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A Novel Three-DOF Transverse Flux Spherical Actuator With Decoupling Mechanism 26

A Novel Three-DOF Transverse Flux Spherical Actuator With De...

引用

26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Liu, Xiaoshuai Yan, Liang Xiang, Pengjie He, Xinghua Du, Nannan Wu, Chong Beihang University School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beijing China

ISBN: (纸本)9798350317589

This paper proposes a novel multi-DOF spherical actuator based on transverse flux and three-DOF decoupling mechanism. Firstly, the structure and working principle of the new multi-DOF spherical actuator are presented. Then, numerical simulations are performed to analyze its magnetic field and torque, resulting in the basic performance curve of the spherical motor. Finally, The structure of this spherical actuator is optimized by numerical simulation. The optimization results show that the performance of the optimized spherical actuator has been effectively improved in terms of torque ripple, output torque and control precision. © 2023 IEEE.

关键词： Spheres

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Feedforward control of flat hybrid automata: a behavioral systems theory approach 63

Feedforward control of flat hybrid automata: a behavioral sy...

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63rd IEEE Conference on Decision and control, CDC 2024

作者： Zahn, Frederik Kleinert, Tobias Hagenmeyer, Veit Karlsruhe Institute of Technology Institute for Automation and Applied Informatics Karlsruhe Germany Rwth Aachen University Chair of Process Control Engineering Aachen Germany

ISBN: (纸本)9798350316339

Differential flatness has been defined in the literature for continuous time dynamical systems and for discrete time systems. We define flatness of automata from the perspective of behavioral systems theory, and synthesize a flatness definition for hybrid automata. These new definitions allow for feedforward trajectory generation for flat hybrid automata. Additionally, we provide necessary and sufficient conditions of hybrid automaton flatness for different types of continuous state constraints and switching conditions, and how to compute whether a hybrid automaton is flat. We illustrate feedforward trajectory generation based on our findings for a robotic manipulator example. © 2024 IEEE.

关键词： Continuous time systems

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Research on a Permanent Magnet Trip Device for DC Miniature Circuit Breakers 7

Research on a Permanent Magnet Trip Device for DC Miniature ...

引用

7th International Conference on Electric Power Equipment - Switching Technology, ICEPE-ST 2024

作者： You, Yimin Pan, Yiwei Dai, Dongyun Wang, Lizhi School of Electrical Engineering and Automation Xiamen University of Technology Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control Xiamen China

ISBN: (纸本)9798350388947

The article investigates the structure of a permanent magnet tripping device used in non-polarized DC miniature circuit breakers, proposing a permanent magnet arrangement relative to the moving iron core as an alternative to the traditional built-in spring design. Dynamic and static characteristics of this permanent magnet tripping device were calculated using simulation software and compared with those of a traditional tripping device. The results indicate that when a short-circuit current occurs, the permanent magnet tripping device can execute tripping actions more accurately and rapidly compared to the traditional design, ensuring efficient and stable operation of the miniature circuit breaker. Subsequent transient tripping experiments conducted on circuit breakers equipped with both types of tripping devices validated the accuracy of these findings. © 2024 IEEE.

关键词： Permanent magnets

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Non-Overshooting Output Regulation of Linear Systems via Positive Systems Method 6

Non-Overshooting Output Regulation of Linear Systems via Pos...

引用

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

作者： Deng, Xuanjin Liu, Wei School of Automation Science and Engineering South China University of Technology Key Laboratory of Autonomous Systems and Networked Control of Ministry of Education Guangzhou China

ISBN: (纸本)9798350353594

This paper investigates the non-overshooting output regulation problem by using the analysis and synthesis approaches of positive systems. Combining linear programming with gain matrix decomposition technique, a state feedback control law with two different kinds of design parameters is designed to ensure the stability and positivity of the corresponding closed-loop systems, which leads to the solvability of the non-overshooting output regulation problem of linear systems. Finally, an example is given to verify the effectiveness of the proposed design. © 2024 IEEE.

关键词： State feedback

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Simulation and Optimization of Electrostatic Field in 40.5kV Inflatable Switchgear Cabinet 7

Simulation and Optimization of Electrostatic Field in 40.5kV...

引用

7th International Conference on Electric Power Equipment - Switching Technology, ICEPE-ST 2024

作者： You, Yimin Wang, Xiankun Dai, Dongyun Zhuo, Kaicai Wang, Xu School of Electrical Engineering and Automation Xiamen University of Technology Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control Xiamen China

ISBN: (纸本)9798350388947

The current rapid development of China's power transmission and transformation industry, inflatable switchgear has excellent environmental adaptability and small size, in the transmission and distribution network has been widely used. In order to further enhance the application range of inflatable cabinets, it is important to optimize the insulation performance of miniaturized switchgear. In this paper, electrostatic field simulation of 40.5kV inflatable switchgear based on the finite element method is carried out to judge the internal electric field distribution. Simulate and analyze the potential distribution and electric field strength distribution under the operating condition of the circuit breaker of the inflatable switchgear. The simulation results show that the electric field of sulfur hexafluoride in the outer shell of the inflatable switchgear is more concentrated near the poles, and the maximum value of the electric field reaches 78.2kV/mm, which exceeds the breakdown strength of the sulfur hexafluoride medium by 9kV/mm. Subsequently, the problem of excessive localized field strength is solved by studying the effects of conditions such as the length of the metal shielding ring and the radius of the metal crimp on the shielding effect. According to the simulation data, maintaining the volume and basic layout of the existing inflatable switchgear cabinet unchanged, after adding the optimized grounded metal shielding ring, the field strength at the pole and shell can be reduced to less than 9kV/mm, which meets the insulation requirements. The research results of this paper can provide theoretical guidance for the optimal design of the insulation of inflatable switchgear. © 2024 IEEE.

关键词： Sulfur hexafluoride

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A Multi-party Asymmetric Self-play Algorithm and Its Application in Multi-USV Adversarial Game Simulations 24

A Multi-party Asymmetric Self-play Algorithm and Its Applica...

引用

2024 International Conference on Machine Learning, Pattern Recognition and automation engineering, MLPRAE 2024

作者： Rao, Jinjun Wang, Cong Liu, Mei Lei, Jingtao Giernacki, Wojciech Department of Precision Mechanical Engineering School of Mechatronic Engineering and Automation Shanghai University China Institute of Robotics and Machine Intelligence Faculty of Automatic Control Robotics and Electrical Engineering Poznan University of Technology Poland

ISBN: (纸本)9798400709876

Aiming at the problem that the combination of self-play (SP) and deep reinforcement learning (DRL) only involves two-party games and the policy learning of each party is limited, a multi-party asymmetric self-play algorithm (MASP) is proposed. Firstly, by improving the ELO scoring system, the ELO scoring takes into account each party of the unmanned surface vehicle (USV) clusters, and the imbalance of the number of USV clusters, so that the frequency of exchanging strategies of all USV clusters in the confrontation process is equal. Secondly, it ensures that USV clusters have a balanced combat ability, and at the same time ensures that the combat ability of all parties is strong and weak and the gap is not too wide. In addition, the parameters are dynamically set to reduce the update frequency of the policy of the stronger party. The experimental results show that the MASP can make the USV clusters learn more effective policies, have a shorter game time, and obtain higher rewards and ELO scores in the simple 2v2 adversarial game scenario and the three-party game scenario of a warship escort mission. © 2024 ACM.

关键词： Deep reinforcement learning

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RELIABILITY PREDICTION OF POWER ELECTRONIC CONVERTERS BASED ON SURROGATE MODELS 14

RELIABILITY PREDICTION OF POWER ELECTRONIC CONVERTERS BASED ...

引用

14th International Conference on Quality, Reliability, Risk, Maintenance, and Safety engineering, QR2MSE 2024

作者： Gao, Junpeng Zhao, Zichuan Chen, Cen Ye, Xuerong Zhai, Guofu School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China AVIC Xi'an Flight Automatic Control Research Institute Xi'an China

ISBN: (纸本)9781837242672

Power electronic converters (PEC) are integral to various sectors, including power systems, transportation, and industrial production, where their reliability significantly influences overall system performance. Despite its importance, current research has not thoroughly addressed the simultaneous impact of component performance degradation and functional failures on electronic system performance. This paper introduces a reliability prediction method for PEC that considers both component performance degradation and functional failure. Initially, digital prototype models of PEC are developed to accurately represent the operational processes and simulate performance under each critical fault mode. To minimize simulation costs, two surrogate models based on neural networks are then established for PEC. Subsequently, through iterative calculations that utilize models of performance degradation and functional failures of components, an analysis of both PEC performance degradation and functional failure states is conducted, facilitating the completion of PEC reliability prediction. This proposed framework for reliability prediction may also be applicable to other electronic systems. © The Institution of engineering & Technology 2024.

关键词： Prediction models

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Structural Optimization of Shielding Cover For 24kV and 72.5kV Vacuum Interrupters 7

Structural Optimization of Shielding Cover For 24kV and 72.5...

引用

7th International Conference on Electric Power Equipment - Switching Technology, ICEPE-ST 2024

作者： Sang, Zhongqing Zhang, Yan You, Yimin Dai, Dongyun Tu, Yuanting Wang, Xu School of Electrical Engineering and Automation Xiamen University of Technology Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control Xiamen China

ISBN: (纸本)9798350388947

Vacuum interrupters are widely used in power transmission and distribution systems, vacuum interrupters factory test inspection, some products will appear insulation breakdown phenomenon, resulting in a decline in the overall yield rate. Therefore, this paper is aimed at improving the insulation performance of vacuum interrupter this problem to carry out in-depth research. This paper adopts the finite element analysis method to carry out electric field simulation calculations, through the establishment of a 3D model of the 24kV spiral groove contact vacuum interrupter chamber, insulation optimization of the internal structure of the vacuum interrupter chamber, it can be obtained that the vacuum interrupter chamber overall electric field strength with the reduction of the length of the main shielding cover, overall electric field strength decreases with decreasing angle of the main shield edge flap;72.5kV cup-shaped contact vacuum interrupter using finite element analysis method, change the length of the bellows shield cover for electric field strength simulation calculation. According to the simulation results, the electric field strength at the crest gradually decreases with increasing length of the bellows shield. It is concluded that the length of the main shielding cover of the vacuum interrupter, the angle of turning out of the edge of the main shielding cover, and the length of the bellows shield cover have an important influence on the insulation performance of the vacuum interrupter. © 2024 IEEE.

关键词： Bellows

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Research on Lightweighting of Secondary Cables Over Door in Instrumentation Room of Segmented Isolation Cabinet 7

Research on Lightweighting of Secondary Cables Over Door in ...

引用

7th International Conference on Electric Power Equipment - Switching Technology, ICEPE-ST 2024

作者： Zhao, Jing Wang, Xu Dai, Dongyun You, Yimin Cai, Ning Tu, Di School of Electrical Engineering and Automation Xiamen University of Technology Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control Xiamen China

ISBN: (纸本)9798350388947

In order to solve the problems such as cable not easy to bundle and difficulty to open and close the instrument room door caused by too much secondary cables passing through the instrument room of intelligent miniaturized switchgear cabinet, this paper takes the secondary wiring diagram of intelligent miniaturized longitudinal rotary/shift-open sectional isolation cabinet installed in 220kV substation of a certain place as an entry point, analyzes the signal categories, connection methods, signal flow direction among different types of intelligent electronic device (IED), sensors and other components with the terminal internal wiring mode of the instrumentation room. Under the condition of keeping the function of the wiring diagram unchanged and conforming to the wiring regulations, the optimized design of the secondary cable of the instrumentation room door line of the switchgear cabinet is completed by adjusting the space arrangement of the IED and terminals, optimizing the redundant junction, and integrating the design of parts and components by other technical means. After optimization, the total number of secondary cables in the instrument room of the sectional isolation cabinet is reduced from 181 to 97, and the overall optimization rate reaches 46%. This research result can provide reference for intelligent miniaturized switchgear cabinet secondary cable lightweight design. © 2024 IEEE.

关键词： Electric switchgear

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Simulation and optimization of inchworm-like pneumatic crawling actuator based on ABAQUS software 7

Simulation and optimization of inchworm-like pneumatic crawl...

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7th International Conference on Robotics, control and automation engineering, RCAE 2024

作者： Mu, Junqi Zong, Xiaofeng Wei, Yiyang Hou, Xuping China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education School of Automation Wuhan430074 China

ISBN: (纸本)9798350355642

The actuator, serving as the fundamental power source of a soft robot, functions as its central component. The field of soft robotics has garnered increasing research attention since its inception. Pneumatic crawling robots, being an essential branch within the realm of soft robotics, possess notable characteristics such as rapid response time, cost-effectiveness, and human-computer interaction safety. Consequently, they hold significant research value. Among various types of crawling robots that have garnered considerable interest from researchers is the inchworm crawling robot. This paper aims to address the design and development aspects pertaining to inchworm actuators. By utilizing ABAQUS simulation software and taking displacement as the reference parameter, an analysis was conducted to investigate the impact of various geometric parameters on actuator displacement. Additionally, optimization of these geometric parameters was performed. The values of aspect ratio, length-to-width ratio, vertex angle and gap depth suitable for inchworm-like actuator are obtained. These findings are presented for the first time in the field of crawling soft robots and provide a theoretical basis for the development of pneumatic inchworm-like actuators. © 2024 IEEE.

关键词： Aspect ratio

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