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arXiv 2024年

作者： Le, Cuong Johansson, Viktor Kok, Manon Wandt, Bastian Department of Electrical Engineering Linköping University Sweden Delft Center for Systems and Control Delft University of Technology Netherlands

Human motion capture from monocular videos has made significant progress in recent years. However, modern approaches often produce temporal artifacts, e.g. in form of jittery motion and struggle to achieve smooth and physically plausible motions. Explicitly integrating physics, in form of internal forces and exterior torques, helps alleviating these artifacts. Current state-of-the-art approaches make use of an automatic PD controller to predict torques and reaction forces in order to re-simulate the input kinematics, i.e. the joint angles of a predefined skeleton. However, due to imperfect physical models, these methods often require simplifying assumptions and extensive preprocessing of the input kinematics to achieve good performance. To this end, we propose a novel method to selectively incorporate the physics models with the kinematics observations in an online setting, inspired by a neural Kalman-filtering approach. We develop a control loop as a meta-PD controller to predict internal joint torques and external reaction forces, followed by a physics-based motion simulation. A recurrent neural network is introduced to realize a Kalman filter that attentively balances the kinematics input and simulated motion, resulting in an optimal-state dynamics prediction. We show that this filtering step is crucial to provide an online supervision that helps balancing the shortcoming of the respective input motions, thus being important for not only capturing accurate global motion trajectories but also producing physically plausible human poses. The proposed approach excels in the physics-based human pose estimation task and demonstrates the physical plausibility of the predictive dynamics, compared to state of the art. The code is available on §. © 2024, CC BY.

关键词： Kinematics

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Electromagnetic Parameters of the Ferrite Materials for Electromagnetic Compatibility

Electromagnetic Parameters of the Ferrite Materials for Elec...

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2023 Radiation and Scattering of Electromagnetic Waves, RSEMW 2023

作者： Serebryannikov, Sergey V. Serebryannikov, Sergey S. Kovalchuk, Valeriya G. Belevtsev, Andrey M. Epaneshnikova, Irina K. Boldyreff, Anton S. National Research University Moscow Power Engineering Institute Department of Physics and Technologies of Electrical Materials and Components Moscow Russia Moscow Aviation Institute National Research University Department 317 Innovation Management Moscow Russia Institute of Radio Engineering Systems and Control Southern Federal University Taganrog Russia

ISBN: (纸本)9798350322378

Composite materials and coatings in the form of bulk samples based on the ferrite compositions (BaCoZn)Fe203 were researched. The connection between dielectric and magnetic magnetic permeability makes it possible to control their magnetic properties [1] by doping the initial composition, as well as by finishing the compositions. The materials are stable system demonstrating a good absorption degree and electromagnetic radiation reflection of the microwave range. The basis of material selection for manufacturing electromagnetic radiation absorber and brief description of the technology for producing ferrite-based composite materials (BaCoZn)Fe203 are presented in the paper. Research results of the frequency characteristics of the powder material in the frequency range of 1 MHz - 12.5 GHz are received. Recommendations about suggested composite material use as the electromagnetic radiation absorber are defined. It is shown that the composite material has great prospects for screening and absorption of EMR purposes, while the effectiveness of screening depends primarily on the type of ceramic material. © 2023 IEEE.

关键词： Electromagnetic wave emission

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Robust controller Design for a Boiler-Turbine Unit 31

Robust Controller Design for a Boiler-Turbine Unit

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31st International Conference on Cybernetics and Informatics, K and I 2022

作者： Kozakova, Alena Capkova, Romana Puleva, Teofana Slovak University of Technology in Bratislava Faculty of Electrical Engineering and Information Technology Bratislava Slovakia Technical University of Sofia Department of Systems and Control Sofia Bulgaria

ISBN: (数字)9781665487757

ISBN: (纸本)9781665487757

The paper deals with modelling and robust controller design for a boiler-turbine unit in the turbo power plant Maritsa Iztok-2. Based on a simplified first principles nonlinear simulation model and related linearized model in form of a 2x2 transfer matrix with a known structure of individual entries, the resulting plant model is obtained as a set of transfer matrices identified from simulation experiments on the nonlinear model in selected operating points. A robust controller with a decentralized structure is designed using the unified robust decentralized controller design method, the core of which is the equivalent subsystems method (ESM). The controller design results are verified by simulation on the linearized as well as the nonlinear models. © 2022 IEEE.

关键词： Robust control

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Investigating Optimal Tracking Intervals for Solar Tracking systems to Enhance Efficiency and Performance

Investigating Optimal Tracking Intervals for Solar Tracking ...

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2024 IEEE International Conference on Artificial Intelligence and Green Energy, ICAIGE 2024

作者： Dahli, Khadidja Ilinca, Adrian Benallal, Abdellah Cheggaga, Nawel University of Blida 1 Electrical and Remote Control Systems Laboratory LabSET Faculty of Technology Blida Algeria Ecole de Technologie Superieure Department of Mechanical Engineering MontrealQC Canada University of Quebec at Rimouski Wind Energy Laboratory RimouskiQC Canada

ISBN: (纸本)9798350389838

Conventional solar trackers continuously adjust solar panels to optimize energy production, a process that can consume significant energy, potentially surpassing the energy gained. This research examines the most effective tracking interval for solar tracking systems to mitigate this issue. Through testing with intervals ranging from 5 minutes to 5 hours, it was determined that setting tracking intervals no shorter than 1 hour and no longer than 2 hours and 30 minutes is recommended to achieve a balance between energy efficiency and production. Additionally, this study suggests that elevation and azimuth angles should not be tracked using the same time periods;instead, a 2-hour interval for elevation tracking and a 3-hour interval for azimuth angle tracking are advised for optimal performance. The proposed discrete tracking method consumes less than 0.15% of the energy produced, thereby enhancing energy efficiency, reducing unnecessary energy consumption, and improving the overall reliability and lifespan of solar tracking systems. This approach has the potential to significantly impact the future of solar power by enhancing the efficiency and reliability of solar tracking systems, thereby increasing the viability and appeal of solar energy as a primary renewable resource. © 2024 IEEE.

关键词： discrete tracking energy efficiency renewable resource solar power solar trackers

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Secondary Frequency control of Dual-Port Grid Forming control

Secondary Frequency Control of Dual-Port Grid Forming Contro...

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Power Tech Conference

作者： Irina Subotic Dominic Groß Automatic Control Laboratory ETH Zürich Switzerland Department of Electrical and Computer Engineering University of Wisconsin-Madison USA

Grid-forming converters are widely envisioned to be the cornerstone of future converter-dominated power systems. However, standard grid forming (GFM) control strategies assume a fully controllable source with enough headroom behind the converter and only implicitly address renewable generation limits through the converter limits. This can lead to instabilities on time scales of both primary and secondary frequency control and jeopardize the safe and reliable operation of electric power systems. In this work, we leverage the recently proposed dual-port GFM control that maps power imbalances in the grid to the power generation interfaced by the power converter. We show that this mechanism allows for considering and transparently addressing limits of renewable generation (e.g., solar photovoltaics and wind) in primary and secondary frequency control. We illustrate that renewable generation using dual-port GFM control can directly integrate into prevailing secondary control methods such as automatic generation control (AGC). Moreover, we discuss the limitations of standard AGC when one or more areas of a power system are dominated by renewable generation and propose an anti-windup strategy to address the power generation limits of renewables. Finally, we verify our findings in a time-domain, electromagnetic transient (EMT) simulation.

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Testing of SLAM methods in the Matlab environment 19

Testing of SLAM methods in the Matlab environment

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19th IEEE World Symposium on Applied Machine Intelligence and Informatics, SAMI 2021

作者： Mihalik, Michal Hrubos, Marian Janota, Ales University of Zilina Faculty of Electrical Engineering and Information Technology Department of Control and Information Systems Zilina Slovakia University of Faculty of Electrical Engineering and Information Technology Department of Control and Information Systems Zilina Slovakia

ISBN: (纸本)9781728180533

This work is focused on establishing TCP/IP connection between SICK LD-OEM 1000 laser scanner and PC. Space measurements will be made using this connection. Then we analyze the data and process it. The data is processed by the Monte Carlo Simultaneous localization and mapping algorithm, which will be used to compile a map of the scanned space. This work is based on MATLAB software environment. © 2021 IEEE.

关键词： MATLAB

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A Behavioral Perspective on Models of Linear Dynamical Networks with Manifest Variables

A Behavioral Perspective on Models of Linear Dynamical Netwo...

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European control Conference (ECC)

作者： Shengling Shi Zhiyong Sun Bart De Schutter Delft Center for Systems and Control Delft University of Technology the Netherlands Department of Electrical Engineering Eindhoven University of Technology the Netherlands

ISBN: (数字)9783907144107

ISBN: (纸本)9798331540920

Networks of dynamical systems play an important role in various domains and have motivated many studies on the control and analysis of linear dynamical networks. For linear network models considered in these studies, it is typically pre-determined what signal channels are inputs and what are outputs. These models do not capture the practical need to incorporate different experimental situations, where different selections of input and output channels are applied to the same network. Moreover, a unified view of different network models is lacking. This work makes an initial step towards addressing the above issues by taking a behavioral perspective, where input and output channels are not pre-determined. The focus of this work is on behavioral network models with only external variables. By exploiting the concept of hypergraphs, novel dual graphical representations, called system graphs and signal graphs, are introduced for behavioral networks. Moreover, connections between behavioral network models and structural vector autoregressive models are established. In addition to their connections in graphical representations, it is shown that the regularity of interconnections is an essential assumption when choosing a structural vector autoregressive model.

关键词： Buildings Europe Directed graphs Vectors Dynamical systems

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The Impact of the Digital Transformation of Education on Literacy 7

The Impact of the Digital Transformation of Education on Lit...

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7th IEEE International Conference and Workshop Obuda on electrical and Power engineering, CANDO-EPE 2024

作者： Farkas, Imre Kovari, Attila Rajcsanyi-Molnar, Monika Institute of Computer Engineering University of Dunaujvaros Department of Computer Systems and Control Technology Dunaujvaros Hungary Eszterházy Károly Catholic University Institute of Digital Technology Faculty of Computer Science Eger Hungary Obuda University Institute of Electronics and Communication Systems Kandó Kálmán Faculty of Electrical Engineering Budapest Hungary John Von Neumann University GAMF Faculty of Engineering and Computer Science Kecskemét Hungary Institute of Social Sciences University of Dunaujvaros Department of Economics and Management Dunaujvaros Hungary

ISBN: (纸本)9798331531119

During the COVID19 epidemic, people of all ages from all walks of life around the world have become inevitably familiar with and almost dependent on the digital tools of the age and the opportunities they offer. A change had to take place very quickly that was unprecedented. This process has also affected education. During the time of the reading lock-in, there was a proliferation of digital curricular content. The second time around, online education came to the fore, thanks to less or well-functioning online platforms, and has since become part of everyday teaching. What is the effectiveness and usefulness of sharing knowledge in this way? Is literacy still needed at all? Can online and hybrid (a controlled mix of face-to-face and online) education replace the well-established contact and face-to-face education? The study show that the respondents believe that online education has had an impact on literacy and that it is perceived to have a positive impact. The results indicate that online education has a positive impact on the literacy levels of students, as it facilitates knowledge acquisition and enhances digital literacy skills. © 2024 IEEE.

关键词： digital education digital literacy digital-informatics literacy

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Non-Convex Potential Games for Finding Global Solutions to Sensor Network Localization

Non-Convex Potential Games for Finding Global Solutions to S...

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European control Conference (ECC)

作者： Gehui Xu Guanpu Chen Yiguang Hong Baris Fidan Thomas Parisini Karl H. Johansson Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Beijing China Division of Decision and Control Systems School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm Sweden Department of Control Science and Engineering Tongji University Shanghai China Shanghai Research Institute for Intelligent Autonomous Systems Shanghai China Department of Mechanical and Mechatronics Engineering University of Waterloo Waterloo ON Canada Department of Electrical and Electronic Engineering Imperial College London London UK Department of Engineering and Architecture University of Trieste Trieste Italy

ISBN: (数字)9783907144107

ISBN: (纸本)9798331540920

Sensor network localization (SNL) problems require determining the physical coordinates of all sensors in a network. This process relies on the global coordinates of anchors and the available measurements between non-anchor and anchor nodes. Attributed to the intrinsic non-convexity, obtaining a globally optimal solution to SNL is challenging, as well as implementing corresponding algorithms. In this paper, we formulate a non-convex multi-player potential game for a generic SNL problem to investigate the identification condition of the global Nash equilibrium (NE) therein, where the global NE represents the global solution of SNL. We employ canonical duality theory to transform the non-convex game into a complementary dual problem. Then we develop a conjugation-based algorithm to compute the stationary points of the complementary dual problem. On this basis, we show an identification condition of the global NE: the stationary point of the proposed algorithm satisfies a duality relation. Finally, simulation results are provided to validate the effectiveness of the theoretical results.

关键词： Location awareness Coordinate measuring machines Simulation Current measurement Noise Europe Games

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Prospects for Using of New Types of Current Transformers for Differential Protection for Transformers

Prospects for Using of New Types of Current Transformers for...

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International Conference on Industrial engineering, Applications and Manufacturing (ICIEAM)

作者： Andrey Yablokov Anton Panashatenko Andrey Tychkin Department of Electric Power Systems Automatic Control "ISPU" Ivanovo State Power Engineering University Ivanovo Russian Federation

The article is devoted to the analysis of the possibilities of improving the methodology for selecting the operation parameters of the longitudinal differential protection of a power transformer when using new types of current transformers such Rogowski Coils, optical current transformers (including digital ones) and their combinations with traditional current transformers. The results of studies of the characteristics of digital transformers are presented, also the heat, repeatability of construction and continuous operating conditions influence on it are shown. Based on anlysis for these studies possible improvements in the methodology for selecting the operation parameters of the differential protection of the transformer are proposed. These improvements can increse the sensitivity and reliability for differential transformer protection.

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