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8th International Conference on Electrical, Mechanical and Computer engineering, ICEMCE 2024

作者： Yao, Yujia Zou, Yang Shi, Songhao Fang, Menghong Huang, Yu Fuzhou University School of Electrical Engineering and Automation Fuzhou China

ISBN: (纸本)9798331506230

Along with the rapid development of user-side distributed power generation technology, it has become an important development trend to improve the reliability and economy of community energy use through the configuration of energy storage, and how to build a joint interaction mechanism of energy storage and user-side resource energy sharing has become a key direction of energy storage layout in the user side. Under the background of energy interconnection, this paper proposes a cooperative optimization operation strategy based on masterslave game for photovoltaic community leasing energy storage. Firstly, the overall operation framework of PV community leasing energy storage is introduced, and the functions of each interest subject are analyzed. Then, an optimization model is built for community integrated energy operator (ICEO), energy storage operator (ESO), and community load aggregator, respectively. The game relationship among the subjects is analyzed, and a master-multiple-slave game model is constructed with ICEO as the master and ESO and community load aggregator as the slaves. The simulation results show that the proposed method is conducive to the promotion of new energy consumption, effectively takes into account the interests of multiple subjects, and then realizes the win-win cooperation between PV community and energy storage. © 2024 IEEE.

关键词： Energy storage

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A Bio-inspired Mutual-hook Strategy for the Soft Finger to Improve Load-bearing Capacity and Grasping Stability

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Journal of Bionic engineering 2024年第3期21卷 1290-1304页

作者： Jie Huang Lingjie Gai Xiaofeng Zong Yunquan Li School of Automation China University of GeosciencesWuhan430074China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex System Wuhan430074China The Shien-Ming Wu School of Intelligent Engineering South China University of TechnologyGuangzhou510641China

Soft grippers have great potential applications in daily life,since they can compliantly grasp soft and delicate ***,the highly elastic fingers of most soft grippers are prone to separate from each other while grasping objects due to their low stiffness,thus reducing the grasping stability and load-bearing *** tackle this problem,inspired from the venus flytrap plant,this work proposes a mutual-hook mechanism to restrain the separation and improve the grasping performance of soft *** novel soft gripper design consists of three modules,a soft finger-cot,two Soft Hook Actuators(SHAs)and two sliding ***,the soft finger-cot covers on the soft finger,increasing the contact area with the target object,two SHAs are fixed to the left and right sides of the finger-cot,and the sliding mechanisms are designed to make SHAs stretch *** demonstrate that the proposed design can restrain the separation of soft fingers substantially,and the soft fingers with the finger-cots can grasp objects three times heavier than the soft fingers without the proposed *** proposed design can provide invaluable insights for soft fingers to restrain the separation while grasping,thus improving the grasping stability and the load-bearing capacity.

关键词： Soft robotics Soft bionic finger-cot Soft hook actuator Grasping stability Load-bearing capacity

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Safety assessment of electromagnetic pulse radiation field of UHV transmission line 8

Safety assessment of electromagnetic pulse radiation field o...

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8th International Conference on Electrical, Mechanical and Computer engineering, ICEMCE 2024

作者： Yang, Tongyang Lanzhou Jiaotong University School of Automation and Electrical Engineering China

ISBN: (纸本)9798331506230

In this paper, the safety of the electromagnetic field generated by the pulse current in the human body during corona discharge of UHV AC transmission lines is evaluated. The time domain pulse waveform of positive and negative corona current is simulated by MATLAB, and the pulse current at 10 MHz is extracted by Fourier transform, which is used as the feed input dipole antenna to equivalently replace the electromagnetic field generated by corona discharge. The maximum electric field, the maximum magnetic field and the maximum electric field of the head obtained by simulation are less than the limits of the international standard ICNIRP. The results show that the human body is in a safe state in the corona discharge electromagnetic field. © 2024 IEEE.

关键词： Electromagnetic pulse

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Simulation analysis of helicopter rotor blade based on fluid-structure coupling 69

Simulation analysis of helicopter rotor blade based on fluid...

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69th International Conference on Vibroengineering

作者： Zhu, Kai Liu, Hongyue School of Mechatronic Engineering and Automation Shanghai University Shanghai China

Since the helicopters are required to fulfil many different attitudes during actual flight and are exposed to low amplitude and high number of cycles of vibration loads for a long period of time, the stresses on its rotor structure will be more complicated, which will lead to the rotor blades being subjected to larger stresses and causing fatigue damage. This paper proposes a combination of fluid-solid coupling and nCode fatigue simulation of helicopter rotor blade structure to study the stress distribution, danger point and fatigue life of rotor blades in hovering and forward flight state, so as to provide a reference basis for the judgement of helicopter rotor blade fatigue damage and the enhancement of safety performance. The results show that the maximum stress of the helicopter in the forward flight state is larger than that in the hovering state, and the maximum stress of the rotor blade in the forward flight state of the helicopter is located at the root of the blade as 166.89 MPa;and the fatigue life in the two states is obtained by the joint simulation method of Workbench-nCode, and the fatigue life in the forward flight state is reduced by 0.726 % compared with that in the hovering state. Therefore, the combined method of fluid-solid coupling and nCode fatigue simulation proposed in this paper can provide an effective research method for the design and optimisation process of helicopter rotor blades. © 2024 Kai Zhu, et al.

关键词： Fatigue damage

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On Designs of Decentralized Reputation Management for Permissioned Blockchain Networks

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Computer Modeling in engineering & Sciences 2024年第5期139卷 1755-1773页

作者： Jinyu Chen Long Shi Qisheng Huang Taotao Wang Daojing He School of Electronic and Optical Engineering Nanjing University of Science and TechnologyNanjing210094China School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen518055China College of Electronics and Information Engineering Shenzhen UniversityShenzhen518060China School of Computer Science and Technology Harbin Institute of TechnologyShenzhen518055China

In permissioned blockchain networks,the Proof of Authority(PoA)consensus,which uses the election of authorized nodes to validate transactions and blocks,has beenwidely advocated thanks to its high transaction throughput and fault ***,PoA suffers from the drawback of centralization dominated by a limited number of authorized nodes and the lack of anonymity due to the round-robin block proposal *** a result,traditional PoA is vulnerable to a single point of failure that compromises the security of the blockchain *** address these issues,we propose a novel decentralized reputation management mechanism for permissioned blockchain networks to enhance security,promote liveness,and mitigate centralization while retaining the same throughput as traditional *** paper aims to design an off-chain reputation evaluation and an on-chain reputation-aided ***,we evaluate the nodes’reputation in the context of the blockchain networks and make the reputation globally verifiable through smart ***,building upon traditional PoA,we propose a reputation-aided PoA(rPoA)consensus to enhance securitywithout sacrificing *** particular,rPoA can incentivize nodes to autonomously form committees based on reputation authority,which prevents block generation from being tracked through the randomness of reputation ***,we develop a reputation-aided fork-choice rule for rPoA to promote the network’s ***,experimental results show that the proposed rPoA achieves higher security performance while retaining transaction throughput compared to traditional PoA.

关键词： Blockchain reputation management PoA throughput security decentralization

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Flexible, Breathable and Sweatproof Piezoelectric Sensors Based on Additive Manufacturing 6

Flexible, Breathable and Sweatproof Piezoelectric Sensors Ba...

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6th International Conference on Electronic engineering and Informatics, EEI 2024

作者： Yang, Zhiqiang Guo, Zilong Lan, Weixia Liu, Yuanyuan School of Mechatronics Engineering and Automation Shanghai University Shanghai China

ISBN: (纸本)9798350353594

Flexible piezoelectric sensors have widespread applications in the field of wearable devices and human-machine interaction technologies. However, the manufacturing of these sensors mostly relies on manual assembly, lacking efficient manufacturing processes. In this paper, the 'one-step' fabrication of flexible piezoelectric sensors is achieved with a self-developed multi-component additive manufacturing composite system The sensor was designed with the electrospun PVDF functional layer, printed Ag electrode layer, and electrospun TPU encapsulation layer. The produced sensors exhibit a sensitivity of 0.04 V/N, a rapid response time of 25 ms, good breathability (600g/m2/day), and excellent sweat resistance. This method offers a promising approach for the efficient manufacturing of breathable and sweatproof flexible piezoelectric sensors. © 2024 IEEE.

关键词： Piezoelectric transducers

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Analysis of Vibration Characteristics of Gear Systems with Spatial Cracks 5

Analysis of Vibration Characteristics of Gear Systems with S...

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5th International Conference on Sensing, Measurement and Data Analytics in the Era of Artificial Intelligence, ICSMD 2024

作者： Li, Qiqing Liu, Xianzeng Cao, Zheng Wang, Hang Fan, Zhongding Liu, Yongbin School of Electrical Engineering and Automation Anhui University Hefei China

ISBN: (纸本)9798331529192

A spatially extended gear crack model was developed, where crack extension varies simultaneously in the directions of both end face and tooth height. An analytical model of spatial crack was constructed based on the energy method. Using the constructed model, two different crack extension paths were simulated to investigate its influence on the time-varying meshing stiffness of gear. Furthermore, a dynamic model of the gearbox was established to analyze the effect of crack extension path on the dynamic performance of the gear system. The results showed that with the extension of spatial crack, the time-varying meshing stiffness (TVMS) decreased, while the vibration impact value of the gear teeth increased accordingly. © 2024 IEEE.

关键词： Vibration analysis

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Resonance suppression of LCL grid-connected inverter based on dual MPC loops 4

Resonance suppression of LCL grid-connected inverter based o...

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4th IEEE International Conference on Power, Electronics and Computer Applications, ICPECA 2024

作者： Jin, Zhanxiang Zhang, Hui Yu, Tenghui School of Electrical Engineering and Automation Wuhan University Wuhan China

ISBN: (纸本)9798350359589

The large-scale integration of high-power grid-connected inverters poses significant challenges to the power system's electrical energy quality. Optimal Pulse Pattern with Unsymmetrical Switching angles (OPUS) modulation enables effective control of low-order harmonics at low switching frequencies but exhibits slow response and may generate a substantial amount of harmonics when operating under varying conditions. LCL filters can effectively eliminate high-order harmonics but are susceptible to resonance peak issues. This paper presents a dual MPC loop control strategy for LCL grid-connected inverters operating under asymmetric pulse optimization modulation. The inner loop optimally calculates the resonance damping magnetic linkage and superimposes the results onto the offline-calculated reference magnetic linkage. Subsequently, the magnetic flux correction is obtained by subtracting the actual virtual magnetic linkage from the reference magnetic linkage superimposed with the damping magnetic linkage. The outer MPC loop optimally allocates this flux correction to each phase, generating millisecond multiplication quantities by adjusting the phase angles, ensuring that the actual magnetic linkage follows the reference magnetic linkage with the added damping linkage. This approach effectively suppresses resonance peaks in LCL filters while satisfying high dynamic responsiveness. Finally, the transitional process and resonance suppression effects under varying operating conditions are analyzed and validated using Simulink simulation software. © 2024 IEEE.

关键词： LCL grid-connected inverter Model Predictive Control Optimal Pulse Pattern with Unsymmetrical Switching angles Resonance suppression Introduction

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A Variable Stiffness Joint with Electrostatic Giant Electrorheological Layer Jamming Based on AC Electric Field Control

A Variable Stiffness Joint with Electrostatic Giant Electror...

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2024 IEEE International Conference on Robotics and Biomimetics, ROBIO 2024

作者： Bai, Guoqing Zhang, Guotao Sun, Yi School of Mechatronic Engineering and Automation Shanghai University Shanghai China

ISBN: (纸本)9781665481090

A novel single-degree-of-freedom variable stiffness rotary joint is proposed, utilizing a variable damping force generated by the rotational shear of giant electrorheological fluid (GERF) under an alternating electric field to achieve stiffness adjustment. An electrostatic layer jamming stiffness model (ELJ-GERF) and a joint motion model based on GERF are developed and experimentally validated. The results demonstrate that the joint exhibits effective variable stiffness performance, confirming the validity of the design. © 2024 IEEE.

关键词： Electrorheological fluids

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BoT-PSPNet: bottleneck transformer enhanced PSPNet for fruit damage recognition and orchard monitoring

BoT-PSPNet: bottleneck transformer enhanced PSPNet for fruit...

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2024 International Conference on Optical and Photonic engineering, icOPEN 2024

作者： Ding, Xinming Luo, Lufeng Chen, Mingyou Luo, Shaoming School of Mechatronic Engineering and Automation Foshan University Guangdong528000 China

ISBN: (数字)9781510688117

ISBN: (纸本)9781510688100

Smart agriculture leverages information technology and IoT to achieve automation, intelligence, and precision in agricultural production. Harvesting robots, as crucial components, must accurately understand orchard environments and crop damage to optimize crop management and harvesting strategies, enabling efficient, low-loss, and large-scale operations. However, current semantic segmentation models often fail to meet the high-efficiency requirements in orchards, particularly in segmenting small-pixel targets, resulting in misidentification, missed detection, and segmentation distortion. To address these issues, we propose an improved segmentation network, BoT-PSPNet, for precise segmentation of orchard roads, trunks, fruits, and their damage. Specifically, we use PSPNet as the primary framework and integrate the Multi-Head Self-Attention (MHSA) module from Transformer into the ResNet50 Bottleneck. This approach overcomes PSPNet's limitations in handling long-range dependencies. The MHSA module provides robust global feature extraction capabilities and, through its self-attention mechanism, effectively captures long-range dependencies, addressing PSPNet's deficiencies in multi-scale information fusion, computational efficiency, and flexibility. We collected a dataset of 1,000 orchard images, including road conditions and various fruit damages, and conducted validation experiments. The results demonstrate that the proposed method outperforms traditional PSPNet models in segmentation accuracy, particularly in handling complex backgrounds and detailed features. This study provides a new methodological support for enhancing the visual perception accuracy of scenes and targets in agricultural environments. © 2025 SPIE.

关键词： Semantic Segmentation

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