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2024 CSAA/IET International Conference on Aircraft Utility Systems, AUS 2024

作者： Wang, Jingsong Li, Chentao Wang, Xutian Xu, Ping Ma, Qishaung School of Automation Science and Electrical Engineering Beihang University Beijing China Navigation Guidance and Control Institute of NORINCO Group Beijing100089 China

With the extensive use of wide bandgap represented by silicon carbide (SiC) and gallium nitride (GaN) semiconductor devices, The power density of power electronic converters has been enhanced, driving towards miniaturization and integration, which has led to a more intricate electromagnetic environment within power converters, and the accompanying electromagnetic interference (EMI) problem has become more prominent. Generally, the voltage and current mutation caused by the rapid switching action of power semiconductor devices is regarded as the primary source of EMI in power converters. To mitigate the conducted EMI from power converters, this study employed an infinitely differentiable "S"-shaped Gaussian function and chaotic pulse width modulation (CPWM) signals for convolution, yielding an optimized chaotic gaussian pulse width modulation (CGPWM) signal that served as a reference waveform to shape the switching voltage waveform of the power metal-oxide-semiconductor field-effect transistors (MOSFETs). Experimental results demonstrate the efficacy of this driving waveform in suppressing EMI generated by power converters. © The Institution of engineering & Technology 2024.

关键词： Gallium nitride

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3C Assembly Methods and Systems Based on Large Language Models

3C Assembly Methods and Systems Based on Large Language Mode...

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2024 IEEE International Conference on Robotics and Biomimetics, ROBIO 2024

作者： Xin, Dejun Jin, Ligang Mao, Donghui Li, Fengming Wang, Chaoqun Song, Rui Li, Yibin School of Information and Electrical Engineering Shandong Jianzhu University Jinan China School of Control Science and Engineering Shandong University Jinan China Shandong Research Institute of Industrial Technology Jinan China

ISBN: (纸本)9781665481090

Addressing issues such as low efficiency in semi-automated production changes, difficulty in guaranteeing product quality, and heavy reliance on manpower in the current 3C assembly industry, this paper proposes a new intelligent assembly planning method for 3C assembly manipulations. It focuses on decomposing tasks and generating operation sequences using Large Language Models (LLMs) and the Planning Domain Definition Language (PDDL). The introduction of a hierarchical clustering-based sample selection and prompt generation algorithm (HCSSPG) enhances the problem-solving capabilities of LLMs, facilitating intelligent assembly operations. Furthermore, the study investigates flexible assembly state monitoring methods for robots, which enable anomaly detection during the assembly process and the intelligent selection and execution of solutions based on these anomalies. A real mobile phone assembly platform has been developed to validate the planning and execution phases of the assembly process, thus providing essential theories and technical support for industrial applications. © 2024 IEEE.

关键词： Hierarchical clustering

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A Full-ANN control Method of Three-Phase Grid-Connected Inverter

A Full-ANN Control Method of Three-Phase Grid-Connected Inve...

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2024 CPSS and IEEE International Symposium on Energy Storage and Conversion, CPSS and ISESC 2024

作者： Nie, Kaizhe Gao, Feng Wang, Hanzhi Xu, Tao School of Control Science and Engineering Shandong University Jinan China Shandong University Electric Power Technology Co. Ltd Jinan China

ISBN: (纸本)9798350380514

To break free from the confines of the d-q control framework and traditional control techniques, such as phase-locked loop, as well as proportional-integral/proportional-resonant controllers, this paper proposes a three-phase inverter grid-connected control method based on a full-artificial neural network (FANN-TPIGCC), which leverages the nonlinear approximation capabilities of artificial neural networks to directly obtain the modulation wave required for inverter control. First, the inverter circuit principle is analyzed and two sets of auxiliary variables are chosen. Subsequently, the first and second sets of auxiliary variables are separately input into two echo state networks based on the least square algorithm. These networks respectively output the reference modulation wave and the amplitude ratio along with the phase difference. Finally, utilizing the amplitude ratio and phase difference, a modulation transformation method is devised to fine-tune both amplitude and phase of the reference modulation wave, resulting in the ultimate modulation wave utilized for inverter grid-tied control. Simulink simulation results show that the FANN-TPIGCC method can achieve flexible switching between different reference current under both strong and weak grid conditions. It exhibits lower total harmonic distortion and ideal steady-state performance, meeting the control requirements of three-phase inverters. © 2024 IEEE.

关键词： Phase locked loops

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A Cyclic Small Phase Theorem for Nonlinear Systems 63

A Cyclic Small Phase Theorem for Nonlinear Systems

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63rd IEEE Conference on Decision and control, CDC 2024

作者： Chen, Chao Chen, Jianqi Zhao, Di Qiu, Li Leuven3001 Belgium Nanjing University Center for Advanced Control and Smart Operations Suzhou215163 China Tongji University Dept. of Control Science and Engineering Shanghai Institute of Intelligent Science and Technology Shanghai200092 China The Chinese University of Hong Kong Shenzhen School of Science and Engineering Shenzhen518172 China

ISBN: (纸本)9798350316339

A new definition of phase, called the γ-segmental phase, is proposed for stable nonlinear systems from an input-output perspective. The definition is graphically established upon a disk segment covering the normalized numerical range of a nonlinear system plotted in the unit disk. The Hilbert transform is employed which acts as an enabling instrument for complexifying real-valued input-output trajectories of a system. A small phase stability criterion is developed for a cyclic feedback system consisting of multiple subsystems, namely, beginequation Ψγ1(P1)+Ψγ2(P2)+ċs+Ψγm(Pm) set(-π, π)endequation where the interval-valued Ψγ(ċ) denotes the γ-segmental phase of a system. The proposed criterion can be regarded as a phase counterpart to the monumental small gain theorem. © 2024 IEEE.

关键词： Stability criteria

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African Bison Optimization Algorithm:A New Bio-Inspired Optimizer with engineering Applications

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Computers, Materials & Continua 2024年第10期81卷 603-623页

作者： Jian Zhao Kang Wang Jiacun Wang Xiwang Guo Liang Qi School of Science University of Science and Technology LiaoningAnshan114051China Team of Artificial Intelligence Theory and Application University of Science and Technology LiaoningAnshan114051China Department of Computer Science and Software Engineering Monmouth UniversityWest Long BranchNJ 07764USA Information and Control Engineering College Liaoning Petrochemical UniversityFushun113000China Department of Computer Science and Technology Shandong University of Science and TechnologyQingdao266590China

This paper introduces the African Bison Optimization(ABO)algorithm,which is based on biological *** is inspired by the survival behaviors of the African bison,including foraging,bathing,jousting,mating,and *** foraging behavior prompts the bison to seek a richer food source for *** bison find a food source,they stick around for a while by bathing *** jousting behavior makes bison stand out in the population,then the winner gets the chance to produce offspring in the mating *** eliminating behavior causes the old or injured bison to be weeded out from the herd,thus maintaining the excellent *** above behaviors are translated into ABO by mathematical *** assess the reliability and performance of ABO,it is evaluated on a diverse set of 23 benchmark functions and applied to solve five practical engineering problems with *** findings from the simulation demonstrate that ABO exhibits superior and more competitive performance by effectively managing the trade-off between exploration and exploitation when compared with the other nine popular metaheuristics algorithms.

关键词： Optimization metaheuristics African bison optimization engineering problems

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Friction of graphene on a substrate with a cavity defect

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science China(Technological sciences) 2024年第9期67卷 2834-2841页

作者： ZHOU Peng HUO ZhanLei CHANG TienChong Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai Frontier Science Center of MechanoinformaticsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China The Center for Computational Mechanics and Engineering Applications Provincial Mechanics Experimental Teaching Demonstration CenterSchool of Civil EngineeringHebei University of EngineeringHandan 056038China Shanghai Institute of Aircraft Mechanics and Control Tongji UniversityShanghai 200092China Joint-Research Center for Computational Materials Zhejiang LaboratoryHangzhou 311100China

The frictional behavior of supported graphene is known to be influenced by the physical properties and surface morphologies of the underlying substrate. However, it is unclear how a surface defect on the substrate affects the friction of supported graphene,and it is even unknown how to define the defect-induced friction force in this context. Here we conduct molecular dynamics(MD) simulations to investigate the friction between a square diamond slider and a graphene sheet supported by a copper substrate with a surface cavity defect. Our results demonstrate that the defect-induced friction exhibits a nonlinear increase with cavity size, while it decreases nonlinearly with slider size. We propose that the definition of defect-induced friction can be linked to the increase in friction work over the length of the slider, and is closely correlated to the defect-induced relative change in indentation depth and the ratio of the cavity area to the contact area. These findings provide a comprehensive evaluation of the impact of a substrate cavity defect on the friction of supported graphene and offer insights that may have broader implications for understanding defect-induced friction in other two-dimensional materials.

关键词： friction graphene underneath substrate cavity defect

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control Strategy for Small DC-Link Capacitor Brushless DC Motor Drives Using a Single DC-Link Current Sensor 27

Control Strategy for Small DC-Link Capacitor Brushless DC Mo...

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27th International Conference on Electrical Machines and Systems, ICEMS 2024

作者： Gao, Hang Li, Xinmin Gu, Xin Chen, Wei Xia, Changliang School of Control Science and Engineering Tiangong University Tianjin China School of Electrical Engineering Tiangong University Tianjin China Zhejiang University Advanced Electrical Equipment Innovation Center Hangzhou China

ISBN: (纸本)9784886864406

While employing a single current sensor in a brushless dc motor (BLDCM) drive system can significantly reduce costs, it can also introduce the measurement dead-zone problem. To address this problem, this paper analyzes the relationship between DC-link current and phase current under various voltage vectors in Zone II. This paper employs a single DC-link current sensor (SDCS) to sample the DC-link current and reconstruct the phase currents, with the sampling method being free of measurement dead-zone across the entire speed range. For a BLDCM system, whose DC-link consists of a small capacitor and an insulated gate bipolar transistor (IGBT), this paper proposes a SDCS control strategy. The phase current and the actual speed of the motor are used to determine zone division, ensuring the BLDCM system with small capacitance operates reliably. Experimental results demonstrate the effectiveness of the proposed approach. © 2024 The Institute of Electrical Engineers of Japan.

关键词： Insulated gate bipolar transistors (IGBT)

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Optimal Configuration of Multitype Energy Storage for Integrated Energy Systems Considering System Reserve Value

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CSEE Journal of Power and Energy Systems 2024年第5期10卷 2114-2126页

作者： Xun Dou Jun Wang Zhenyuan Zhang Min Gao College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing 211816China Research Institute of NARI Technology Co. Ltd.Nanjing 211106China School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Falcon Computing Solutions 10880 Wilshire Blvd Suite 1132Los AngelesCA 90024USA

An integrated energy system(IES)contributes to improving energy efficiency and promoting sustainable energy *** different dynamic characteristics of the system,such as demand/response schemes and complex coupling characteristics among energy sources,siting and sizing of multitype energy storage(MES)are very important for the economic operation of the *** the effect of the diversity of the IES on system reserve based on electricity,gas and heat systems in different scenarios,a two-stage MES optimal configuration model,considering the system reserve value,is *** the first stage,to determine the location and charging/discharging strategies,a location choice model that minimizes the operating cost,considering the system reserve value,is *** the second stage,a capacity choice model,to minimize the investment and maintenance cost of the MES,is ***,an example is provided to verify the effectiveness of the MES configuration method in this paper in handling operational diversity and ensuring system *** with the configuration method that disregards the system reserve value,the results show that the MES configuration method proposed in this paper can reduce the annual investment cost and operating cost and improve the system reserve value.

关键词： Integrated energy system multitype energy storage optimal configuration renewable source system reserve value

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Energy Efficiency Maximization for Hybrid Access Femtocell Networks via Incentive Mechanism and Power control Strategy 13

Energy Efficiency Maximization for Hybrid Access Femtocell N...

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13th IEEE International Conference on CYBER Technology in Automation, control, and Intelligent Systems, CYBER 2023

作者： Liu, Xuelin Wang, Weimin Liu, Zhixin School of Control Science and Engineering Dalian University of Technology Dalian116023 China School of Electrical Engineering Yanshan University Qinhuangdao066004 China Key Lab of Industrial Computer Control Engineering of Hebei Province Hebei Province Qinhuangdao066004 China

ISBN: (纸本)9798350315196

Femtocell network has a great development space in increasing coverage and capacity of wireless network. In order to meet the quality of service (QoS) requirements of MUEs in MBS coverage, we propose a seed channel incentive mechanism in the two-tier femtocell network, where the MBS provides sub-channels to FBSs to motivate them to serve for the MUEs within the MBS coverage. To maximize the energy efficiency of femtocell layer after hybrid access, the optimization problem is modeled. The combined method of worst-case, Dinkelbach and continuous convex approximation is developed to make the optimization problem solvable. In addition, in order to realize the practical application of the proposed scheme, an optimization algorithm combining sub-channel and power allocation is developed. The numerical results show that the proposed algorithm is effective in improving the energy efficiency of the femtocell layer. © 2023 IEEE.

关键词： Femtocell

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Higher-order properties and extensions for indirect MRAC and APPC of linear systems

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science China(Information sciences) 2024年第4期67卷 218-238页

作者： Yanjun ZHANG Zhipeng ZHANG Jian SUN Lei WANG Kangkang ZHANG National Key Lab of Autonomous Intelligent Unmanned Systems Beijing Institute of Technology School of Automation Beijing Institute of Technology Beijing Institute of Technology Chongqing Innovation Center College of Control Science and Engineering Zhejiang University Department of Electrical and Electronic Engineering Imperial College London KIOS Research and Innovation Center of Excellence University of Cyprus

Recently, a reference derived some new higher-order output tracking properties for direct model reference adaptive control（MRAC） of linear time-invariant（LTI） systems: limt→∞ e（i）（t） = 0, i = 1,..., n*-1, where n*and e（i）（t） denote the relative degree of the system and the i-th derivative of the output tracking error, respectively. However, a naturally arising question involves whether indirect adaptive control（including indirect MRAC and indirect adaptive pole placement control） of LTI systems still has higher-order tracking properties. Such properties have not been reported in the literature. Therefore, this paper provides an affirmative answer to this question. Such higher-order tracking properties are new discoveries since they hold without any additional design conditions and, in particular, without the persistent excitation condition. Given the higher-order properties, a new adaptive control system is developed with stronger tracking features.（1） It can track a reference signal with any order derivatives being unknown.（2） It has higher-order exponential or practical output tracking properties.（3） Finally, it is different from the usual MRAC system, whose reference signal's derivatives up to the n*order are assumed to be known. Finally, two simulation examples are provided to verify the theoretical results obtained in this paper.

关键词： higher-order tracking indirect adaptive control model reference adaptive control adaptive pole placement control

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