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Prescribed-Time Consensus of Multi-Agent Systems with Distributed Time-Varying Dynamic Event-Triggered Strategy

Prescribed-Time Consensus of Multi-Agent Systems with Distri...

引用

International Conference on Information Science and technology (ICIST)

作者： Meilin Li Tieshan Li School of Automation Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9798350353334

ISBN: (纸本)9798350353341

In this paper, the prescribed-time consensus control problem for multi-agent systems under undirected communication topology is considered. First, in order to save communication resource among agents, a dynamic event-triggered mechanism based on intermittent communication strategy is proposed. Additionally, the triggering conditions can be evaluated without real-time monitoring of neighboring agents' states and the communication resources of the whole closed-system can be greatly reduced. Then, a distributed control protocol based on a time-varying gain formulated by the parametric Lyapunov equation is presented to achieve the prescribed-time consensus control. Furthermore, the expression of the minimum inter-event time which has a strict positive lower bound is derived. Finally, the feasibility of the designed control method is validated through simulation results.

关键词： Protocols Event detection Simulation Switches Consensus control Real-time systems Mathematical models Topology Time-varying systems Multi-agent systems

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A Comprehensive Validity Analysis of Extended Boundary Condition Method in Electromagnetic Scattering from Random Rough Surfaces: Ill-Conditioning, and Energy Conservation

A Comprehensive Validity Analysis of Extended Boundary Condi...

引用

IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Jiaxing Yang Ling Tong Yuchuan Wang Shangtao Qin School of Automation Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9798350360325

ISBN: (纸本)9798350360332

Extended Boundary Condition Method (EBCM) is a highly efficient technique utilized for the analysis of electromagnetic (EM) scattering from periodic or quasi-periodic surfaces. This article investigates the validity of EBCM when it comes to solving the EM scattering from random rough surfaces. Two advanced EBCM techniques were evaluated on three distinct types of rough surfaces. Simulations were performed to ascertain the valid range of EBCM to rough surfaces with varied attributes. An indicator for ill-conditioned matrices is introduced, and the conservation of energy is scrutinized under a variety of conditions. Ultimately, it has been empirically verified that the validity of the EBCM is confined to surfaces with specific characteristics.

关键词： Correlation Monte Carlo methods Electromagnetic scattering Energy conservation Geoscience and remote sensing Boundary conditions Surface roughness

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FedRS-Net: A Federated Learning Approach for Collaborative Multi-Modal Maritime Analytics

FedRS-Net: A Federated Learning Approach for Collaborative M...

引用

International Conference on Information Fusion

作者： Bole Wilfried Tienin Guolong Cui Yannick Abel Talla Nana Chiagoziem Chima Ukwuoma Roldan Mba Esidang Mohammed Raouf Senouci School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu China School of Information Science and Technology Southwest Jiaotong University Chengdu China College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9781737749769

ISBN: (纸本)9798350371420

Ensuring the safety and security of our oceans demands a comprehensive Maritime Situational Awareness (MSA) strategy. However, this task has several challenges, including using multi-modal data, data sharing among agencies, privacy concerns, and bandwidth limitations. To address these challenges, this research introduced FedRS-Net. FedRS-Net is a federated deep learning framework that trains multi-modal remote sensing data without exposing client data. The system employs a communication-efficient federated averaging algorithm and a novel convolutional neural network architecture called Redesigned Skip Connection. It integrates synthetic aperture radar (SAR) and optical satellite imageries to achieve remarkable results. Extensive experiments were conducted on the maritime vessel datasets, resulting in a testing accuracy of $99.8 \%$. Further, applying secure aggregation and momentum-based gradient compression reduced communication costs by $\mathbf{7 \%}$. FedRS-Net overcomes privacy concerns and facilitates agency collaboration by enabling collective maritime monitoring through decentralized data. This research provides a robust federated learning solution tailored for multi-modal remote sensing analytics applications.

关键词： Integrated optics Data privacy Accuracy Federated learning Collaboration Optical imaging Satellite images Optical sensors Synthetic aperture radar Remote sensing

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A Lower-Correlation Random Demodulator Architecture Using Random Sampling Period Zeroing Integration Method

A Lower-Correlation Random Demodulator Architecture Using Ra...

引用

European Signal Processing Conference (EUSIPCO)

作者： Yanjun Yan Chuanrong Liu Yijiu Zhao Houjun Wang Lei Qian Kai Chen Yifan Wang School of Automation Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9789464593617

ISBN: (纸本)9798331519773

Compressed Sampling (CS) overcomes the oversam-pling trap caused by using Shannon's sampling theorem in sparse ultra-wideband signals. The Random Demodulator (RD) is the infrastructure for compressive sampling, which uses a random sequence to induce an aliasing spectrum, then passes through a filter (equivalent integrator) and sampled at a low rate. Numer-ous scholarly works have been refined and optimized utilizing this framework. This work also proposes an optimized, lower-correlation RD framework named Random Sampling Period Ze-roing Integrator (RSPZI). It retains the aliasing sequences $P_{c}$ and period reset integrator of RD while using a randomly triggered holders (Matrix operations are accumulations of pseudo-random intervals) of Analog-to-Digital Converter (ADC) to smear the tones and increase the reconstruction probability. This work gives a possible solution for constructing an RSPZI and explains why the RSPZI can smear the tones, allowing us to recover the full frequency band from the baseband samples. Furthermore, we mathematically demonstrate that RSPZI has a lower correlation between the sparse and compressed matrices compared to RD. Therefore, the probability of exact reconstruction of RSPZI is higher. Experimental results support these conclusions.

关键词： Correlation Baseband Europe Signal processing Sparse matrices Matrix converters Optimization Demodulation Ultra wideband technology Random sequences

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A Plug-in OCT Module for in Situ Live Monitoring of Laser Processing

A Plug-in OCT Module for in Situ Live Monitoring of Laser Pr...

引用

IEEE SENSORS

作者： Jinhan Zhao Chaoliang Zhang Jiangshan Ai Yaoyu Ding School of Automation Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9798350363517

ISBN: (纸本)9798350363524

This paper presents a novel design of an Optical Coherence Tomography (OCT) module that is pluggable into all kinds of existing laser heads in industrial applications. The current method of coupling OCT with a laser head needs customized light-splitting optics inside the laser head, which bounds the OCT and laser head manufacturers, hence hindering a wider application of OCT in the monitoring of laser processing. For the existing laser heads in service that need to add the function of OCT monitoring, one needs to open up the laser head, install the dichroic mirror, and tune the optics, which is time-consuming and runs the risk of damaging the laser head. In addition, the existing OCT coupling method shoots the probe beam through the thick focus lens for high power laser beam, which degrades the signal strength and introduces dispersion issue. To address these issues, we propose a laser head-independent OCT module that functions as a plug-in component, which avoids interference with the laser head and works fully independent. The test demonstrates the feasibility of the plug-and-play solution for new independent OCT products and updating the existing laser head with OCT function with seamless integration and un-degraded performance.

关键词： Couplings Head Lasers Laser tuning Laser beams Optical sensors Steel Laser applications Monitoring Signal detection

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Distributed Unknown Input Observer-Based Global Fault-Tolerant Average Consensus Control for Linear Multi-Agent Systems

Distributed Unknown Input Observer-Based Global Fault-Tolera...

引用

International Conference on Information Science and technology (ICIST)

作者： Ximing Yang Tieshan Li Yue Long Hanqing Yang School of Automation Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9798350353334

ISBN: (纸本)9798350353341

The paper mainly investigates the distributed unknown input observer-based global fault-tolerant average consensus control problem for multi-agent systems (MASs). First, a distributed unknown input observer based on relative estimation error is proposed, which can effectively reduce the impact of external disturbances and achieve accurate estimation of the agent states and the faults they suffered. Then, based on the obtained accurate estimations and using the relative estimation error, a global fault-tolerant average consensus controller is proposed. The proposed controller can compensate for the effects of faults and enable the MASs to achieve global average consensus. Finally, simulations are given to verify the effectiveness of the proposed scheme.

关键词： Fault tolerance Estimation error Information science Accuracy Fault tolerant systems Consensus control Observers Control systems Multi-agent systems

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A Fast dynamic droop control strategy based on output impedance for DC microgrids

A Fast dynamic droop control strategy based on output impeda...

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International Conference on Power Electronics and Motion Control (IPEMC)

作者： Zhangyong Chen Yunyan Liu Tieqi Wang School of Automation Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9798350351330

ISBN: (纸本)9798350351347

With the development of renewable and distributed energy sources, DC microgrids(Mgs) are widely used in various microgrid fields due to their advantages of no AC-DC conversion, high efficiency, and no harmonic, synchronization, and reactive power problems. In this paper, a dynamic droop control is proposed, where an additional dynamic droop term is added to the conventional droop control to form a two-degree-of-freedom droop structure, which improves the dynamic tracking performance of the system without affecting the power regulation of the conventional droop control. In this paper, the output impedance of the conventional droop control system is firstly pushed to in detail to demonstrate that the droop coefficient of the original droop system affects both the linearized power regulation performance and the dynamic performance. At the same time, the output impedance of the system of the proposed method is also pushed to the comparison of the output impedance of this method, and the dynamic parameters of the original system are improved by reasonable design parameters. Finally, simulations and experiments verify the correctness of the proposed method.

关键词： Renewable energy sources Reactive power Dynamics Microgrids Dynamic scheduling Regulation Steady-state

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Resilient Privacy-Preserving Consensus of Cooperative-Competitive Multi-Agent Systems under Byzantine Agents

Resilient Privacy-Preserving Consensus of Cooperative-Compet...

引用

Chinese Control and Decision Conference, CCDC

作者： Jiayue Ma Jiangping Hu School of Automation Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9798350387780

ISBN: (纸本)9798350387797

This paper investigates secure and privacy-preserving consensus control for cooperative-competitive multi-agent systems (MASs) under Byzantine attacks. Considering that agents simultaneously interact cooperatively and competitively, we introduce a novel differential private (DP) resilient bipartite consensus protocol based on the Mean-Subsequence-Reduced (MSR) algorithm to defend against Byzantine agents. First, a resilient bipartite consensus controller incorporating Laplace noise is developed, which only works on competitive pairs of agents in the presence of potential eavesdroppers. Then, the convergence and privacy analyses demonstrate that the proposed algorithm can effectively preserve the privacy of initial states while simultaneously achieving resilient bipartite consensus. Furthermore, the privacy level is shown to be correlated with the minimum network degree. Finally, numerical simulations verify the effectiveness of the proposed results.

关键词： Privacy Sufficient conditions Noise Consensus control Numerical simulation Trajectory Consensus protocol

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Study of Current Distribution Characteristics of Automotive Fuel Cells with High-resolution Segmented Measurement Device

Study of Current Distribution Characteristics of Automotive ...

引用

Power and Energy Systems engineering (CPESE), International Conference on

作者： Chengyin Shi Junxiong Chen Yating Song Hao Tang School of Automation Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9798350377439

ISBN: (纸本)9798350377446

Proton exchange membrane fuel cell (PEMFC) has the advantages of low operating temperature, fast start-up, high power density, etc., which has a wide application prospect in the field of automotive power. The fuel cell performance can be analyzed under different current densities by using the zonal current collection detection technique. However, the existing method has low resolution and cannot accurately reflect the current distribution inside the automotive fuel cell stack. In this paper, a high-resolution segmented measurement device with 396 points is used to experimentally test the local current density distribution characteristics of a 406 cm 2 automotive fuel cell during a stepwise increase in load current, and the results are presented in three-dimensional data. The experimental results show that when the load current is 0.1 A/cm 2 , the current density at the hydrogen inlet is significantly higher than that at the oxygen inlet, with the highest current density of 0.154 A/cm 2 and the lowest of 0.0489 A/cm 2 ; when the load current is 0.6A/cm 2 , the current density at the oxygen inlet is higher than that at the hydrogen inlet, with the highest current density of 0.926 A/cm 2 and the lowest current density of 0.375 A/cm 2 with a difference of 0.551 A/cm 2 . The precise analysis of the current density distribution characteristics using the high-resolution segmented current collection measurement technique is of great importance in studying the control strategy of the fuel cell system and diagnosing the failure.

关键词： Protons Power system measurements Density measurement Hydrogen Fuel cells Current distribution Systems engineering and theory Current density Automotive engineering Cathodes

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Passivity-Based Design of Frequency Adaptive Selective Harmonic Repetitive Control for Grid-Connected Inverters

Passivity-Based Design of Frequency Adaptive Selective Harmo...

引用

International Conference on Power Electronics and Motion Control (IPEMC)

作者： Hongyu Pan Chuan Xie Jianxiao Zou School of Automation Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9798350351330

ISBN: (纸本)9798350351347

The repetitive controller (RC), owing to the capability of zero-error tracking periodical signals, is widely used to compensate for harmonics in the grid. Compared with Conventional RC, by eliminating specific order harmonics for different application scenarios, selective harmonic repetitive controller (SHRC) can simultaneously achieve high control accuracy and less computation burden. As SHRC is sensitive to frequency variations, it is improved to frequency adaptive SHRC (FA-SHRC) via adding filters to approximately compensate fractional-order delays caused by frequency variations. However, the external stability of FA-SHRC remains a problem. In the article, a detailed passivity-based designed approach of FA-SHRC is proposed. The proposed method can tune the impedance of the inverter with FA-SHRC passive for the full frequency range, which ensures the system is stable, dynamic, and adaptive regardless of grid impedance and frequency variations. Finally, experiments are performed to validate the superiority of the approach for designing FA-SHRC.

关键词： Adaptive systems Accuracy Power system stability Harmonic analysis Stability analysis Inverters Frequency measurement

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