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Conceptualization anddevelopment of a standardizedframework for virtualcommissioning of modularassembly control systems
KTH, School of Industrial Engineering and Management (ITM).
2019 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Today’s industries are challenged by an ongoing trend of more product variantsto meet differing customer needs. This leads to efficiency losses within traditionalproduction systems using fixed cycle times within an assembly line. Contrarily,flexible modular assembly systems are seen as a promising solution. These are characterizedby offering flexible routes of the products throughout the production system.Utilizing the capabilities of cyber-physical production systems, automated guidedvehicles are performing the transports of workpiece-carriers in-between decoupledworkstations. In order to manage the complexity, sophisticated control approachesare required to coordinate all involved entities. These are organized either in acentralized or decentralized manner. For the performance evaluation of both types ofalgorithms concerning parameters characterizing the factory layout, no standardizedframework exists.

Following the principles of virtual commissioning, this work presents a frameworkcomposed of three elements: a flexible simulation model representing a modularassembly system, a multi-agent system incorporating the logic of centralized ordecentralized control approaches, and an interface for data exchange.The framework has been successfully validated by incorporating a centralized approachfollowing a global schedule and a decentralized approach using a negotiationbasedagent-system which controls the production flow.

Abstract [sv]

Dagens industrier utmanas av en pågående trend där fler produktvarianter uppstårför att tillgodose kundernas behov. Detta leder till effektivitetsförluster inom traditionellaproduktionssystem med fasta cykeltider inom en monteringslinje. Däremotses flexibla modulmonteringssystem som en lovande lösning. Dessa kännetecknasav att erbjuda flexibla vägar för produkterna genom hela produktionssystemet. Medhjälp av funktionerna hos Cyber-fysiska produktionssystem utför automatiskt guidadefordon (AGV) transporter mellan frikopplade arbetsstationer. För att hanterakomplexiteten krävs sofistikerade kontrollmetoder för att samordna alla inblandadeentiteter. Dessa är organiserade antingen på ett centraliserat eller decentraliseratsätt. För prestationsutvärdering av de båda typerna av algoritmer med avseendepå parametrar som karaktäriserar fabrikslayouten, existerar det tillfälligtvis ingetstandardiserad ramverk.

Enligt principerna för virtuell idrifttagning presenterar detta arbete ett ramverk sombestår av tre delar: en flexibel simuleringsmodell som representerar ett modulmonteringssystem,ett multi-agent system som innehåller logiken i centraliserade ellerdecentraliserade kontrollmetoder samt ett gränssnitt för datautbyte.Ramverket har framgångsrikt validerats genom att jämföra ett centraliserat tillvägagångssättsom följer ett globalt schema samt ett decentraliserat tillvägagångssättsom med hjälp av ett förhandlingsbaserat agent-system kontrollerar produktionsflödet.

Place, publisher, year, edition, pages
2019. , p. 94
Series
TRITA-ITM-EX ; 2019:680
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-264567OAI: oai:DiVA.org:kth-264567DiVA, id: diva2:1374258
External cooperation
Audi AG
Supervisors
Examiners
Available from: 2019-11-29 Created: 2019-11-29 Last updated: 2019-11-29Bibliographically approved

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CiteExportLink to record
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