1,477 research outputs found
Pristup specifikaciji i generisanju proizvodnih procesa zasnovan na inženjerstvu vođenom modelima
In this thesis, we present an approach to the production process specification and generation based on the model-driven paradigm, with the goal to increase the flexibility of factories and respond to the challenges that emerged in the era of Industry 4.0 more efficiently. To formally specify production processes and their variations in the Industry 4.0 environment, we created a novel domain-specific modeling language, whose models are machine-readable. The created language can be used to model production processes that can be independent of any production system, enabling process models to be used in different production systems, and process models used for the specific production system. To automatically transform production process models dependent on the specific production system into instructions that are to be executed by production system resources, we created an instruction generator. Also, we created generators for different manufacturing documentation, which automatically transform production process models into manufacturing documents of different types. The proposed approach, domain-specific modeling language, and software solution contribute to introducing factories into the digital transformation process. As factories must rapidly adapt to new products and their variations in the era of Industry 4.0, production must be dynamically led and instructions must be automatically sent to factory resources, depending on products that are to be created on the shop floor. The proposed approach contributes to the creation of such a dynamic environment in contemporary factories, as it allows to automatically generate instructions from process models and send them to resources for execution. Additionally, as there are numerous different products and their variations, keeping the required manufacturing documentation up to date becomes challenging, which can be done automatically by using the proposed approach and thus significantly lower process designers' time.У овој дисертацији представљен је приступ спецификацији и генерисању производних процеса заснован на инжењерству вођеном моделима, у циљу повећања флексибилности постројења у фабрикама и ефикаснијег разрешавања изазова који се појављују у ери Индустрије 4.0. За потребе формалне спецификације производних процеса и њихових варијација у амбијенту Индустрије 4.0, креиран је нови наменски језик, чије моделе рачунар може да обради на аутоматизован начин. Креирани језик има могућност моделовања производних процеса који могу бити независни од производних система и тиме употребљени у различитим постројењима или фабрикама, али и производних процеса који су специфични за одређени систем. Како би моделе производних процеса зависних од конкретног производног система било могуће на аутоматизован начин трансформисати у инструкције које ресурси производног система извршавају, креиран је генератор инструкција. Такође су креирани и генератори техничке документације, који на аутоматизован начин трансформишу моделе производних процеса у документе различитих типова. Употребом предложеног приступа, наменског језика и софтверског решења доприноси се увођењу фабрика у процес дигиталне трансформације. Како фабрике у ери Индустрије 4.0 морају брзо да се прилагоде новим производима и њиховим варијацијама, неопходно је динамички водити производњу и на аутоматизован начин слати инструкције ресурсима у фабрици, у зависности од производа који се креирају у конкретном постројењу. Тиме што је у предложеном приступу могуће из модела процеса аутоматизовано генерисати инструкције и послати их ресурсима, доприноси се креирању једног динамичког окружења у савременим фабрикама. Додатно, услед великог броја различитих производа и њихових варијација, постаје изазовно одржавати неопходну техничку документацију, што је у предложеном приступу могуће урадити на аутоматизован начин и тиме значајно уштедети време пројектаната процеса.U ovoj disertaciji predstavljen je pristup specifikaciji i generisanju proizvodnih procesa zasnovan na inženjerstvu vođenom modelima, u cilju povećanja fleksibilnosti postrojenja u fabrikama i efikasnijeg razrešavanja izazova koji se pojavljuju u eri Industrije 4.0. Za potrebe formalne specifikacije proizvodnih procesa i njihovih varijacija u ambijentu Industrije 4.0, kreiran je novi namenski jezik, čije modele računar može da obradi na automatizovan način. Kreirani jezik ima mogućnost modelovanja proizvodnih procesa koji mogu biti nezavisni od proizvodnih sistema i time upotrebljeni u različitim postrojenjima ili fabrikama, ali i proizvodnih procesa koji su specifični za određeni sistem. Kako bi modele proizvodnih procesa zavisnih od konkretnog proizvodnog sistema bilo moguće na automatizovan način transformisati u instrukcije koje resursi proizvodnog sistema izvršavaju, kreiran je generator instrukcija. Takođe su kreirani i generatori tehničke dokumentacije, koji na automatizovan način transformišu modele proizvodnih procesa u dokumente različitih tipova. Upotrebom predloženog pristupa, namenskog jezika i softverskog rešenja doprinosi se uvođenju fabrika u proces digitalne transformacije. Kako fabrike u eri Industrije 4.0 moraju brzo da se prilagode novim proizvodima i njihovim varijacijama, neophodno je dinamički voditi proizvodnju i na automatizovan način slati instrukcije resursima u fabrici, u zavisnosti od proizvoda koji se kreiraju u konkretnom postrojenju. Time što je u predloženom pristupu moguće iz modela procesa automatizovano generisati instrukcije i poslati ih resursima, doprinosi se kreiranju jednog dinamičkog okruženja u savremenim fabrikama. Dodatno, usled velikog broja različitih proizvoda i njihovih varijacija, postaje izazovno održavati neophodnu tehničku dokumentaciju, što je u predloženom pristupu moguće uraditi na automatizovan način i time značajno uštedeti vreme projektanata procesa
Interoperability framework of virtual factory and business innovation
Interoperability framework of virtual factory and business innovationTask T51 Design a common schema and schema evolution framework for supporting interoperabilityTask T52 Design interoperability framework for supporting datainformation transformation service composition and business process cooperation among partnersA draft version is envisioned for month 44 which will be updated to reflect incremental changes driven by the other working packages for month 72 deliverable 7.
Structuring and Provision of Manufacturing knowledge through the Manufacturing Resource Ontology
One challenge in manufacturing-integrated product development is the accessibility of the required manufacturing knowledge. Here, ontologies offer the possibility to structure and formalize information in the form of a knowledge base in order to act as a generic interface to the manufacturing and design specific systems. This paper describes the development of a generic knowledge base called MARON (MAnufacturing Restriction ONtology) for the structured representation of manufacturing restrictions via formalized manufacturing capabilities. Using the example of an expert system for process element-oriented manufacturability analysis, it is shown how MARON contributes to automated decision support in the context of manufacturing-oriented design
Wissensbasierte Entwurfsbewertung der Produktgestalt mittels Multi-Agentensystemen
Beim Gestalten legen die Konstruierenden eine Vielzahl der Produkteigenschaften fest, welche Einfluss auf den gesamten Produktlebenszyklus haben. Daher verlangt ein moderner Produktentwicklungsprozess, dass ein Produkt nicht nur aufgrund seiner Funktionserfüllung optimiert wird, sondern auch vor dem Hintergrund des Design for X (DfX), welches die Berücksichtigung von Anforderungen aus dem gesamten Produktlebenszyklus beinhaltet. Die zunehmende Komplexität in der Produktentwicklung und der fehlende Wissensaustausch, beispielsweise zwischen der Entwicklung und Fertigung, führen zu unnötigen Iterationsschleifen und hohen Kosten.
Im Rahmen dieser Arbeit wird eine wissensbasierte Entwurfsbewertung der Produktgestalt mittels Multi-Agentensystemen vorgestellt, um den Konstruierenden ein digitales Assistenzsystem zur Überprüfung von CAD-Modellen hinsichtlich der DfX-Anforderungen zur Verfügung zu stellen. Hierzu werden, zum einen für die Repräsentation des domänenspezifischen Wissens wissensbasierte Entwicklungs- und Konstruktionssysteme untersucht und zum anderen für die Durchführung von dezentralen Schlussfolgerungsmechanismen und Verhandlungen das Multi-Agentensystem vorgestellt. Das methodische Vorgehen MaSE4D zur Entwicklung von Multi-Agentensystemen ermöglicht, ausgehend vom initialen Systemkontext, eine strukturierte Zusammensetzung der dezentral verteilten Wissensquellen, um eine ganzheitliche Bewertung in der Domäne der Produktgestaltung vorzunehmen. Durch einen generalisierten Aufbau einer Software-Architektur ist es zudem möglich ein 3D-Modell in einer CAD-Entwicklungsumgebung, mittels graphenbasierter Featureerkennung, zu analysieren und automatisiert anzupassen. Des Weiteren werden Templates für die Programmierung von Agenten zur Verfügung gestellt, welche die dezentrale Wissensverwaltung, die Kommunikation unter den Agenten sowie deren Verwaltung im Kontext der Produktgestaltung unterstützen.
Die Anwendbarkeit und Validierung des methodischen Vorgehens und der Entwicklungsumgebung für das Multi-Agentensystem erfolgt durch die Bewertung von zehn unterschiedlichen Frästeilentwürfen.During the design process, the designers determine numerous product properties that have an influence on the entire product life cycle. Therefore, a modern product development process requires that a product is not only optimized based on its functional fulfillment but also regarding Design for X, which includes the consideration of requirements from the entire product life cycle. The increasing complexity in product development and the lack of knowledge exchange between development and manufacturing lead to iteration loops and higher costs.
In the context of this work, a knowledge-based evaluation of embodiment design using multi-agent systems is presented to provide designers with a digital assistance system for the verification of CAD models regarding Design for X. For this purpose, knowledge-based engineering systems are investigated for the representation of domain-specific knowledge on the one hand. On the other hand, multi-agent systems are introduced for the execution of decentralized reasoning mechanisms and negotiations. The methodological approach MaSE4D for the development of multi-agent systems allows, starting from the initial system context, a structured composition of the decentralized distributed knowledge sources to perform a holistic evaluation in the domain of product design. A generalized software architecture allows analyzing and automatically adapting a 3D model in a CAD development environment using graph-based feature recognition. Furthermore, templates for programming agents are provided, which support decentralized knowledge management, communication among agents, as well as their management in the context of product design.
The applicability and validation of the multi-agent system's methodological approach and development environment is performed by evaluating ten different milling designs
DesignChain: Process Automation From Recording Of Customer Requirements To Production Release
Growing price pressure due to an increasing number of global suppliers, increasing individualization of products and ever-shorter development cycles are challenges facing the engineering industry. In this context, mass personalization represents the customized production of customer products with batch size one at the low unit costs of mass production.
The possibilities of digitalization and automation of technical order processing open up the opportunity for companies to significantly reduce their complexity costs and lead times and thus increase their competitiveness. Many companies already use a range of simulation tools and configuration solutions but only as stand-alones. Often, the expert knowledge of employees is hidden in "knowledge silos" and is rarely networked across processes.
The concept "DesignChain" will address these challenges by automating and digitalizing technical process planning from recording customer requirements to releasing a product to the shop floor. Configurators within DesignChain allow for mapping variant-rich products. This transformation of customer requirements into product properties makes it possible to generate even complex CAD models, such as models for large-scale equipment based on specific rules. An automated CAx chain will help to digitally transfer production-relevant documents to the shop floor for parts fabrication. This process, which can be fully automated, allows for the customized creation of variants based on current approval statuses
General Course Catalog [2022/23 academic year]
General Course Catalog, 2022/23 academic yearhttps://repository.stcloudstate.edu/undergencat/1134/thumbnail.jp
Tidal Energy and Coastal Models: Improved Turbine Simulation
Marine renewable energy is a continually growing topic of both commercial and academic research sectors. While not as developed as other renewable technologies such as those deployed within the wind sector, there is substantial technological crossover coupled with the inherent high energy density of water, that has helped push marine renewables into the wider renewable agenda. Thus, an ever expanding range of projects are in various stages of development.As with all technological developments, there are a range of factors that can con-tribute to the rate of development or eventual success. One of the main difficulties, when looking at marine renewable technologies in a comparative view to other en-ergy generation technologies, is that the operational environment is physically more complex: Energy must be supplied in diverse physical conditions, that temporally fluctuate with a range of time scales. The constant questions to the iteration to the local ecology. The increased operational fatigue of deployed devices. The financial risk associated within a recent sector.This work presents the continual research related to the computational research development of different marine renewable technologies that were under develop-ment of several institutional bodies at the time of writing this document.The scope has a wide envelopment as the nature of novel projects means that the project failure rate is high. Thus, forced through a combination of reasons related to financial, useful purpose and intellectual property, the research covers distinct projects
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