160 research outputs found

    The application of industrial robots in concrete formwork fabrication

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    Hlavní cíl této práce je popsání procesů navrhování, modelovaní, výroby a opracovaní bednění pro tvarově složité betonové prvky při aplikaci několika sofistikovaných softwarů a technologií. Také tato práce obsahuje přehled běžných problémů, ovlivňujících produktivitu a efektivitu ve stavebnictví, které mohou být vyřešeny pomocí automatizace a digitalizace staveniště. Dále jsou uvedeny příklady použiti moderních technologií ve stavebnictví. Autor prozkoumává dnešní stav českého stavebnictví a popisuje jeho schopnost uplatnit nové technologie díky příznivému ekonomickému prostředí.The main aim of this work is to describe design processes, modelling and manufacturing of the formwork for complex concrete structures with the application of several sophisticated software and technologies. Moreover, this work deals with the most widespread problems that have an impact on productivity and efficiency in the construction industry. These problems can be solved by automation and digitation of the construction site. Successful examples of utilizing modern technologies in construction are mentioned as well. The author reviews the contemporary conditions of the Czech construction sector and explains its ability to employ new technologies due to its favourable economic environment

    Optimization of Operation Sequencing in CAPP Using Hybrid Genetic Algorithm and Simulated Annealing Approach

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    In any CAPP system, one of the most important process planning functions is selection of the operations and corresponding machines in order to generate the optimal operation sequence. In this paper, the hybrid GA-SA algorithm is used to solve this combinatorial optimization NP (Non-deterministic Polynomial) problem. The network representation is adopted to describe operation and sequencing flexibility in process planning and the mathematical model for process planning is described with the objective of minimizing the production time. Experimental results show effectiveness of the hybrid algorithm that, in comparison with the GA and SA standalone algorithms, gives optimal operation sequence with lesser computational time and lesser number of iterations

    Optimization of Operation Sequencing in CAPP Using Hybrid Genetic Algorithm and Simulated Annealing Approach

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    In any CAPP system, one of the most important process planning functions is selection of the operations and corresponding machines in order to generate the optimal operation sequence. In this paper, the hybrid GA-SA algorithm is used to solve this combinatorial optimization NP (Non-deterministic Polynomial) problem. The network representation is adopted to describe operation and sequencing flexibility in process planning and the mathematical model for process planning is described with the objective of minimizing the production time. Experimental results show effectiveness of the hybrid algorithm that, in comparison with the GA and SA standalone algorithms, gives optimal operation sequence with lesser computational time and lesser number of iterations

    Autonomous Navigation of Automated Guided Vehicle Using Monocular Camera

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    This paper presents a hybrid control algorithm for Automated Guided Vehicle (AGV) consisting of two independent control loops: Position Based Control (PBC) for global navigation within manufacturing environment and Image Based Visual Servoing (IBVS) for fine motions needed for accurate steering towards loading/unloading point. The proposed hybrid control separates the initial transportation task into global navigation towards the goal point, and fine motion from the goal point to the loading/unloading point. In this manner, the need for artificial landmarks or accurate map of the environment is bypassed. Initial experimental results show the usefulness of the proposed approach.COBISS.SR-ID 27383808

    Autonomous Navigation of Automated Guided Vehicle Using Monocular Camera

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    This paper presents a hybrid control algorithm for Automated Guided Vehicle (AGV) consisting of two independent control loops: Position Based Control (PBC) for global navigation within manufacturing environment and Image Based Visual Servoing (IBVS) for fine motions needed for accurate steering towards loading/unloading point. The proposed hybrid control separates the initial transportation task into global navigation towards the goal point, and fine motion from the goal point to the loading/unloading point. In this manner, the need for artificial landmarks or accurate map of the environment is bypassed. Initial experimental results show the usefulness of the proposed approach.COBISS.SR-ID 27383808

    Modelado, simulación y control de un robot serial de dos eslabones con Matlab / Simulink

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    Relevant aspects of the kinematic position control of a serial two-link robot with revolute joints are presented. Presented formulation is supported with simulation and experimental results using the Matlab toolboxes Simulink and Simmechanics. Used hardware was built as course work of Mechatronic Engineering students. It integrated two linkages, two identical Maxon motors, to servo controllers and one EPOS2 circuit. Practical results simulated the drawing of a circle, a triangle and a rectangle, three key shapes in the industry manufacturing tasks or painting of industry elements. The joint error was lower than three degrees in the three cases, considered satisfactory for prototype hardware. The workspace error was calculated based on the real angles for the circle case. Developed control software for the Maxon motors is available on the internet (MathWorks File Exchange).Se presentan los aspectos relevantes del control cinemático de posición de un robot serial de dos eslabones con juntas rotatorias, soportados en simulación y experimentación con los toolboxes Simulink y SimMechanics de Matlab. El hardware fue construido como trabajo de curso de Ingeniería Mecatrónica, integrando dos eslabones, dos motores Maxon, dos tarjetas servo y un circuito EPOS2. Las pruebas ilustraron la descripción de un círculo, un triángulo y un rectángulo por parte del robot, escogidas por ser formas típicas de tareas cinemáticas de la manufactura o pintura de componentes industriales. En los tres ejemplos el error de juntas (espacio articular) es inferior a tres grados, resultados considerados satisfactorios para un hardware prototipo. Los valores reales de los ángulos obtenidos son utilizados para cuantificar el error en el espacio de la herramienta para el caso de la trayectoria circular. El software desarrollado para controlar los motores Maxon está disponible en internet (Intercambio de Archivos de MathWorks)

    Engineering for a changing world: 60th Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023 : programme

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    In 2023, the Ilmenau Scientific Colloquium is once more organised by the Department of Mechanical Engineering. The title of this year’s conference “Engineering for a Changing World” refers to limited natural resources of our planet, to massive changes in cooperation between continents, countries, institutions and people – enabled by the increased implementation of information technology as the probably most dominant driver in many fields. The Colloquium, supplemented by workshops, is characterised but not limited to the following topics: – Precision engineering and measurement technology Nanofabrication – Industry 4.0 and digitalisation in mechanical engineering – Mechatronics, biomechatronics and mechanism technology – Systems engineering – Productive teaming - Human-machine collaboration in the production environment The topics are oriented on key strategic aspects of research and teaching in Mechanical Engineering at our university

    Production and application of textile materials

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    This specialized publication is dedicated to technical and technological solutions in textile production. Engineering solutions in the production of fibers and fabrics for both technical and domestic use are considered. Particular attention in the book is given to the study of textile products for biomedical applications. Modern medical fabrics and fibers are used as dressing and suture material and significantly accelerate the recovery processes after surgical operations and burn injuries. Fibers and fabrics are currently often used as a reinforcing element in the production of various composite materials, which are often used in mechanical engineering and in the construction sector. A separate chapter is devoted to textile reinforcing materials. Environmental problems in textile production are mainly related to the dyeing process and the chemical treatment of fabrics and fibers. Some aspects of textile dyeing and wastewater treatment processes are also discussed in this publication. The book will be useful to specialists involved in textile production and related industries
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