Temat: optimization tool - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Tools for optimizing performance of VOYages at sea
Autorzy:: Johannessen, J. A.
Perrin, A.
Gaultier, L.
Herlédan, S.
Pouplin, C.
Collard, F.
Maze, J. P.
Dussauze, M.
Rapp, J.
Fanebust, R.
Andersen, S.
Franks, O.
Meyer, R.
Tematy:: voyage at sea
Copernicus Marine Environment Monitoring Service
optimization tool
synthetic aperture radar
finite-size lyapunov exponent
route optimization
sea surface temperature
route optimization algorithm; Pokaż więcej
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Powiązania:: https://bibliotekanauki.pl/articles/1841544.pdf Link otwiera się w nowym oknie
Opis:: The aim of the TOPVOYS project supported by the MarTERA ERA-Net Cofund program within the European Commission is to advance and implement analyses tools and decision support system for voyage optimisation. Based on marine weather analyses and forecasts combined with near real time satellite-based observations of wind, wave and surface current conditions as well as sea surface temperature fields the best shipping route are examined. The proposed approach aims to identify the optimum balance between minimisation of transit time and fuel consumption as well as reduction of emissions without placing the vessel at risk to damage and or crew injury. As such it is compliant with the International Maritime Organization guidelines [6] for ship routeing to keep the traffic smooth and avoid accidents, notably in the presence of unfavorable marine meteorological conditions. The tool performances will be demonstrated both in post-voyage analyses and real time operations for the North Atlantic Ocean crossings, voyages from Europe through the Mediterranean Sea and the Suez Channel to the Far East (e.g. China, South Korea) and voyages around Southern Africa.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Machining performance optimization of Parallel Kinematic Machines tools with regard to their anisotropic behaviour
Autorzy:: Pateloup, S.
Bonnemains, T.
Chanal, H.
Bouzgarrou, B. C.
Duc, E.
Ray, P.
Tematy:: parallel kinematic machine too
kinematic model
static model
tool path optimization; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/1429122.pdf Link otwiera się w nowym oknie
Opis:: Today, Parallel Kinematic Machines tools (PKMs) appear in automotive and aeronautic industries. These machines allow a benefit of productivity due to their higher kinematics performances than Serial Kinematic Machines tools (SKMs). However, their machining accuracy is lower. Moreover, the compensation of the defects which penalizes the machined parts quality is difficult due to their anisotropic behaviour. Thus, this article deals with the development of methods improving the machined parts quality and the productivity. In order to improve parts quality, the static behaviour of the machine structure is considered with a model taking into account joints and legs compliances. Then, it allows determining a static workspace. About the productivity, the improvement of kinematics performances is performed through an optimization work of the non productive tool path between cutting operations. The computed tool path must verify a minimum time constraint and avoid collisions between the tool and the machined part. All the methods are illustrated with the PKM Tripteor X7 developed by PCI.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: An integrated approach for improving tool provisioning efficiency
Autorzy:: Denysenko, Yuliia
Ivanov, Vitalii
Luscinski, Slawomir
Zaloga, Viliam
Tematy:: tool provisioning
information system
decision making
optimization
sustainable development; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/1841403.pdf Link otwiera się w nowym oknie
Opis:: The specificity of tool provisioning is conditioned using tooling, the quantity of which exceeds the nomenclature of the manufactured goods considerably. Therefore, for modern enterprises, first-priority issues are harmonizing the processes of tool provisioning systems, increasing the level of the reaction of this system to changes, obtaining operational control over the production system, and, thus, improving the efficiency of the production process. In this paper, a mathematical model of decision-making based on determining the optimal strategy for the process flow was proposed to improve the efficiency of the information system for quality management of tool provisioning. It is suggested to use the sustainable development factor of information system for quality management of tool provisioning to make decisions about the path of the tooling process, which considers the requirements of international standards for management systems (ISO 9001, ISO 45001, etc.). This model is based on the application of graph optimization theory, fuzzy logic, and Markov chains. The use of this model is universal and will increase the validity of operational management decisions, increase productivity, reduce resource dependency, and, therefore, reduce the costs of tool provisioning, which directly affects the cost of production and competitiveness of the enterprise as a whole.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Criteria for the optimization of production processes in machining of metallic materials
Autorzy:: Matisková, D.
Balog, M.
Husár, J.
Tematy:: production process
criteria
optimization process
machine tool
mathematical methods; Pokaż więcej
Wydawca:: STE GROUP
Powiązania:: https://bibliotekanauki.pl/articles/410048.pdf Link otwiera się w nowym oknie
Opis:: The paper deals with the optimization of production processes and the setting of criteria for reducing production costs. Any company is not just a leap in production, but a lean has to be gradually transferred to all its activities. This created the concept of a lean company first. The skill of an enterprise is to perform only the activities that are needed, to do them right for the first time, to make them faster than others and to spend less resources at the same time. The company's business is that the company does exactly what the customer wants, with a minimum number of activities that do not add value to the product or service. The Lean Production System focuses mainly on eliminating waste in every activity of the manufacturing enterprise.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Study on Tool Condition Parameters Intended for Smart Tool Management in Filleted End Milling
Autorzy:: Sekine, Tsutomu
Tematy:: optimization
multi-axis CNC machining
filleted end mill
tool condition parameter
machining conditions; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/2123284.pdf Link otwiera się w nowym oknie
Opis:: Filleted end milling is commonly used as a versatile manufacturing process, whereas the optimization for tool condition management is one of the continuously noticed topics. It can also contribute to the achievement of Sustainable Development Goals. A lot of outcomes have been reported so far in the experimental investigations of tool condition parameters. However, the findings and knowledge from theoretical perspective are relatively scarce to advance smart tool management. Hence, the aim of this study is to give theoretical consideration with tool condition parameters. The investigations focus on filleted end milling with some variations of machining conditions. Several tool condition parameters were theoretically proposed after illustrating geometrical modeling with variable description. Then, the demonstrations and discussion were made based on the computational results in filleted end milling. The results visually and numerically ascertained novel findings regarding several characteristics of tool condition parameters
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Modernization of the stamping process using eddy current and load sensors in the manufacturing of automotive parts
Autorzy:: Skardžius, Juras
Nagurnas, Saulius
Skačkauskas, Paulius
Tematy:: manufacture of automotive part
stamping
progressive tool
performance optimization
eddy current sensor
load sensor; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Powiązania:: https://bibliotekanauki.pl/articles/59112775.pdf Link otwiera się w nowym oknie
Opis:: In this research, an experimental study is presented, which extends the usage of eddy current and load sensors in progressive stamping tools to optimize and continuously monitor the stamping process. The purpose of the research was to automatically detect material scrap before it leaves imprints on the part and based on the sensor’s readings, determine the optimal tool bottom position. The scrap thickness that needs to be detected was established in an experiment by visual evaluation of the result. To determine the optimal bottom position, a linear regression method was used, and the results were evaluated by part quality parameter. The research results consist of separate detection steps and the conclusion was made only after the serial type production. Overall results of scrap detection were influenced by the design of the existing tool. The bottom position detection consists of various readings interpretations and multi-step method descriptions. Based on the acquired results of both methods, implementing the in–die sensors was considered successful and applicable to new tools.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Optimization of tool wear during plunge turning of hardened 18CrMo4 steel
Optymalizacja zużycia narzędzia podczas wgłębnego toczenia zahartowanej stali 18CrMo4
Autorzy:: Pytlak, B.
Tematy:: plunge hard turning
tool wear
optimization
Taguchi method
wgłębne toczenie na twardo
zużycie narzędzia
optymalizacja
metoda Taguchi’ego; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/175736.pdf Link otwiera się w nowym oknie
Opis:: The paper investigates the influence of cutting parameters (vc, f, m) on the tool wear VBB during finish plunge hard turning of hardened 18CrMo4 steel with the use of Cubical Boron Nitride (CBN) inserts. The experimental research was conducted according to the Taguchi methodology. On the basis of the research results obtained, optimal values of cutting parameters were determined, for which the tool wear VBB is minimal. Next, the analysis of variance ANOVA was performed in order to determine the significance of the impact of particular cutting parameters on the optimized criteria. Verification tests which were carried out confirm the conclusions drawn that the greatest influence on tool wear VBB has the cutting speed vc which should be the lowest and feed f which should be the lowest too.
W pracy przedstawiono wpływ parametrów skrawania (vc, f, m) na zużycie narzędzia (VBB) podczas wykończeniowego wgłębnego toczenia na twardo stali 18CrMo4 w stanie zahartowanym płytkami z regularnego azotku boru (CBN). Badania eksperymentalne prowadzono z uwzględnieniem metodyki Taguchi’ego. Analiza uzyskanych wyników badań była podstawą do wyznaczenia optymalnych wartości parametrów skrawania, dla przyjętego kryterium najmniejszego zużycia narzędzia. Wykonano również analizę wariancji ANOVA w celu określenia istotności wpływu poszczególnych parametrów skrawania na optymalizowane kryterium. Wyniki przeprowadzonych badań weryfikujących potwierdziły, że największy wpływ na zużycie narzędzia ma prędkość skrawania. Dlatego należy stosować najmniejsze wartości prędkości skrawania, również posuw powinien mieć wartość minimalną.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Application of a computer tool monitoring system in CNC machining centres
Autorzy:: Kolny, D.
Więcek, D.
Ziobro, P.
Krajčovič, M.
Tematy:: current process control
tool wear
monitoring system
process optimization
kontrola procesu
zużycie narzędzia
system monitorujący
optymalizacja procesu; Pokaż więcej
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Powiązania:: https://bibliotekanauki.pl/articles/117808.pdf Link otwiera się w nowym oknie
Opis:: The article presents practical knowledge about production process optimisation as a result of implementing a specialized system monitoring the work of machining tools. It features complex results of the conducted research with use of dedicated equipment and software, whose unconventional application may appear to be an effective IT tool for taking operational and strategic decisions in the machining area. This results from the possibility of analysing the obtained data in both current and long-term perspective, and taking decisions on this basis, which significantly conditions the rationality of using this type of solutions.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Material model and revealing the truth
Autorzy:: Czarnecki, L.
Sokołowska, J. J.
Tematy:: material model
analytical modelling
numerical modelling
modeling
computational tool
optimization
accuracy measurement
precision measurement
modelowanie analityczne
modelowanie numeryczne
modelowanie
narzędzie obliczeniowe
optymalizacja
dokładność pomiaru
precyzja pomiaru; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/202439.pdf Link otwiera się w nowym oknie
Opis:: The paper refers to the approach used in science, specifically in building materials engineering, assuming the possibility of material modeling, including modeling of the technical characteristics of building materials of various compositions as well as modeling phenomena/processes that occur during the use of materials and structures made from them. The authors analyze the merits of the approach of modeling in the context of compliance computational models to reality, consider the significance of the selection of the proper model (type of mathematical function, number of input data) which should be based on the knowledge of modeled material or phenomenon and later adequate verification of the model. The authors also underline importance of proper interpretation of results obtained by calculation. Misrepresentation may result in a misstated model of the studied phenomenon and lead to incorrect conclusions, which puts the researcher far from the truth, that he or she should always seek for.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Hydrology modelling in Taleghan mountainous watershed using SWAT
Modelowanie hydrologii górskiej zlewni rzeki Taleghan z zastosowaniem modelu SWAT
Autorzy:: Noor, H.
Vafakhah, M.
Taheriyoun, M.
Moghadasi, M.
Tematy:: auto-calibration
particle swarm optimization (PSO)
snow hydrology
soil and water assessment tool
Taleghan Dam
autokalibracja
hydrologia śniegu
optymalizacja rojem cząstek (PSO)
system oceny gleby i wody
zapora Taleghan; Pokaż więcej
Wydawca:: Instytut Technologiczno-Przyrodniczy
Powiązania:: https://bibliotekanauki.pl/articles/292853.pdf Link otwiera się w nowym oknie
Opis:: Mountainous regions in Iran are important sources of surface water supply and groundwater recharge. Therefore, accurate simulation of hydrologic processes in mountains at large scales is important for water resource management and for watershed management planning. Snow hydrology is the more important hydrologic process in mountainous watersheds. Therefore, streamflow simulation in mountainous watersheds is often challenging because of irregular topography and complex hydrological processes. In this study, the Soil and Water Assessment Tool (SWAT) was used to model daily runoff in the Taleghan mountainous watershed (800.5 km²) in west of Tehran, Iran. Most of the precipitation in the study area takes place as snow, therefore, modeling daily streamflow in this river is very complex and with large uncertainty. Model calibration was performed with Particle Swarm Optimization. The main input data for simulation of SWAT including Digital Elevation Model (DEM), land use, soil type and soil properties, and hydro-climatological data, were appropriately collected. Model performance was evaluated both visually and statistically where a good relation between observed and simulated discharge was found. The results showed that the coefficient of determination R² and the Nash-Sutcliffe coefficient NS values were 0.80 and 0.78, respectively. The calibrated model was most sensitive to snowmelt parameters and CN₂ (Curve Number). Results indicated that SWAT can provide reasonable predictions daily streamflow from Taleghan watersheds.
Górskie regiony Iranu są ważnymi terenami zasilania wód powierzchniowych i podziemnych. Z tego powodu dokładna symulacja procesów hydrologicznych w dużej skali ma znaczenie dla gospodarki zasobami wodnymi i planowania zarządzania zlewnią. Śnieg odgrywa ważną rolę w hydrologii górskich zlewni. Symulacja przepływów w tych zlewniach stanowi więc wyzwanie z powodu nieregularnej rzeźby terenu i skomplikowanych procesów hydrologicznych. W badaniach zastosowano system oceny gleby i wody (SWAT) do modelowania dobowego odpływu z górskiej zlewni Taleghan (800,5 km²) położonej w Iranie na zachód od Teheranu. Większość opadów na obszarze badań stanowi śnieg, dlatego modelowanie dobowego przepływu rzeki jest złożone i obarczone znacznym stopniem niepewności. Optymalizację modelu przeprowadzono metodą roju cząstek (PSO). Zebrano odpowiednie dane wejściowe do symulacji SWAT: cyfrowy model deniwelacji (DEM), dane o użytkowaniu gruntów, typie i właściwościach gleby oraz dane hydrologiczne i klimatyczne. Działanie modelu oceniano zarówno wizualnie, jak i statystycznie. W tym drugim przypadku stwierdzono ścisłą zależność między obserwowanym i symulowanym przepływem wody. Współczynniki determinacji R² i Nasha-Sutcliffa NS wynosiły odpowiednio 0,80 i 0,78. Wykalibrowany model był najbardziej wrażliwy na parametry topnienia śniegu i CN₂. Wyniki badań wykazały, że model SWAT może zapewnić wiarygodne prognozy dobowego przepływu wody w zlewni rzeki Taleghan.
Dostawca treści:: Biblioteka Nauki

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