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Science and Technology Innovation (IAECST), International Academic Exchange Conference on

作者： Yulu Zeng Zhifang Zhu Jiaxin Wan Ran Zhao Senlin Huang Jiangxi Province Key Laboratory of Precision Drive & Control Nanchang Institute of Technology Nanchang China Nanchang Institute of Technology Jiangxi Province Key Laboratory of Precision Drive & Control Zhejiang Sci-Tech University Faculty of Mechanical Engineering and Automation Nanchang China Zhongyuan-Petersburg Aviation College Zhongyuan University of Technology Zhengzhou China

ISBN: (纸本)9781665402682

This paper presented a large displacement precision actuator based on magnetic shape memory alloy (MSMA). A Ni-Mn-Ga rod was chosen as the driving source for the proposed actuator. The structure of the actuator was designed, and the its parameters are determined by calculation. The magnetic field is simulated by the finite element simulation software. After determining that the magnetic field meets the requirements, the prototype is made for experiments. The experimental results show that the maximum output displacement of the magnetic shape memory alloy actuator reaches 1.07mm when the pre-stress is 0 MPa. Which indicates that the design of the device is reasonable and is of great significance for broadening the application field of micro-displacement actuators.

关键词： Actuators Magnetic flux density Magnetic field measurement Shape memory alloys Current measurement Prototypes Software

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Educational robotics with tangible programming: A digital circuit for blocks communication with code and visual feedback transfer capabilities

Educational robotics with tangible programming: A digital ci...

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IEEE Latin American Robotics Symposium, LARS

作者： Jessica Toledo Salles Cristiane Pelisolli Cabral Rosane Aragon Alexandre Da Silva Simões Postgraduate Program in Electrical Engineering São Paulo State University (Unesp) Institute of Science and Technology Sorocaba Brazil Postgraduate Program in Education Federal University of Rio Grande do Sul (UFRGS) Porto Alegre Brazil Faculty of Education (FACED) Federal University of Rio Grande do Sul (UFRGS) Porto Alegre Brazil Control and Automation Engineering Department (DECA) São Paulo State University (Unesp) Institute of Science and Technology Sorocaba Brazil

ISBN: (数字)9781665462808

ISBN: (纸本)9781665462815

A large number of robotic kits is commercially available for children education nowadays. Regarding the programming possibilities of these kits, they are usually divided into three categories: i) textual languages based kits, ii) digital blocks based kits and iii) tangible blocks based kits. In tangible blocks kits, the programming instructions are represented by physical - touchable - elements like blocks, cards or buttons. Since these are concrete objects, they are usually more playful and accessible for young children mainly in the concrete operational stage. Another relevant aspect in robotic kits is the possibility for children to follow the code execution at runtime. This process may be crucial for comprehending the programming process and for developing debugging abilities. In tangible programming based kits, this visual tracking is far more complex than in textual or digital blocks based kits since it typically requires the transmission of information between a lot of distinct physical pieces. The present work proposes and discusses the implementation of a digital electronic circuit with bluetooth communication designed for educational robotics kit and capable to provide a visual feedback. Results demonstrate that the proposed circuit is functional and feasible for embedding in robotic kits at a low cost.

关键词： Visualization Codes Runtime Costs Education Debugging Robots

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Robust Iterative Learning control for Spatially Interconnected Systems using 2D control Theory

Robust Iterative Learning Control for Spatially Interconnect...

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European control Conference (ECC)

作者： Bartłomiej Sulikowski Krzysztof Gałkowski Daniel Trzciński Eric Rogers Anton Kummert Institute of Control and Computation Engineering University of Zielona Góra Zielona Góra Poland Institute of Automation Electronic and Electrical Engineering University of Zielona Góra Zielona Góra Poland Department of Electronics and Computer Science University of Southampton Southampton UK Faculty of Electrical Information and Media Engineering University of Wuppertal Wuppertal Germany

This paper develops a class of iterative learning control (ILC) laws for a subclass of uncertain spatially interconnected systems. Model uncertainties appear both in the state and the output equation of the dynamics modeled in the 2D systems setting to which existing results are not applicable. The first stage is to write the dynamics in 2D model form. Then the stability theory for a distinct class of 2D systems known as repetitive processes is used to develop the ILC law in the case of differential dynamics. This analysis results in a design algorithm that can be applied using linear matrix inequalities.

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An Application for Solving Truth Functions 9th

An Application for Solving Truth Functions

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9th Computer Science On-line Conference, CSOC 2020

作者： Pokorný, Pavel Ševčík, Daniel Department of Computer and Communication Systems Faculty of Applied Informatics Tomas Bata University in Zlín Nad Stráněmi 4511 Zlín760 05 Czech Republic Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Nad Stráněmi 4511 Zlín760 05 Czech Republic

ISBN: (纸本)9783030519643

Nowadays, many technical devices are controlled by logic circuits. These circuits evaluate the situation based on the proposed truth functions, which they then use to perform one of the defined actions. In line with the increasing complexity of individual technical devices, the logic circuits and truth functions are also increasingly complex. For this reason, it makes sense to minimise these functions since they can thereby achieve a simpler technological process and the higher reliability of whole logic systems. This paper describes the Karnaugh Studio application, which resolves the minimisation of these truth functions - and was developed at our faculty (FAI, TBU in Zlín). The minimisation is performed using the Karnaugh Map Method - with support for up to eight variables on input. The application is based on the C++ programming language and the Dear ImGui and Magick++ libraries. Its functionality has been verified on a number of examples. This proved its applicability and ability to be used in the solution of logic circuits in industrial practice. © 2020, Springer Nature Switzerland AG.

关键词： Boolean functions

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Learning Dictionaries from Physical-Based Interpolation for Water Network Leak Localization

arXiv

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arXiv 2023年

作者： Irofti, Paul Romero-Ben, Luis Stoican, Florin Puig, Vicenç Department of Computer Science Faculty of Mathematics and Computer Science University of Bucharest 010014 Romania The Institute for Logic and Data Science Popa Tatu 18 Bucharest010805 Romania The Institut de Robòtica i Informàtica Industrial CSIC-UPC Llorens i Artigas 4-6 Barcelona08028 Spain The Universitat Politècnica de Catalunya Campus de Terrassa Gaia Building Rambla Sant Nebridi 22 Terrassa Barcelona08222 Spain The Deptartment of Automation Control and Systems Engineering Politehnica University of Bucharest 060042 Romania

This article presents a leak localization methodology based on state estimation and learning. The first is handled by an interpolation scheme, whereas dictionary learning is considered for the second stage. The novel proposed interpolation technique exploits the physics of the interconnections between hydraulic heads of neighboring nodes in water distribution networks. Additionally, residuals are directly interpolated instead of hydraulic head values. The results of applying the proposed method to a well-known case study (Modena) demonstrated the improvements of the new interpolation method with respect to a state-of-the-art approach, both in terms of interpolation error (considering state and residual estimation) and posterior localization. Copyright © 2023, The Authors. All rights reserved.

关键词： Interpolation

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Convergence analysis of dual decomposition algorithm in distributed optimization: Asynchrony and inexactness

arXiv

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arXiv 2021年

作者： Su, Yifan Wang, Zhaojian Cao, Ming Jia, Mengshuo Liu, Feng The State Key Laboratory of Power System Department of Electrical Engineering Tsinghua University Beijing100084 China The Key Laboratory of System Control and Information Processing Ministry of Education of China Department of Automation Shanghai Jiao Tong University Shanghai200240 China The Faculty of Science and Engineering University of Groningen Groningen9747 AG Netherlands

Dual decomposition is widely utilized in distributed optimization of multi-agent systems. In practice, the dual decomposition algorithm is desired to admit an asynchronous implementation due to imperfect communication, such as time delay and packet drop. In addition, computational errors also exist when individual agents solve their own subproblems. In this paper, we analyze the convergence of the dual decomposition algorithm in distributed optimization when both the asynchrony in communication and the inexactness in solving subproblems exist. We find that the interaction between asynchrony and inexactness slows down the convergence rate from O(1/k) to O(1/√k). Specifically, with a constant step size, the value of objective function converges to a neighborhood of the optimal value, and the solution converges to a neighborhood of the exact optimal solution. Moreover, the violation of the constraints diminishes in O(1/√k). Our result generalizes and unifies the existing ones that only consider either asynchrony or inexactness. Finally, numerical simulations validate the theoretical results. Copyright © 2021, The Authors. All rights reserved.

关键词： Multi agent systems

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Social Manufacturing Pattern in the Intelligent Reform of the Shoes and Clothing Industry

Social Manufacturing Pattern in the Intelligent Reform of th...

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Digital Twins and Parallel Intelligence (DTPI), IEEE International Conference on

作者： Yansong Cao Yutong Wang Juwu Dai Xihao Zhu Fei-Yue Wang Macau Institute of Systems Engineering Macau University of Science and Technology Macau China The State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Ningbo Sanbody Intelligent Technology co. LTD Ningbo China Faculty of Science and Engineering University of Nottingham Ningbo China

Along with economic globalization, the shoes and clothing market is undergoing huge changes and is facing increasing individualized demands. To realize personalized customization, we propose a social manufacturing pattern for the shoes and clothing industry. On the customer side, we collect costumer information with the help of 3D scanning and virtual fitting. On the production side, we replace human labor with intelligent production equipment. On the enterprise management side, we construct a cloud platform to realize source maximization. Through this social manufacturing pattern, we expect to accelerate the intelligent reform of the shoes and clothing industry.

关键词： Product customization Cloud computing Three-dimensional displays Social networking (online) Production equipment Footwear Clothing industry

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Arbitrary state transition of open qubit system based on switching control

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Automatica 2025年 179卷

作者： Guangpu Wu Shibei Xue Shan Ma Sen Kuang Daoyi Dong Ian R. Petersen Department of Automation Shanghai Jiao Tong University Shanghai 200240 PR China Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 PR China School of Automation Central South University Changsha 410083 PR China Department of Automation University of Science and Technology of China Hefei 230027 PR China Australian Artificial Intelligence Institute Faculty of Engineering and IT University of Technology Sydney Ultimo 2007 NSW Australia School of Engineering Australian National University Canberra ACT 2601 Australia

We present a switching control strategy based on Lyapunov control for arbitrary state transitions in open qubit systems. This strategy can prevent the state from entering invariant or singularity sets, effectively driving the system ultimately to a sufficiently small neighborhood of target states, which relaxes strict constraints on system models imposed by special target states compared to existing works. For the arbitrary transition, practical finite-time stability (PFTS) and its contractive version (PFTCS) conditions are given, respectively, where asymptotic stability is unattainable in open quantum systems in general. The efficacy of our method is demonstrated in examples of a qubit affected by amplitude damping, dephasing, and depolarizing decoherence.

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UAV Image Mosaicing Based Multi-Region Local Projection Deformation

UAV Image Mosaicing Based Multi-Region Local Projection Defo...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Quan Xu Linbo Luo Jun Chen Wenping Gong Donghai Guo School of Mechanical Engineering and Electronic Information China University of Geosciences Wuhan School of Automation China University of Geosciences Wuhan Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Faculty of Engineering China University of Geosciences Wuhan

ISBN: (数字)9781728163741

ISBN: (纸本)9781728163758

The goal of unmanned aerial vehicle (UAV) image mosaicing is to create natural-looking mosaics free of artifacts due to the parallax of the image and relative camera motion. UAV remote sensing is a low-altitude technology and the UAV imaged scene is not effectively planar, yielding parallax on images. In this paper, we apply local homography to match UAV images, which can reduce misalignment artifacts or “ghosting” in the results compared with 2D projective transforms or global homography. In addition, when an object in three dimensions is mapped to an image plane, different surfaces have different projections. These projections vary with the viewpoint in a sequence of UAV images, which still causes artifacts near some tall buildings if we only use local homography. We propose a novel stitching method based multi-region local projection deformation, that divides the overlapping regions of input images into several regions, then meshes image to calculate local projections by partitioned regions. Specifically, we use a strategy where multiple regions have different weights for calculating local projections, which can significantly reduce ghosting due to these projections vary with the viewpoint and parallax. The benefits of the proposed approach are demonstrated using a variety of challenging cases.

关键词： Unmanned aerial vehicles Remote sensing Geology Two dimensional displays Task analysis Buildings Transmission line matrix methods

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High-entropy alloys (HEAs) have emerged as a transformative class of materials in materials science, characterized by their multi-principal element compositionsSynthesis and Investigation of Powder and Magnetic Properties of AlFeNiCoMn High-Entropy Alloy Prepared by Mechanical Milling: Effect of Milling Time

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Materials Today Communications 2025年

作者： Büşra Tunç İlyas Somunkıran Serdar Özkaya Müslim Çelebi Aykut Çanakçı Artvin Çoruh University Borçka Acarlar Vocational School Department of Control and Automation Artvin Turkiye Fırat University Faculty of Technology School of Civil Aviation Department of Aircraft Maintenance and Repair Elazig Turkiye Karadeniz Technical University Department of Metallurgy and Materials Engineering Trabzon Turkiye

AlFeNiCoMn high-entropy alloy (HEA) powders were synthesised using mechanical alloying, and the effect of milling time on their microstructural evolution, mechanical behaviour, and magnetic properties was systematically investigated. The alloy powders were subjected to milling durations ranging from 1 to 15 h, and their morphological, crystallographic, and magnetic transformations were analysed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), differential scanning calorimetry (DSC), Vickers hardness testing, and vibrating sample magnetometry (VSM). The results demonstrated that an increase in milling time led to significant particle refinement, enhanced homogeneity in elemental distribution, and a progressive phase transformation from individual elemental phases to a stable solid solution structure. This can be attributed to the repeated fracturing and cold welding of powders during milling, promoting diffusion and solid solution formation. XRD analysis confirmed a substantial decrease in crystallite size from 22.3 nm (5 h) to 7.8 nm (15 h), which is consistent with the intense plastic deformation and grain subdivision. The microhardness of the HEA powders increased from 260 HV at 1 h of milling to 680 HV at 15 h due to grain refinement, solid solution strengthening, and work hardening effects. Magnetic characterization revealed a decline in saturation magnetization (Ms), from 83.49 emu/g (0 h) to 66.84 emu/g (15 h), attributable to an increase in structural disorder and lattice strain that weakens magnetic exchange interactions. Conversely, coercivity (Hc) exhibited a substantial enhancement, from 85.6 Oe (0 h) to 228.5 Oe (15 h), due to increased grain boundary density and pinning effects caused by refinement. DSC analysis confirmed the thermal stability of the alloy powders above 200 °C, suggesting their suitability for high-temperature applications.

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