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arXiv 2024年

作者： Han, Dongsheng Wang, Peng Ni, Wanli Wang, Wen Zheng, Ailing Niyato, Dusit Al-Dhahir, Naofal The School of Electrical and Electronic Engineering North China Electric Power University Beijing102206 China Hebei Key Laboratory of Power Internet of Things Technology North China Electric Power University Baoding071003 China The Department of Electronic Engineering Tsinghua University Beijing100084 China The Pervasive Communications Center Purple Mountain Laboratories Nanjing211111 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China The School of Computer Science and Engineering Nanyang Technological University 639798 Singapore The Department of Electrical and Computer Engineering The University of Texas Dallas United States

In this paper, we propose a novel multi-functional reconfigurable intelligent surface (MF-RIS) that supports signal reflection, refraction, amplification, and target sensing simultaneously. Our MF-RIS aims to enhance integrated communication and sensing (ISAC) systems, particularly in multi-user and multi-target scenarios. Equipped with reflection and refraction components (i.e., amplifiers and phase shifters), MF-RIS is able to adjust the amplitude and phase shift of both communication and sensing signals on demand. Additionally, with the assistance of sensing elements, MF-RIS is capable of capturing the echo signals from multiple targets, thereby mitigating the signal attenuation typically associated with multi-hop links. We propose a MF-RIS-enabled multi-user and multi-target ISAC system, and formulate an optimization problem to maximize the signal-to-interference-plus-noise ratio (SINR) of sensing targets. This problem involves jointly optimizing the transmit beamforming and MF-RIS configurations, subject to constraints on the communication rate, total power budget, and MF-RIS coefficients. We decompose the formulated non-convex problem into three sub-problems, and then solve them via an efficient iterative algorithm. Simulation results demonstrate that: 1) The performance of MF-RIS varies under different operating protocols, and energy splitting (ES) exhibits the best performance in the considered MF-RIS-enabled multi-user multi-target ISAC system;2) Under the same total power budget, the proposed MF-RIS with ES protocol attains 52.2%, 73.5%, and 60.86% sensing SINR gains over active RIS, passive RIS, and simultaneously transmitting and reflecting RIS (STAR-RIS), respectively;3) The number of sensing elements will no longer improve sensing performance after exceeding a certain number. © 2024, CC BY.

关键词： Budget control

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Ensuring Transient Stability with Guaranteed Region of Attraction in DC Microgrids

arXiv

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arXiv 2022年

作者： Liu, Jianzhe Zhang, Yichen Conejo, Antonio J. Qiu, Feng The Energy Systems Division Argonne National Laboratory LemontIL60439 United States The Department of Integrated Systems Engineering The Department of Electrical and Computer Engineering The Ohio State University ColumbusOH United States

DC microgrids have promising applications in renewable integration due to their better energy efficiency when connecting DC components. However, they might be unstable since many loads in a DC microgrid are regulated as constant power loads (CPLs) that have a destabilizing negative impedance effect. As a result, the state trajectory displacement caused by abrupt load changes or contingencies can easily lead to instability. Many existing works have been devoted to studying the region of attraction (ROA) of a DC microgrid, in which the system is guaranteed to be asymptotically stable. Nevertheless, existing work either focuses on using numerical methods for ROA approximations that generally have no performance guarantees or cannot ensure a desired ROA for a general DC microgrid. To close this gap, this paper develops an innovative control synthesis algorithm to make a general DC microgrid have a theoretically guaranteed ROA, for example, to cover the entirety of its operating range regarding state trajectories. We first study the nonlinear dynamics of a DC microgrid to derive a novel transient stability condition to rigorously certify whether a given operating range is a subset of the ROA;then, we formulate a control synthesis optimization problem to guarantee the condition's satisfaction. This condition is a linear constraint, and the optimization problem resembles an optimal power flow problem and has a good computational behavior. Simulation case studies verify the validity of the proposed work. Copyright © 2022, The Authors. All rights reserved.

关键词： Stability

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State Derivative Normalization for Continuous-Time Deep Neural Networks

arXiv

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arXiv 2024年

作者： Weigand, Jonas Beintema, Gerben I. Ulmen, Jonas Görges, Daniel Tóth, Roland Schoukens, Maarten Ruskowski, Martin Chair of Machine Tools and Control Systems RPTU Kaiserslautern The German Research Center for Artificial Intelligence Kaiserslautern Germany Group The Department of Electrical Engineering Eindhoven University of Technology Netherlands The Systems and Control Laboratory The Institute for Computer Science and Control Budapest Hungary Institute for Electromobility RPTU Kaiserslautern Germany

The importance of proper data normalization for deep neural networks is well known. However, in continuous-time state-space model estimation, it has been observed that improper normalization of either the hidden state or hidden state derivative of the model estimate, or even of the time interval can lead to numerical and optimization challenges with deep learning based methods. This results in a reduced model quality. In this contribution, we show that these three normalization tasks are inherently coupled. Due to the existence of this coupling, we propose a solution to all three normalization challenges by introducing a normalization constant at the state derivative level. We show that the appropriate choice of the normalization constant is related to the dynamics of the to-be-identified system and we derive multiple methods of obtaining an effective normalization constant. We compare and discuss all the normalization strategies on a benchmark problem based on experimental data from a cascaded tanks system and compare our results with other methods of the identification literature. © 2024, CC BY-SA.

关键词： Ordinary differential equations

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State Estimation for Integrated Energy systems: Motivations, Advances, and Future Work

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IEEE Transactions on Power systems 2024年

作者： Zhao, Junbo Srivastava, Ankur Guo, Ye Cetenovic, Dragan Lin, Yuzhang Levi, Victor Yin, Guanxiong Huang, Manyun Zhang, Tingting Li, Zhigang Chen, Yanbo Exposito, Antonio G. Zhang, Wen Zheng, Weiye Chakrabarti, Saikat Li, Yang Sharma, Ankush Kamwa, Innocent Guo, Qinglai Terzija, Vladimir Mili, Lamine University of Connecticut Department of Electrical and Computer Engineering StorrsCT06269 United States Tsinghua University Tsinghua-Berkeley Shenzhen Institute Shenzhen518055 China The University of Manchester Department of Eee ManchesterM13 9PL United Kingdom University of Kragujevac Faculty of Technical Sciences Čačak Čačak32000 Serbia New York University Department of Electrical and Computer Engineering NY11201 United States Tsinghua University Department of Electrical Engineering Beijing100084 China Hohai University College of Energy and Electrical Engineering Nanjing210098 China Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Jinan250061 China The Chinese University of Hong Kong-Shenzhen School of Science and Engineering Shenzhen518172 China North China Electric Power University School of Electrical and Electronic Engineering Beijing102206 China University of Sevilla Spain Sevilla41092 Spain South China University of Technology School of Electrical Power Engineering Guangzhou510641 China Indian Institute of Technology Kanpur Department of Electrical Engineering Kanpur208016 India Northeast Electric Power University School of Electrical Engineering Jilin132012 China Laval University Department of Electrical and Computer Engineering QuebecQCG1V 0A6 Canada Tsinghua University State Key Laboratory of Power Systems Department of Electrical Engineering Beijing100084 China Newcastle University School of Engineering Newcastle upon TyneNE1 7RU United Kingdom Virginia Polytechnic Institute and State University Bradley Department of Electrical and Computer Engineering Falls ChurchVA22043 United States

This paper summarizes the technical activities of a three-year-long IEEE Task Force (TF) on State Estimation (SE) for Integrated Energy systems (IES). It presents the formal definition and characteristics of IES, along with the comprehensive discussion on Electric Power systems (EPS) model, and static and dynamic models associated with heating and natural gas systems. The paper also identifies the barriers of SE for IES, such as estimation modeling, observability analysis, and measurement requirements, together with addressing multi-scale dynamics. An extensive comparative analysis between Integrated Energy systems-State Estimation (IES-SE) and more established Electric Power System-State Estimation (EPS-SE) is presented. The paper also provides future research needs and directions related to IES-SE. © 1969-2012 IEEE.

关键词： Power system analysis

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Bilateral Teleoperation Control Using Unified Interactive Model for Manipulation in Contact Environment*

Bilateral Teleoperation Control Using Unified Interactive Mo...

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IEEE International Conference on Robotics and Biomimetics

作者： Xiao Yang Fanghao Huang Jason Gu Zheng Chen State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University Hangzhou China Ocean College Zhejiang University Zhoushan China Department of Electrical and Computer Engineering Dalhousie University Halifax Canada Zhejiang Laboratory Hangzhou China

In this paper, a novel bilateral teleoperation control is designed specifically for manipulation in contact environment. Firstly, serval interaction conditions (e.g., free motion and rigid interaction) are defined and unified into one equation as the designed unified interactive model, which can also be utilized as a control objective. Based on this model, a remote hybrid motion/force controller is designed for remote robot, which achieves the good position and force tracking, and ensures the precise and safe contact force that helps reduce the workload of operator. Subsequently, the contact force is reconstructed in the local side by estimating and transmitting the non-power environment coefficient from remote side, which provides the operator with accurate force feedback. Since the coefficient replaces the direct transmission of force signal in the communication channel, the traditional power-cycle problem is essentially avoided, which guarantees the stability of teleoperation system under communication time delays. Comparative experiments are implemented to verify the effectiveness of proposed method for teleoperated manipulation.

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Closed-Form Hilbert Projection for Quantum State Observers

Closed-Form Hilbert Projection for Quantum State Observers

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American Control Conference (ACC)

作者： Maison Clouâtré Mark Balas Makhin Thitsa Department of Mechanical Engineering Texas A&M University College Station Texas USA Department of Electrical & Computer Engineering Mercer University Macon Georgia USA Laboratory for Information & Decision Systems (LIDS) Massachusetts Institute of Technology Cambridge Massachusetts USA

Designing an observer of an unknown quantum density operator is difficult because the operator must be Hermitian positive semidefinite with unit trace. In this paper, we derive a closed-form solution for projecting an arbitrary matrix onto the set of valid density operators. This allows us to design linear quantum state observers and retract the observer’s state back to this set while retaining the exponential convergence rate of the linear observer. The derived closed-form projection can be used alongside any quantum state estimation technique to produce a valid state estimate without increasing the state estimation error.

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GUEST EDITORIAL

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China Communications 2023年第2期 3-6页

作者： Yuan Wu Xu Chen Feng Lyu Xianfu Chen Xumin Huang Jie Gao Yueyue Dai Tony Q.S.Quek Yan Zhang the State Key Laboratory of Internet of Things for Smart City University of Macau the Department of Computer and Information Science University of Macau Sun Yat-sen University Sun Yat-sen University Institute of Advanced Networking and Computing Systems Sun Yat-sen University National and Local Joint Engineering Laboratory the School of Computer Science and Engineering Central South University the VTT Technical Research Centre of Finland the School of Automation Guangdong University of Technology the School of Information Technology Carleton University Huazhong University of Science and Technology Singapore University of Technology and Design(SUTD) the IEEE Communications Society Technical Committee on Green Communications and Computing(TCGCC)

With the growing maturity of the advanced edge-cloud collaboration and integrated sensing-communication-computing systems, edge intelligence has been envisioned as one of the enabling technologies for ubiquitous and l...

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Low-Power Envelope Detector for WSN Wake-up Receiver Applications

Low-Power Envelope Detector for WSN Wake-up Receiver Applica...

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IEEE International Conference on Design & Test of Integrated Micro & Nano-systems (DTS)

作者： Mariem Bouraoui Amel Neifar Imen Barraj Mohamed Masmoudi Electrical Engineering Department Systems Integration and Emerging Energies Laboratory National Engineers School of Sfax University of Sfax Sfax Tunisia National Engineers School of Gabes University of Gabes Tunisia Department of Computer Engineering College of Computer Engineering and Sciences Prince Sattam Bin Abdulaziz University Al-Kharj Saudi Arabia

This paper highlights the importance of the wake-up receiver in applications using WSN while offering a brief description of this element. In this work, the design of a low-power envelope detector for wake-up receiver applications is presented. By using RF-TSMC CMOS 0.18μm, the proposed envelope circuit is designed for 52 GHz frequency. The forward body biasing method is employed to decrease the circuit energy consumption. The proposed circuit can achieve 152MHz cut-off frequency over the operating frequency range and has power dissipation of 87.5μW under 1V.

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Optical data transmission using inverse-designed silicon multimode photonic circuits and spectrally flattened microcombs

Optical data transmission using inverse-designed silicon mul...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Yang, K.Y. Shirpurkar, C. White, A.D. Zang, J. Chang, L. Ashtiani, F. Guidry, M.A. Lukin, D.M. Pericherla, S.V. Yang, J. Kwon, H. Lu, J. Ahn, G.H. Van Gasse, K. Jin, Y. Yu, S.-P. Briles, T.C. Stone, J.R. Carlson, D.R. Song, H. Zou, K. Zhou, H. Pang, K. Hao, H. Trask, L. Li, M. Netherton, A. Rechtman, L. Stone, J.S. Skarda, J.L. Su, L. Vercruysse, D. MacLean, J.P.W. Aghaeimeibodi, S. Li, M.-J. Miller, D.A.B. Marom, D.M. Willner, A.E. Bowers, J.E. Papp, S.B. Delfyett, P.J. Aflatouni, F. Vučković, J. E.L.Ginzton Laboratory Stanford University StanfordCA United States John A. Paulson School of Engineering and Applied Sciences Harvard University CambridgeMA United States The College of Optics and Photonics University of Central Florida OrlandoFL United States Time and Frequency Division National Institute of Standards and Technology BoulderCO United States Department of Physics University of Colorado BoulderCO United States Department of Electrical and Computer Engineering University of California Santa BarbaraCA United States Department of Electrical and Systems Engineering University of Pennsylvania PhiladelphiaPA United States SPINS Photonics Incorporated HollisterCA United States Octave Photonics LouisvilleCO United States Department of Electrical and Computer Engineering University of Southern California Los AngelesCA United States Applied Physics Department The Hebrew University of Jerusalem Jerusalem Israel Corning Incorporated CorningNY United States

We demonstrate a 1.12-Tbps error-free data transmission throughout inverse-designed multimode photonic circuits using spectrally flattened microcombs as a multiwavelength laser source. © Optica Publishing Group 2... 详细信息

ISBN: (纸本)9781957171258

关键词： Timing circuits

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Improving the quality of the power supply during the period of covid-19 using plug-in electric vehicles and artificial intelligence

Improving the quality of the power supply during the period ...

引用

International Conference on Sciences and Techniques of Automatic Control and computer engineering (STA)

作者： Kouame Emmanuel Kouakou Mouna Rekik Lotfi Krichen Electrical Engineering Department Electrical systems and renewable energies Laboratory (LSEER) University of Sfax National Engineering School of Sfax (ENIS) Sfax Tunis Electrical Engineering Department Electrical systems and renewable energies Laboratory (LSEER) University of Sfax University of Gabes National Engineering School of Sfax (ENIS) Higher Institute of Computer Science and Multimedia of Gabes (ISIMG) Sfax Gabes Tunis

ISBN: (纸本)9781665482622

COVID-19, corona virus disease, has been ravaging the world since the last quarter of 2019. To address this threat, the World Health Organization (WHO) has established a list of priority medical equipment that must be used by hospitals and clinics. These equipments are in fact non-linear harmonic-producing loads that have a detrimental effect on the devices and degrade the quality of the power supply. In this paper a parallel active filter: a neuronal harmonic compensation strategy based on plug-in electric vehicles (PEVs) connected to the charging stations in the parking lot of hospitals and clinics and artificial intelligence is proposed in order to improve the quality of power supply thus protecting medical equipment in order to save lives. This strategy will be simulated in MATLAB and the results will be presented as evidence of its effectiveness.

关键词： COVID-19 Plug-in electric vehicles Biomedical equipment Hospitals Power quality Organizations Harmonic analysis

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