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International Conference on advanced systems and Electric Technologies (IC_ASET)

作者： Fatma Zohra Latrech Asma Ben Rhouma Adel Khedher LATIS-Laboratory of Advanced Technology and Intelligent Systems Université de Sousse Ecole Nationale d'Ingénieurs de Sousse Sousse Tunisie

This paper presents the direct torque control (DTC) of a dual star induction machine (DSIM) employing a sliding mode speed controller. The comparison process is achieved by comparing the efficiency of two types of speed controllers: the proportional integral (PI) controller and the sliding mode (SM) controller. Simulation tests were conducted in the MATLAB/Simulink environment and the obtained results demonstrate the superiority of the SM speed controller in terms of robustness to torque and speed variations, as well as the rapidity of the DSIM operation.

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Magnetic Microrobots Fabricated by Photopolymerization and Assembly

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Cyborg and Bionic systems 2023年第1期4卷 41-46页

作者： Xiyue Liang Yue Zhao Dan Liu Yan Deng Tatsuo Arai Masaru Kojima Xiaoming Liu Key Laboratory of Biomimetic Robots and Systems Ministry of EducationState Key Laboratory of Intelligent Control and Decision of Complex SystemBeijing Advanced Innovation Center for Intelligent Robots and Systemsand School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China Center for Neuroscience and Biomedical Engineering The University of Electro-CommunicationsTokyo 182-8585Japan Department of Materials Engineering Science Osaka UniversityOsaka 560-8531Japan

Magnetic soft microrobots have great potential to access narrow spaces and conduct multiple tasks in the biomedical *** now,drug delivery,microsurgery,disease diagnosis,and dredging the blocked blood vessel have been realized by magnetic soft microrobots in vivo or in ***,as the tasks become more and more complex,more functional units have been embedded in the body of the developed magnetic *** magnetic soft microrobots with complex designed geometries,mechanisms,and magnetic orientation are now greatly challenging the fabrication of the magnetic *** this paper,we propose a new method combining photopolymerization and assembly for the fabrication of magnetic soft *** the micro-hand assembly system,magnetic modules with different shapes and materials are firstly arrayed with precise position and orientation ***,the developed photopolymerization system is employed to fix and link these modules with soft *** on the proposed fabrication method,3 kinds of soft magnetic microrobots were fabricated,and the fundamental locomotion was *** believe that the presented fabrication strategy could help accelerate the clinical application of magnetic microrobots.

关键词： Magnetic system precise

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A bionic approach for the mechanical and electrical decoupling of an MEMS capacitive sensor in ultralow force measurement

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Frontiers of Mechanical Engineering 2023年第2期18卷 297-317页

作者： Wendi GAO Bian TIAN Cunlang LIU Yingbiao MI Chen JIA Libo ZHAO Tao LIU Nan ZHU Ping YANG Qijing LIN Zhuangde JIANG Dong SUN State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesOverseas Expertise Introduction Center for Micro/Nano Manufacturing and Nano Measurement Technologies Discipline InnovationXi’an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and SystemSchool of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 265599China State Key Laboratory of Robotics and Systems(HIT) Harbin 150006China Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of TechnologyBeijing 100081China Department of Biomedical Engineering City University of Hong KongHong KongChina

Capacitive sensors are efficient tools for biophysical force measurement,which is essential for the exploration of cellular ***,attention has been rarely given on the influences of external mechanical and internal electrical interferences on capacitive *** this work,a bionic swallow structure design norm was developed for mechanical decoupling,and the influences of structural parameters on mechanical behavior were fully analyzed and optimized.A bionic feather comb distribution strategy and a portable readout circuit were proposed for eliminating electrostatic *** instability was evaluated,and electrostatic decoupling performance was verified on the basis of a novel measurement method utilizing four complementary comb arrays and applicationspecific integrated circuit *** electrostatic pulling experiment showed that the bionic swallow structure hardly moved by 0.770 nm,and the measurement error was less than 0.009% for the area-variant sensor and 1.118% for the gap-variant sensor,which can be easily compensated in *** proposed sensor also exhibited high resistance against electrostatic rotation,and the resulting measurement error dropped below 0.751%.The rotation interferences were less than 0.330 nm and(1.829×10^(-7))°,which were 35 times smaller than those of the traditional differential *** on the proposed bionic decoupling method,the fabricated sensor exhibited overwhelming capacitive sensitivity values of 7.078 and 1.473 pF/μm for gap-variant and area-variant devices,respectively,which were the highest among the current *** immunity to mechanical disturbances was maintained simultaneously,i.e.,less than 0.369% and 0.058% of the sensor outputs for the gap-variant and area-variant devices,respectively,indicating its great performance improvements over existing devices and feasibility in ultralow biomedical force measurement.

关键词： micro-electro-mechanical system capacitive sensor bionics operation instability mechanical and electrical decoupling biomedical force measurement

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Multifunctional diamond-based catalysts:Promising candidates for energy conversions in extreme environments-A mini-review

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Electron 2024年第3期2卷 70-84页

作者： Ziwei Zhao Xiaowu Gao Hansong Zhang Keran Jiao Pengfei Song Yumin Zhang Yongjie Wang Jiaqi Zhu Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive ApplicationHarbin Institute of TechnologyShenzhenChina National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbinChina Department of Chemical Engineering The University of ManchesterManchesterUK School of Advanced Technology Xi'an Jiaotong-Liverpool UniversitySuzhouChina Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhouChina

In order to properly utilize the abundant CO_(2)and water resources,various catalytic materials have been developed to convert them into valuable chemicals as renewable fuels electrochemically or ***,most studies are conducted under mild laboratory conditions,but for some extreme environments,such as Mars and space stations,there is an urgent need to develop new catalysts satisfying such special *** catalytic materials mainly focus on metals and narrow bandgap semiconductor materials,while the research on wide and ultrawide bandgap materials that can inherently withstand extreme conditions has not received enough *** the robust stability and excellent physico-chemical properties of diamond,it can be expected to perform in harsh environments for electrocatalysis or photocatalysis that has not been investigated ***,this review summarizes the catalytic functionality of diamond-based electrodes with various but tunable product selectivity to obtain the varied C_(1)or C_(2+)products,and discusses some important factors playing a key role in manipulating the catalytic ***,the unique solvation electron effect of diamond gives it a significant advantage in photocatalytic conversions which is also summarized in this *** the end,prospects are made for the application of diamond-based catalysts under various extreme *** challenges that may be faced in practical applications are also summarized and future breakthrough directions are proposed at the end.

关键词： CO_(2)catalytic reduction diamond extreme environment functionality renewable energy

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Performance Investigation of Three-Stage Modular Smart Transformer with Sliding Mode Control

Performance Investigation of Three-Stage Modular Smart Trans...

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International Conference on advanced systems and Electric Technologies (IC_ASET)

作者： Hiba Helali Adel Khedher Ecole Nationale d'Ingénieurs de Sousse LATIS- Laboratory of Advanced Technology and Intelligent Systems Université de Sousse Sousse Tunisie

The Smart Transformer (ST) is an intelligent power transmission device between AC and DC grids, which facilitates the integration of renewable energy resources, electric vehicle charging stations, and energy storage batteries into the distribution grid. This paper proposes a three-stage smart transformer model comprising a Cascaded H-Bridge (CHB) rectifier for the input stage, three dual active bridge converters for the isolation stage, and a four-leg inverter for the output stage. In order to improve the dynamic performance of this model, the sliding mode control has been applied to its input and output stages, and the soft switching control has been used in the isolation stage. To investigate the performance of the ST control strategy, a series of simulations were performed under disturbances, namely, voltage drop, voltage swell, harmonics distortion, and flickers in the MATLAB environment. The obtained results confirm the robustness of the ST controller against these disturbances.

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Implementation of MPPT Algorithms to a Developed Photovoltaic Emulator: Study and Comparative Analysis

Implementation of MPPT Algorithms to a Developed Photovoltai...

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International Conference on systems and Control (ICSC)

作者： Zouhaira Ben Mahmoud Intissar Moussa Adel Khedher LATIS-Laboratory of Advanced Technology and Intelligent Systems Université de Sousse Ecole Nationale d'Ingénieurs de Sousse Sousse Tunisia

Photovoltaic (PV) emulators (PVEs) become a critical tool to test the PV generation system such as the maximum power point tracking (MPPT) converter and the PV system control. The latter ensures a controllable light source environment that mimics the output characteristics of a real PV panel. In this context, this paper deals with the implementation of different MPPT techniques to a developed low-cost PV emulator based on two-diode model. Mainly, The PVE structure is formed by three parts that are the PV model, the control strategy, and the power stage. In an initial phase, the PV emulator system is presented, and its three main components are described. In a second phase, three MPPT algorithms, namely, the perturb and observe (P&O) technique, the incremental conductance (IC) technique and the sliding mode control (SMC) technique are studied and applied to the developed PVE. The acquired simulation results show that the developed PVE can follow accurately the output characteristics of the PV module. Moreover, the studied MPPT algorithms allows the PVE to operate at its maximum power during irradiance and temperature variations. As compared to the P&O and the IC techniques, the SMC provides a good response in MPP tracking without considerable ripples.

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Manipulator-based autonomous inspections at road checkpoints:Application of faster YOLO for detecting large objects

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Defence technology（防务技术） 2022年第6期18卷 937-951页

作者： Qing-xin Shi Chang-sheng Li Bao-qiao Guo Yong-gui Wang Huan-yu Tian Hao Wen Fan-sheng Meng Xing-guang Duan School of Mechatronical Engineering Beijing Institute of TechnologyBeijing100081China Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of TechnologyBeijing100081China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China

With the increasing number of vehicles,manual security inspections are becoming more laborious at road *** address it,a specialized Road Checkpoints Robot(RCRo)system is proposed,incorporated with enhanced You Only Look Once(YOLO)and a 6-degree-of-freedom(DOF)manipulator,for autonomous identity verification and vehicle *** modified YOLO is characterized by large objects’sensitivity and faster detection speed,named“LF-YOLO”.The better sensitivity of large objects and the faster detection speed are achieved by means of the Dense module-based backbone network connecting two-scale detecting network,for object detection tasks,along with optimized anchor boxes and improved loss *** the manipulator motion,Octree-aided motion control scheme is adopted for collision-free motion through Robot Operating System(ROS).The proposed LF-YOLO which utilizes continuous optimization strategy and residual technique provides a promising detector design,which has been found to be more effective during actual object detection,in terms of decreased average detection time by 68.25%and 60.60%,and increased average Intersection over Union(Io U)by 20.74%and6.79%compared to YOLOv3 and YOLOv4 through *** comprehensive functional tests of RCRo system demonstrate the feasibility and competency of the multiple unmanned inspections in practice.

关键词： Robot applications Object detection Vehicle inspection Identity verification You only look once(YOLO)

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FEM and New Diffusive Representation Technique Application for DSIM Thermal Transition Analysis

FEM and New Diffusive Representation Technique Application f...

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International Conference on advanced systems and Electric Technologies (IC_ASET)

作者： Thouraya Guenenna Khaled Ben Smida Adel Khedher LATIS-Laboratory of Advanced Technology and Intelligent Systems Université de Sousse Ecole Nationale d'Ingénieurs de Sousse Sousse Tunisie

Induction Motor (IM) Lifetime is very sensitive to temperature increase due to the stator windings fragility and motor losses. Therefore, thermal analysis is a crucial process that should be taken into consideration while simulating the mathematical model of the IM. This paper presents a modeling study of DSIM (Double Stars Induction Machine) with one broken phase stator. Additionally, this article proposes two thermal methods that are used to predict and compared the temperature rise in DSIM shifted by 30°: the finite element method (FEM) and the diffusive representation approach. Thus, the main objective of this article is to show the impact of different machine powering scenarios (rated-load, no-load and rotor-locked) on the transient temperature variation of the DSIM. The effectiveness of the diffusive approach and its ability to monitor the temperature in the machine has been proved by comparative study of two temperature prediction models.

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Color liquid crystal grating based color holographic 3D display system with large viewing angle

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Light(Science & Applications) 2024年第1期13卷 103-112页

作者： Di Wang Yi-Long Li Fan Chu Nan-Nan Li Zhao-Song Li Sin-Doo Lee Zhong-Quan Nie Chao Liu Qiong-Hua Wang School of Instrumentation and Optoelectronic Engineering Beihang UniversityBeijing 100191China State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100191China Display Technology Research Center Seoul National UniversityGwanak-ro 1Gwanak-guSeoul 08826Republic of Korea Key Lab of Advanced Transducers and Intelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

Holographic 3D display is highly desirable for numerous applications ranging from medical treatments to military ***,it is challenging to simultaneously achieve large viewing angle and high-fidelity color reconstruction due to the intractable constraints of existing ***,we conceptually propose and experimentally demonstrate a simple and feasible pathway of using a well-designed color liquid crystal grating to overcome the inevitable chromatic aberration and enlarge the holographic viewing angle,thus enabling large-viewing-angle and color holographic 3D *** use of color liquid crystal grating allows performing secondary diffraction modulation on red,green and blue reproduced images simultaneously and extending the viewing angle in the holographic 3D display *** principle,a chromatic aberration-free hologram generation mechanism in combination with the color liquid crystal grating is proposed to pave the way for on such a superior holographic 3D *** proposed system shows a color viewing angle of~50.12°,which is about 7 times that of the traditional system with a single spatial light *** work presents a paradigm for achieving desirable holographic 3D display,and is expected to provide a new way for the wide application of holographic display.

关键词： holographic angle crystal

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Impulsive Control of Heterogeneous Multi-agent systems with Saturation Constraint and Time Delay

Impulsive Control of Heterogeneous Multi-agent Systems with ...

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2024 China Automation Congress, CAC 2024

作者： Jiao, Ranran Li, Bo Chen, Xiangyong Jiang, Xiaowei School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control Intelligent Automation of Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan China School of Finance Anhui University of Finance and Economics Bengbu China Key Laboratory of Complex systems and Intelligent Computing in Universities of Shandong Linyi University Linyi China

ISBN: (纸本)9798350368604

This paper addresses the problem of leader-following consensus in heterogeneous multi-agent systems (HMAS) with input saturation and communication delay. Given the practical differences between leader and follower dimensions, we design virtual leaders to address this problem by allowing actual leaders and followers to communicate with virtual leaders separately, thus enabling indirect communication between actual leaders and followers. Additionally, the control protocol proposed in this paper takes into account the effects of input saturation and time delay that exist in real communication. At last, a simulation example is presented to demonstrate the effectiveness of the designed control protocol. © 2024 IEEE.

关键词： Multi agent systems

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