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2024 China Automation Congress, CAC 2024

作者： Peng, Rui Bai, Jiaxiang Zhu, Bin Cheng, Zhaoyang Zhang, Zhouburan Shanghai Aerospace Control Technology Institute Shanghai China Shanghai Key Laboratory of Aerospace Intelligent Control Technology Shanghai China Shanghai Xinyuelianhui Electronic Technology Co LTD Shanghai China

ISBN: (纸本)9798350368604

The spacecraft is powered by solar arrays. Solar arrays control problem for Inclined-orbit spacecraft, which has double degree freedom, is investigated in this paper. By analyzing the variation law of solar height angle, a double degree of freedom solar arrays control algorithm is designed, and the earth-oriented mode and attitude bias mode are studied respectively. Finally, by analyzing the data from the simulation test on the ground and the in-orbit test, it can be concluded that the proposed method is simple and feasible, and can ensure that the accuracy of solar panels orientation towards the sun remains within the allowable range for an extended period. In addition, the approach presented in this work can serve as a guide for the overall design of inclined orbit spacecraft aimed for an extended lifetime. © 2024 IEEE.

关键词： Orbits

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Dosimetry Research on the Interaction Between Electric Vehicle DC/DC Converter and Driver 1st

Dosimetry Research on the Interaction Between Electric Vehic...

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1st Electrical Artificial Intelligence Conference, EAIC 2024

作者： Song, Yanxia Lu, Mai Key Laboratory of Opto-Electronic Technology and Intelligent Control Ministry of Education Lanzhou Jiaotong University No. 88 Anning West Road Anning District Lanzhou730070 China

ISBN: (纸本)9789819640669

This work aims to present the dosimetry analysis of electromagnetic fields induced by a DC/DC converter installed in an electric vehicle (EV). This paper employs a finite element simulation software to construct an electromagnetic environment model of an adult male in the driver's seat of the EV when the DC/DC converter is in operation, and quantitatively analyze the magnetic flux density (B) and the induced electric field (E) of the driver and the head important tissues. The numerical calculation results are moreover compared with the electromagnetic exposure limits set by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines to assess the safety of the driver's electromagnetic exposure. The results show that the peaks B and E in the driver's whole body are 0.011 μT and 3.39 mV/m, accounting for 0.04% and 0.025% of the ICNIRP limits, respectively, and both appear at the driver's right foot areas. The cerebrospinal fluid tissue has the largest peak B value of 1.98 × 10−3 μT among the driver's head tissues. In the head's coronary, axial, and sagittal planes, the peak E is all 0.94 mV/m, emerging in slices nearest to the converter and gradually diminishing with distance. All the results remain within the safety margins set by the ICNIRP guidelines, signifying that the DC/DC converter poses no health risks to the driver. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Dosimetry

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Design and Performance Optimization of InGaAs/InAlAs Dopingless Tunnel Field-effect Transistor 2

Design and Performance Optimization of InGaAs/InAlAs Dopingl...

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2023 2nd International Conference on Semiconductors, Electromagnetics and Condensed Matter Physics, SECMP 2023

作者： Liu, Hu Zhou, Xiaoyu Li, Peifeng Zhang, Wenting School of Electronic and Information Engineering Lanzhou Jiaotong University Lanzhou730070 China Key Laboratory of Opto-technology and Intelligent Control Ministry of Education Lanzhou Jiaotong University Lanzhou730070 China

In this work, an InGaAs/InAlAs dopingless tunnel field-effect transistor is designed and systematically examined through numerical simulations. In line with the charge plasma concept, the proposed device can not only create a p-n-i-n structure without doping to enhance electron tunneling but also effectively overcome issues caused by doping such as random doping fluctuation, high thermal budget, etc. By investigating the effects of the HfO2 length (L H), the source-side channel length (L sc), and the source-drain electrodes structure on the proposed device, it concludes that the best device characteristic can be acquired when L H is located between 110 nm and 128 nm, L sc=4 nm, and double source-drain electrodes are adopted. © Published under licence by IOP Publishing Ltd.

关键词： Electron tunneling

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Image-Spectrum Collaborative Detecting System for Dynamic Target Detection 10

Image-Spectrum Collaborative Detecting System for Dynamic Ta...

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10th Symposium on Novel optoelectronic Detection technology and Applications

作者： Gu, Luo Hou, Linbao Lin, Yue Wang, Xiang Yang, Qiujie He, Zhiping Key Laboratory of Space Active Opto-electronic Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China Shanghai Aerospace Control Technology Institute Shanghai201109 China

ISBN: (数字)9781510688155

ISBN: (纸本)9781510688148

Remote detection and identification of small targets has been the significant issue in areas of industry and business. For example, a number of drone invasion affairs happen around the civil airports in recent years, which seriously affect the international shipping and do great damage to international economy even passengers' lives. Detection of the dynamic small target poses a great challenge to detecting equipment. Traditional small target detecting technologies are based on optical imaging, depending on the morphological characteristics of target's image across the focal plane. In other words, traditional detecting and imaging methods work only in the case where the image of small target occupies enough pixels. In the case of dynamic and small target detection, the morphological characteristics of target's image largely degenerate and current technologies are difficult to work well. In this paper, an optical system of image-spectrum collaborative detecting is presented. With ingeniously designed redirection optics integrated, the proposed system allows for the easy detection and identification of the dynamic and small targets. Operating principle of image-spectrum collaborative detecting is elaborated. An imaging channel with field of view no less than 2°is designed at first, and then a spectrum measuring channel is designed and combined with the imaging channel. The imaging channel takes the role in detecting target, and the direction information from the imaging channel is transferred to the spectrum measuring channel. Under the guidance of azimuth and elevation, the system can identify the dynamic and small target by accurately measuring the characteristic spectrum which is referred to as the object's fingerprint. With more sophisticated optical design, a detecting system with large field of view can be obtained. The presented system in this paper shows a great potential in solving the problem of detecting and identifying the dynamic and small targets. © 2025

关键词： Optical design

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Learning-Based Predictive control of Switched Nonlinear Systems via Koopman Modeling Approach

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Journal of Systems Science & Complexity 2025年第2期38卷 691-716页

作者： NING Zepeng FANG Xu LI Yibei XIE Lihua School of Electrical and Electronic Engineering Nanyang Technological University Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian University of Technology Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences

This paper proposes a data-driven learning-based approach to predictive control for switched nonlinear systems subject to state and control constraints and external stochastic disturbances. A switched Koopman modeling framework is developed, where a multi-mode neural network for state lifting is trained simultaneously with Koopman operators and state reconstruction matrices for all *** framework facilitates the construction of the switched linear Koopman model in a transformed space and effectively captures the dynamics of the original nonlinear system. A switched predictive control strategy is then designed to regulate the switched Koopman model with constrained states and control inputs against both the stochastic disturbances and the uncertainties introduced by the lifting neural network. The proposed control scheme ensures mean-square stability and guarantees boundedness during the online phase. Furthermore, boundedness analysis is performed to determine the bounded set of the original system state across all admissible switching sequences. The effectiveness of the proposed methodology is demonstrated through a case study of a gene regulatory network.

关键词： Data-driven machine learning model predictive control stochastic systems switched Koopman model switched nonlinear systems

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Phishing detection on Ethereum via transaction subgraphs embedding

IET Blockchain

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IET Blockchain 2023年第4期3卷 194-203页

作者： Lv, Haifeng Ding, Yong Guangxi Key Laboratory of Machine Vision and Intelligent Control WuZhou University Wuzhou China Guangxi Key Laboratory of Cryptography and Information Security School of Computer Science and Information Security Guilin University of Electronic Technology Guilin China Guangxi Colleges and Universities Key Laboratory of Industry Software Technology WuZhou University Wuzhou China

With the rapid development of blockchain technology in the financial sector, the security of blockchain is being put to the test due to an increase in phishing fraud. Therefore, it is essential to study more effective measures and better solutions. Graph models have been proven to provide abundant information for downstream assignments. In this study, a graph-based embedding classification method is proposed for phishing detection on Ethereum by modeling its transaction records using subgraphs. Initially, the transaction data of normal addresses and an equal number of confirmed phishing addresses are collected through web crawling. Multiple subgraphs using the collected transaction records are constructed, with each subgraph containing a target address and its nearby transaction network. To extract features of the addresses, a modified Graph2Vec model called imgraph2vec is designed, which considers block height, timestamp, and amount of transactions. Finally, the Extreme Gradient Boosting (XGBoost) algorithm is employed to detect phishing and normal addresses. The experimental results show that the proposed method achieves good performance in phishing detection, indicating the effectiveness of imgraph2vec in feature acquisition of transaction networks compared to existing models. © 2023 The Authors. IET Blockchain published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and technology.

关键词： Graphic methods

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Research on the Characteristics of Multi-Outlet Internal Rotary Nozzle 14th

Research on the Characteristics of Multi-Outlet Internal Rot...

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14th International Workshop of Advanced Manufacturing and Automation, IWAMA 2024

作者： Jiang, Wenbo Xu, Weipeng College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao266590 China State Key Laboratory of Intelligent Coal Mining and Strata Control Shanghai China

ISBN: (纸本)9789819626243

This paper proposes a multi-outlet internal rotating nozzle structure to address the issues of soot generation and friction/wear associated with mineral mining. The atomization and jet characteristics of the nozzle are simulated and analysed using CFD software, and the effects of initial pressure and outlet diameter on the jet effect of the internal rotating nozzle are investigated. The findings indicate that the jet velocity in the lateral exit channel and the canter exit of the multi-outlet nozzle increases with an increase in the initial pressure. Conversely, the exit flow velocity of the nozzle at a constant initial pressure shows a gradual decrease with an increase in the exit diameter. At low pressure and outlet diameter, the atomization effect of the nozzle is not significant. However, the atomization angle increases gradually with an increase in the initial pressure and outlet diameter. Under the same pressure, the atomization angle shows a tendency of increasing and then decreasing with the increase of outlet diameter. And the best atomization angle is obtained when the outlet diameter is 1.3 mm and the initial pressure is 0.7 MPa. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Nozzles

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Dynamic Target Enclosing control Scheme for Multi-Agent Systems via a Signed Graph-Based Approach

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IEEE/CAA Journal of Automatica Sinica 2023年第2期10卷 560-562页

作者： Weihao Li Kaiyu Qin Mengji Shi Jingliang Shao Boxian Lin the School of Aeronautics and Astronautics University of Electronic Science and Technology of ChinaChengdu 611731 the Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu 611731China the School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

Dear Editor,This letter investigates the target enclosing control problem of multi-agent systems.A signed graph-based control strategy is presented,where the agents are steered to enclose the dynamic target from both sides as they *** is inspired by the phenomenon that signed networks exhibit bipartite clustering if the underlying graph is structurally balanced,so that the agents may naturally enclose the zero point from opposite sides(+and.)if proper controllers are *** adopting a distributed observer to estimate the information of dynamic target。

关键词： networks agent Dynamic

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Force Analysis and Reliability Improvement Method for the Conical Picks of the Coal Mining Machine Drum 14th

Force Analysis and Reliability Improvement Method for the Co...

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14th International Workshop of Advanced Manufacturing and Automation, IWAMA 2024

作者： Wang, Shuxue Xu, Weipeng College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao266590 China State Key Laboratory of Intelligent Coal Mining and Strata Control Shanghai China

ISBN: (纸本)9789819626243

In response to the situation where the first blade pick of a coal mining machine is prone to failure when cutting hard coal, the working process of the drum was simulated using finite element method. The force on the pick at different positions was obtained, and the main reasons for the failure of the first blade pick were analyzed. The effectiveness and practicality of reducing the force on the first blade pick were proposed and simulated. The research results indicate that the force on the first blade tooth can be effectively reduced by increasing the diameter of the end disk. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Coal mines

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Research on Meshing Characteristics and Vibration of Aluminum Miner Based on MASTA 14th

Research on Meshing Characteristics and Vibration of Aluminu...

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14th International Workshop of Advanced Manufacturing and Automation, IWAMA 2024

作者： Dong, Guanzhan Xu, Weipeng Gao, Kuidong College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao266590 China State Key Laboratory of Intelligent Coal Mining and Strata Control Shanghai China

ISBN: (纸本)9789819626243

Aiming at the mechanical continuous operation of bauxite mining process, firstly, an improved scheme of cutting bauxite with an 8-pole motor shearer is proposed, which is practical and feasible, and a 3D model is established in Solid Edge. Secondly, considering the higher meshing frequency of high-speed gear in the cutting part, the meshing characteristics under different loads were investigated by MASTA software, and the laws of contact stress, meshing dislocation and trans-mission error were obtained. Finally, the vibration displacement of one axis is obtained in view of the significant influence of individual order energy on the vibration of the shell under rated working conditions. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Bauxite deposits

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