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17th International Conference on engineering of Modern Electric systems, EMES 2023

作者： Magdoiu, Liliana Doina Caciora, Simona Veronica Abrudan Pacala, Anca Gamcova, Maria University of Oradea Control Systems Engineering and Management Department Oradea Romania Technical University of Kosice Faculty of Electrical Engineering and Informatics Kosice Slovakia

ISBN: (纸本)9798350310634

The life cycle of a petroleum product reflects the evolution of its sales volume over time and represents the interval between its introduction on the market and its definitive disappearance from the commodity exchange arena. During the life cycle of a petroleum product, the company marketing it will keep on reformulating the adopted marketing strategies, as determined by variable conditions and new challenges on the side of the competition, along with the changes in customers' interests and their requirements in relation to the product;therefore, appropriate marketing strategies must be developed for each stage in the life cycle of the petroleum product in order to increase its marketing profitability, even though its existence is limited over time. © 2023 IEEE.

关键词： Life cycle

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A Moreau Envelope Approach for LQR Meta-Policy Estimation 63

A Moreau Envelope Approach for LQR Meta-Policy Estimation

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63rd IEEE Conference on Decision and control, CDC 2024

作者： Aravind, Ashwin Toghani, Mohammad Taha Uribe, Cesar A. Iit Bombay Centre for Systems and Control MH Mumbai India Rice University Department of Electrical and Computer Engineering HoustonTX United States

ISBN: (纸本)9798350316339

We study the problem of policy estimation for the Linear Quadratic Regulator (LQR) in discrete-time linear timeinvariant uncertain dynamical systems. We propose a Moreau Envelope-based surrogate LQR cost, built from a finite set of realizations of the uncertain system, to define a meta-policy efficiently adjustable to new realizations. Moreover, we design an algorithm to find an approximate first-order stationary point of the meta-LQR cost function. Numerical results show that the proposed approach outperforms naive averaging of controllers on new realizations of the linear system. We also provide empirical evidence that our method has better sample complexity than Model-Agnostic Meta-Learning (MAML) approaches. © 2024 IEEE.

关键词： Cost functions

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FABLE: A Bundle Method For Federated Learning In Wireless systems

FABLE: A Bundle Method For Federated Learning In Wireless Sy...

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2025 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2025

作者： Cederberg, Daniel Larsson, Erik G. Johansson, Mikael Department of Electrical Engineering Stanford University Stanford United States Department of Electrical Engineering Linköping University Linköping Sweden Division of Decision and Control Systems KTH Royal Institute of Technology Stockholm Sweden

ISBN: (纸本)9798350368741

This paper presents a comprehensive approach to federated learning in wireless networks. We discuss communication strategies that address packet loss and bitrate limitations in both uplink and downlink transmissions, and introduce FABLE, a novel optimization algorithm designed to operate effectively under these network constraints. The algorithm also supports non-smooth regularizers and accommodates heterogeneous data distributions across clients. We provide theoretical convergence guarantees under gradient compression and asynchronous operation, and demonstrate the efficiency of our approach through numerical experiments. © 2025 IEEE.

关键词： Federated learning optimization algorithms wireless communications

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Game theory system optimization in a supplier-customer transport network 10

Game theory system optimization in a supplier-customer trans...

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10th International Conference on Information Technology and Quantitative Management, ITQM 2023

作者： Bilbiie, Radu Popescu, Dumitru Dimon, Catalin Teme, Marius Borne, Pierre Department of Automatic Control and Systems Engineering University Politehnica of Bucharest Bucharest Romania Ecole Centrale de Lille Villeneuve d'Ascq France

The development of modern IT technologies and resources, offer in many economic-industrial applications, efficient solutions for planning and managing of specific activities. New research directions in the field of management and optimization of supply-customer (SC) systems are defined and evaluated. The paper proposes a management model based on a causal graph structure, which expresses the connection and interdependence between the two entities involved in the specific activities of the field, the suppliers of goods and services and the consumers of these goods and products. Information related to production and storage capacity, up-to-date requirements for customer needs, delivery planning, production and consumption dynamics are considered. The transport between the actors involved in the system is an important component with weight in the costs of supply-sale activities. The optimal solution for the supply-customer transport system is proposed based on different strategies of game theory. © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://***/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Tenth International Conference on Information Technology and Quantitative Management.

关键词： Game theory

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Stereographic Projection of Probabilistic Frequency-Domain Uncertainty 63

Stereographic Projection of Probabilistic Frequency-Domain U...

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63rd IEEE Conference on Decision and control, CDC 2024

作者： Nystrom, Anton Renganathan, Venkatraman Cantoni, Michael Lund University Faculty of Engineering Sweden Cranfield University United Kingdom Lund University Department of Automatic Control - Lth Sweden Lund University Elliit Strategic Research Area Sweden The University of Melbourne Department of Electrical and Electronic Engineering Australia

ISBN: (纸本)9798350316339

This paper investigates the stereographic projection of points along the Nyquist plots of single input single output (SISO) linear time invariant (LTI) systems subject to probabilistic uncertainty. At each frequency, there corresponds a complex-valued random variable with given probability distribution in the complex plane. The chordal distance between the stereographic projections of this complex value and the corresponding value for a nominal model, as per the well-known ν-Gap metric of Vinnicombe, is also a random quantity. The main result provides the cumulative density function (CDF) of the chordal distance at a given frequency. Such a stochastic distance framework opens up a fresh and a fertile research direction on probabilistic robust control theory. © 2024 IEEE.

关键词： Frequency domain analysis

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A New Task-Space Neural Nonlinear control Approach for Robotic Manipulators under Joint Constraints

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IEEE Access 2025年 13卷 91945-91956页

作者： Nguyet, Nguyen Tran Minh Ba, Dang Xuan Faculty of Electrical and Electronics Engineering Department of Automatic Control Ho Chi Minh City71307 Viet Nam

Robotic manipulators are nonlinear systems with multi-input multi-output (MIMO) structures, uncertainties, and time-varying dynamical prospects. Unexpected influences of internal and external disturbances along with physical constraints in complicated kinematic configurations are large barriers for deriving excellent controllers of the manipulators. In this paper, we propose a novel two-level control approach to drive the end-effector of robotic manipulators following referenced profiles within the hard bounds of joint angles without using inverse kinematics solutions. A new Cartersian-based high-level sub controller is designed for calculating the desired angular velocities from the task-space control objective throughout a constrained-to-free transformation operator. An advanced sliding mode control framework is adopted to construct the low-level control layer to realize the indirect joint-control missions given from the upper one within the physical bounds. To effectively suppress the dynamical internal and external disturbances, a new neural network with a flexible nonlinear learning law is integrated in the joint-space sub controller. Stability of the whole system including both Cartersian and joint spaces is thoroughly proven by a Lyapunov function under a special constraint. The designed controller was verified on a two-link planar robotic arm in various challenging conditions and in comparing with other state-of-the-art control methods. The in-depth simulation results exhibited that the proposed control algorithm possesses outperformance working abilities such as model-free adaptation, robustness, high accuracy and comprehensiveness. © 2013 IEEE.

关键词： Robotic arms

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Experimental Efficiency Comparison Between the LLC Resonant Converter and the Phase Shifted Full Bridge Converter Operating as Battery Chargers 50

Experimental Efficiency Comparison Between the LLC Resonant ...

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50th Annual Conference of the IEEE Industrial Electronics Society, IECON 2024

作者： López-Santos, Oswaldo Zambrano-Prada, David A. Valderrama-Blavi, Hugo Flores-Bahamonde, Freddy Torres Pinzón, Carlos A. Martínez-Salamero, Luis Department of Electrical Electronic and Automatic Control Engineering Universitat Rovira I Virgili Tarragona Spain Energy Transformation Center Engineering Faculty Universidad Andrés Bello Santiago Chile Faculty of Electronic Engineering Universidad Santo Tomás Bogotá Colombia

ISBN: (纸本)9781665464543

DC-DC conversion in electric vehicle chargers can require a single or multiple stages depending on both electrical architecture and amount of processed power. When isolation is provided by an output stage, a unidirectional isolated DC-DC converter is required. Among the possible candidates, the LLC resonant converter and the phase shifted full-bridge (FSFB) converter show several advantages which has made them preferred choices in recent literature. This paper compares the efficiency of both converters on equal basis under the variable load conditions imposed by a cycle of the conventional constant-current constant-voltage (CC-CV) charging protocol. To support the study, scale-down experimental prototypes of both converters have been implemented and evaluated in laboratory showing the superiority of the LLC resonant converter for almost the entire range of operation. © 2024 IEEE.

关键词： Resonant converters

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Research to Improve the Quality of Servo Motor controller 5

Research to Improve the Quality of Servo Motor Controller

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5th International Conference on control in Technical systems, CTS 2023

作者： Giang, Hoang Thi Thu Chung, Phan Thanh Van, Tran Thuy Khanh, Nguyen Duy HaNoi University of Industry Faculty of Electrical Engineering Hanoi Viet Nam Military Institute of Mechanical Engineering Department for Standards Metrology and Quality Hanoi Viet Nam Saint Petersburg Electrotechnical University 'LETI' Department of Automatic Control Systems Saint Petersburg Russia

ISBN: (纸本)9798350304664

To overcome the disadvantages that traditional controllers bring, in this study, it is proposed to use fractional order controller PIλ instead of conventional PI controller, the research also focuses on improving the quality of the controller. the order controller itself by selecting the computational methods, the discretization methods, and the implementation methods that give the best results. The study conducted simulations and experiments and compared the results with conventional PI controllers, in order to demonstrate the effectiveness of the fractional order controller. © 2023 IEEE.

关键词： controllers

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Second-Order Discrete-Analog Filters on Switched Capacitors with Two Electronic Keys

Second-Order Discrete-Analog Filters on Switched Capacitors ...

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2024 IEEE Ural-Siberian Conference on Biomedical engineering, Radioelectronics and Information Technology, USBEREIT 2024

作者： Denisenko, Darya Prokopenko, Nikolay Butyrlagin, Nikolay Ivanov, Yuri Don State Technical University Department Of Scientific Research Russia Southern Federal University Department Of Automatic Control Systems Rostov-on-Don Russia Don State Technical University Department Of Information Systems And Radio Engineering Rostov-on-Don Russia

ISBN: (纸本)9798350362893

Two new modifications of second-order low-frequency discrete-analog filters (DAFs) based on switched capacitors with two electronic keys have been developed and investigated. The first modification contains a resistive signal adder based on a buffer amplifier, in the second modification the signal adder is implemented on a differential difference operational amplifier. The basic formulas for the transmission coefficient at zero frequency and pole frequency, and also a frequency and attenuation of the pole are given. The transmission coefficient of new circuits in the passband does not depend on the capacitances of the frequency-setting capacitors. Computer modeling was performed in the Micro-Cap environment, which confirms the coincidence of the calculated main parameters of the DAF and their time characteristics. The developed DAFs were studied at various input signal frequencies, which differ by several orders of magnitude, including the low, medium and high frequency ranges. It is shown that the graph of the DAF output signal has a 'step' character, which corresponds to the physical processes of signal conversion in filters of the class under consideration. The low parametric sensitivity of presented DAF circuits is achieved by the fact that the pole attenuation and transmission coefficient of such DAFs cease to depend on the parameters of the tuning elements. © 2024 IEEE.

关键词： Poles

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Enhancing 3D Human Skeleton Key-point Detection through Weakly Supervised Learning and Multi-level Attention Mechanisms

Enhancing 3D Human Skeleton Key-point Detection through Weak...

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2023 IEEE EMBS Special Topic Conference on Data Science and engineering in Healthcare, Medicine and Biology, IEEECONF 2023

作者： Xu, Meng Gong, Yuanhao Dogramadzi, Sanja University of Sheffield Department of Automatic Control and Systems Engineering SheffieldS10 2TN United Kingdom Shenzhen University Faculty of Electronics and Information Engineering China

ISBN: (纸本)9798350383386

With the soaring interest in understanding the dynamics of human body skeletons for applications such as action recognition and video understanding, the significance of precise 3D key-point detection has become increasingly prominent. Despite the advancements, existing approaches struggle to address the issues of occlusions and limited annotated data. This paper proposes a novel framework integrating a multilevel attention mechanism and weakly supervised 3D key-point generation to tackle these prevalent issues, enhancing both the accuracy and efficiency of human pose estimation. © 2023 IEEE.

关键词： Musculoskeletal system

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