, etc. To design and develop new protection schemes, a more accurate modeling of HIF is required for estimating the transient response of the power systems. Accurate fault transient prediction necessitates a complete and comprehensive characterization of all power system components. For the development of reliable HIF and Non-HIF detecting methods, accurate modeling is required. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Transient analysis

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An Efficient Medium Access Control Mechanism for Flying Ad-hoc Networks

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computer systems Science & engineering 2021年第7期38卷 47-63页

作者： Muhammad Asghar Khan Fazal Noor Insaf Ullah Sajjad ur Rehman Shibli Nisar Mohaira Ahmad Department of Electronic Engineering ISRA UniversityIslamabad44000Pakistan Department of Computer Science and Information Systems Islamic University of MadinahMadinah400411Saudi Arabia Hamdard Institute of Engineering&Technology Islamabad44000Pakistan Department of Electrical Engineering Namal InstituteMianwali42200Pakistan Department of Electrical Engineering National University of Sciences and Technology(NUST)Islamabad44000Pakistan

The Flying Ad-hoc Networks(FANETs)is characterized by the transition from a single large Unmanned Aerial Vehicle(UAV)to multiple small UAVs connected in an ad-hoc *** high mobility is the core feature of such networks,they are prone to route breaks within the *** issue of connectivity loss can be coped with,to some extent,by making use of omnidirectional *** modification,however,curtails Quality-of-Service(QoS)requirements of networks in terms of bandwidth,media access delay,coverage and ***,directional antennas have advantages over omnidirectional antennas such as improved transmission range,spatial reuse and high ***,its introduction raises location-dependent issues to the Medium Access Control(MAC)*** calls for an efficient MAC protocol that can cater to new directional antenna models and,at the same time,can counter the constraints associated with the dynamic ***,in this article,we consider a UAV interconnection mechanism that lets the UAVs execute the communication tasks using the directional MAC *** technique is advantageous as compared to the approach of utilizing the MAC protocol using omnidirectional *** scheme is being implemented as a case study for Industry 4.0 inventory and traceability applications in the *** modeling and simulation purposes,we use the Optimized Network engineering Tool(OPNET)and aim to seek an evaluation with respect to throughput,media access delay,retransmission attempts and data *** results obtained demonstrate the effectiveness of the proposed scheme.

关键词： FANETs QoS Industry 4.0 IEEE 802.11 MAC OPNET mobility models directional antenna

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Learning Closed-Loop Parametric Nash Equilibria of Multi-Agent Collaborative Field Coverage

arXiv

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arXiv 2025年

作者： Chen, Jushan Paternain, Santiago Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute 110 8th St TroyNY12180 United States

Multi-agent reinforcement learning is a challenging and active field of research due to the inherent nonstationary property and coupling between agents. A popular approach to modeling the multi-agent interactions underlying the multi-agent RL problem is the Markov Game. There is a special type of Markov Game, termed Markov Potential Game, which allows us to reduce the Markov Game to a single-objective optimal control problem where the objective function is a potential function. In this work, we prove that a multi-agent collaborative field coverage problem, which is found in many engineering applications, can be formulated as a Markov Potential Game, and we can learn a parameterized closed-loop Nash Equilibrium by solving an equivalent single-objective optimal control problem. As a result, our algorithm is 10x faster during training compared to a game-theoretic baseline and converges faster during policy execution. © 2025, CC BY.

关键词： Markov processes

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Convex Equilibrium-Free Stability and Performance Analysis of Discrete-Time Nonlinear systems

arXiv

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arXiv 2024年

作者： Koelewijn, Patrick J.W. Weiland, Siep Tóth, Roland Control Systems Group Department of Electrical Engineering Eindhoven University of Technology Netherlands Systems and Control Laboratory HUN-REN Institute for Computer Science and Control Hungary

This paper considers the equilibrium-free stability and performance analysis of discrete-time nonlinear systems. We consider two types of equilibrium-free notions. Namely, the universal shifted concept, which considers stability and performance w.r.t. all equilibrium points of the system, and the incremental concept, which considers stability and performance between trajectories of the system. In this paper, we show how universal shifted stability and performance of discrete-time systems can be analyzed by making use of the time-difference dynamics. Moreover, we extend the existing results for incremental dissipativity for discrete-time systems based on dissipativity analysis of the differential dynamics to more general state-dependent storage functions for less conservative results. Finally, we show how both these equilibrium-free notions can be cast as a convex analysis problem by making use of the linear parameter-varying framework, which is also demonstrated by means of an example. Copyright © 2024, The Authors. All rights reserved.

关键词： Nonlinear systems

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Autonomous Search of Semantic Objects in Unknown Environments

arXiv

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arXiv 2023年

作者： Qian, Zhentian Fu, Jie Xiao, Jing Robotics Engineering Department Worcester Polytechnic Institute WorcesterMA United States Department of Electrical and Computer Engineering University of Florida GainesvilleFL United States

This paper addresses the problem of enabling a robot to search for a semantic object, i.e., an object with a semantic label, in an unknown and GPS-denied environment. For the robot in the unknown environment to detect and find the target semantic object, it must perform simultaneous localization and mapping (SLAM) at both geometric and semantic levels using its onboard sensors while planning and executing its motion based on the ever-updated SLAM results. In other words, the robot must be able to conduct simultaneous localization, semantic mapping, motion planning, and execution in real-time in the presence of sensing and motion uncertainty. This is an open problem as it combines semantic SLAM based on perception and real-time motion planning and execution under uncertainty. Moreover, the goals of the robot motion change on the fly depending on whether and how the robot can detect the target object. We propose a novel approach to tackle the problem, leveraging semantic SLAM, Bayesian Networks, Markov Decision Process, and Real-Time Dynamic Programming. The results in simulation and real experiments demonstrate the effectiveness and efficiency of our approach. © 2023, CC BY.

关键词： Semantics

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Indented Core to Reduce and Desensitize Inductor’s Fringing Losses without Increasing Volume

Indented Core to Reduce and Desensitize Inductor’s Fringing...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： Rajaie Nassar Promit Datta Guo-Quan Lu Christina DiMarino Khai Ngo The Bradley Department of Electrical and Computer Engineering Center for Power Electronics Systems (CPES) Virginia Polytechnic Institute and State University Blacksburg VA USA

ISBN: (数字)9798331516116

ISBN: (纸本)9798331516123

There is a constant push towards more compact and efficient power electronic converters. However, the fringing losses of gapped magnetic components inhibit size reduction by requiring extra space to keep the winding away from the gaps. Concurrent high efficiency and high power density cannot thus be achieved with conventional gapping approaches. A core structure that reduces the fringing and overall losses without requiring additional space is presented here, simultaneously enabling higher efficiency and power density. The geometry also reduces the sensitivity of the winding to its position in the winding window compared to the conventional discrete gapping approach. The idea is verified in a planar inductor design, decreasing the power loss of a soft-switched unloaded buck converter by more than 32%.

关键词： Resistance Geometry Power system measurements Sensitivity Density measurement Magnetic cores Windings Power electronics Magnetic losses Inductors

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Towards Accurate Loop Closure Detection in Semantic SLAM with 3D Semantic Covisibility Graphs

arXiv

引用

arXiv 2023年

作者： Qian, Zhentian Fu, Jie Xiao, Jing The Robotics Engineering Department Worcester Polytechnic Institute WorcesterMA United States The Department of Electrical and Computer Engineering University of Florida GainesvilleFL United States

Loop closure is necessary for correcting errors accumulated in simultaneous localization and mapping (SLAM) in unknown environments. However, conventional loop closure methods based on low-level geometric or image features may cause high ambiguity by not distinguishing similar scenarios. Thus, incorrect loop closures can occur. Though semantic 2D image information is considered in some literature to detect loop closures, there is little work that compares 3D scenes as an integral part of a semantic SLAM system. This paper introduces an approach, called SmSLAM+LCD, integrated into a semantic SLAM system to combine high-level 3D semantic information and low-level feature information to conduct accurate loop closure detection and effective drift reduction. The effectiveness of our approach is demonstrated in testing results. © 2023, CC BY.

关键词： Semantics

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AI-Driven Fault Detection in Smart Grids 3

AI-Driven Fault Detection in Smart Grids

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3rd Odisha International Conference on electrical Power engineering, Communication and Computing Technology, ODICON 2024

作者： Pradeep, S. Rex, C. R. Edwin Selva Kalaiyarasi, D. Dhandapani, Ramya Sakthivel, M. Vijaipriya, K. S. A. Engineering College Department of Electronics and Communication Engineering Tamil Nadu 600077 India Vignana Bharathi Institute of Technology Department of Electrical and Electronic Engineering Telangana Hyderabad501301 India Panimalar Engineering College Department of Electronics and Communication Engineering Tamil Nadu Chennai600123 India Sri Eshwar College of Engineering Department of Computer Science and Business Systems Tamil Nadu Coimbatore India Velammal College of Engineering and Technology Department of Electronics and Communication Engineering Tamil Nadu Madurai India Sri Sai Ranganathan Engineering College Department of Electronics and Communication Engineering Tamil Nadu Coimbatore India

ISBN: (纸本)9798350354379

The use of artificial intelligence (AI) for fault finding in smart grids, with the end goal of improving the reliability and efficiency of ultramodern power systems. Smart grids, which are distinguished by their intricate architectural design and massive data collection, are equipped with cutting-edge approaches for the quick and precise identification of breakdowns. Through the utilization of artificial intelligence techniques, such as Deep Reinforcement Learning (DRL) method can analyze big datasets, identify anomalies, and accurately predict implicit errors with a high degree of precision. In this research, artificial intelligence algorithms that are colorful are investigated, along with their effectiveness in real-time monitoring and defect finding within smart grids. The advantages of AI-driven defect discovery over traditional methods are demonstrated through case studies and simulations. These advantages include important breakthroughs in response time, delicacy, and functional adaptability. The incorporation of artificial intelligence into the management of smart grids holds the potential to bring about substantial breakthroughs in the areas of grid stability maintenance, time-out reduction, and energy distribution optimization. The purpose of this research is to provide a complete analysis of the role that artificial intelligence plays in defect finding. It also offers insight into future advances and practical applications in smart grid systems. © 2024 IEEE.

关键词： Deep reinforcement learning

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Analog, Programmable Switched Capacitor FIR Filter Based on Rotator Architecture Implemented in CMOS Technology

Analog, Programmable Switched Capacitor FIR Filter Based on ...

引用

Signal Processing Algorithms, Architectures, Arrangements and Applications (SPA)

作者： Paweł Pawłowski Rafał Długosz Marek Radkowski Mateusz Wątły Adam Dąbrowski Faculty of Control Robotics and Electrical Engineering Institute of Automatic Control and Robotics Division of Signal Processing and Electronic Systems Poznań University of Technology Poznań Poland Faculty of Telecommunication Computer Science and Electrical Engineering Bydgoszcz University of Science and Technology Bydgoszcz Poland

The paper presents project and its verification of a prototype integrated circuit containing an analog, programmable finite impulse response (FIR) filter, implemented in CMOS 350 nm technology. The structure of the filter is based on the switched capacitor technique. In circuits of this type, one of main challenges is an efficient implementation of filter coefficients, which result from several factors described in this work. When implementing such filters as programmable circuits, the values of their coefficients have to be limited to a selected range, i.e. a given resolution in bits. In the implemented prototype filter, the filter coefficients are represented by 6 bits in sign-magnitude notation, so they can take 63 different values only. In such filters, it is not possible to directly implement any frequency response of the filter. Each time, it is necessary to properly round the theoretical values of the coefficients so that they fit into the available range of discrete values resulting from the implementation. The authors of the work designed an algorithm that allows such matching. The paper also presents results of measurements of the prototype chip.

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Switching characteristics of GaN Power Transistors

Switching characteristics of GaN Power Transistors

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2023 Symposia on State-of-the-Art Program on Compound Semiconductors 66 (SOTAPOCS 66) and Gallium Nitride and Silicon Carbide Power Technologies 13, held at the 244th Meeting of The Electrochemical Society

作者： Shur, M.S. Liu, X. Ytterdal, T. Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute TroyNY12180 United States Electronics of the Future Inc. ViennaVA22181 United States University of Trondheim Norway

ISBN: (纸本)9781607685395

A shorter switching time and smaller conduction and switching losses are the key advantages of GaN power devices over Si technology. Further improvements of GaN HEMT technology will require new design approaches including SiC and even, possibly, diamond substrates, gate and drain edge engineering (beyond just using field plates) for optimizing the voltage distribution in the drain-to-gate spacing to using perforated channel design and a low conducting passivation for smoothing or even eliminating the sharp maximum of the electric field in the vicinity of the gate and field plate edges on switching time. © The Electrochemical Society.

关键词： Silicon carbide

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