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Wyszukujesz frazę "hybrid modeling" wg kryterium: Wszystkie pola


Wyświetlanie 1-3 z 3
Tytuł:
Hybrid system for modeling and optimization of production chain in metal forming
Autorzy:
Rauch, L.
Madej, L.
Pietrzyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/1429405.pdf
Data publikacji:
2008
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
optimization
modelling
production chain
metal forming
Opis:
The paper presents design and implementation of the hybrid system, which is the part of investigation focused on application of multiscale modeling in simulation of real industrial processes. The hybrid system is dedicated to support production processes based on metal forming, by using artificial intelligence and optimization algorithms. The proposed system is based on the multilayer architecture and consists of several functional components responsible for management of production process, modeling and simulations and, finally, optimization. The latter module aims at searching for optimial parameters of selected production processes, which form production chain, i.e. rod rolling and cold forging. Optimization is performed using results obtained from multiscale modeling calculations. Then, the optimized approach is passed directly to the configuration and control centre of the real industrial process as a feedback to obtain better quality of products employing lower costs of manufacturing. Moreover, the hybrid system is designed to exchange information with other external systems implemented inside an enterprise e.g. ERP and its modules. The internal structure of presented system is described in the paper, as well as measurable advantages of hybrid system application to real environment.
Źródło:
Journal of Machine Engineering; 2008, 8, 2; 14-22
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and selection of the work of a powertrain hybrid wheeled vehicle
Autorzy:
Banaś, W.
Kost, G.
Nierychlok, A.
Powiązania:
https://bibliotekanauki.pl/articles/99683.pdf
Data publikacji:
2011
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
hybrid vehicle
concept of control
stabilization process
Opis:
The paper presents the main issues of control the combustion engine by stabilizing power. Algorithms work, certain flue units for which the work of the internal combustion engine is most effective. A method of modeling the flow of energy between an engine and an electric generator as a function of engine speed and load of the specific fuel consumption - the greatest efficiency. Presented a stabilization system diagram under the internal combustion engine and generator for hybrid vehicle. Described to adopted algorithm the stabilization of power for the engine and generator exhaust in the rotational speed to stabilize at a point and stability in the area.
Źródło:
Journal of Machine Engineering; 2011, 11, No. 1-2; 162-170
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and convergence analysis of directed energy deposition simulations with hybrid implicit / explicit and implicit solutions
Autorzy:
Buhl, Johannes
Israr, Rameez
Bambach, Markus
Powiązania:
https://bibliotekanauki.pl/articles/99870.pdf
Data publikacji:
2019
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
steel
implicit/explicit
thermal cycles
Opis:
Conventional metal manufacturing techniques are suitable for mass production. However, cheaper and faster alternatives are preferred for small batch sizes and individualized components. Directed energy deposition (DED) processes allow depositing metallic material in almost arbitrary shapes. They are characterized by cyclic heat input, hence heating and cooling every point in the workpiece several times. This temperature history leads to distribution of mechanical properties, distortions, residual stresses or even fatigue properties in the part. To avoid experimental trial-and-error optimization, different methods are available to simulate DED processes. Currently, the wire arc additive manufacturing (WAAM) is the most competitive DED process. In this work, a simulation method for the WAAM process is established and validated, which should be capable to calculate global effects (e.g. distortions, residual stresses) of real WAAM-processes with duration of hours and thousands of weld beads. The addition of beads and layers is simulated by the element birth and death technique. The elements are activated according to the movements of the heat source (arc). In this paper, the influence of the time step, the mesh size and the material properties of the inactive elements in hybrid implicit / explicit and fully implicit solutions are evaluated with respect to the computation time and stability. This investigation concludes several recommendations for AM-modelling. For example, a low Young’s modulus (100 N/mm2) for the inactive elements show nearly no influences on the welding simulation, but introduces numerical instabilities in case of multiple welding beads. The Young’s modulus should be increased to 1.000 N/mm2 for small mesh-sizes, small step-sizes and many beads, even when it introduces unwanted stresses.
Źródło:
Journal of Machine Engineering; 2019, 19, 3; 94-107
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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