The Experts below are selected from a list of 85641 Experts worldwide ranked by ideXlab platform
Armando Walter Colombo - One of the best experts on this subject based on the ideXlab platform.
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Monitoring of Flexible Production systems using high-level Petri net specifications
Control Engineering Practice, 1999Co-Authors: Klaus Feldmann, Armando Walter ColomboAbstract:Abstract The degree of reliability in the operation of Flexible Production systems depends not only on the operation of the individual components, but also on the structure and evolution of the embedded supervisory control system. Monitoring of operations and of the behaviour of the components and of the system as a whole is an essential function of such a supervisory control system. This paper focuses on the development and implementation of feature- and model-based monitoring methods using high-level Petri net specifications of Flexible Production systems and of the embedded discrete-event controllers. The combination of machine–human interface concepts with the developed monitoring methods leads to a user-friendly representation of monitoring information. An application at industrial level is shown by means of a case study, i.e., a sample Flexible assembly cell, situated at the Institute for Manufacturing Automation and Production Systems, Germany.
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A temporised Petri net approach for design, modelling and analysis of Flexible Production systems
The International Journal of Advanced Manufacturing Technology, 1997Co-Authors: Armando Walter Colombo, Ricardo Carelli, Benjamin KuchenAbstract:The aim of this work is to present an approach, which allows the reProduction of a Flexible Production system behaviour during Production operations and gives feedback about its efficiency, in order to validate the system's specifications. The modelling and analysis of Flexible Production systems are investigated for both functional and performance objectives. The paper focuses particularly on the modelling and analysis of Production systems using a new proposed temporised Petri net tool and demonstrates how the model obtained suits the tasks well by producing a higher accuracy system description. An analysis methodology based on both structural and reachability-like approaches, is also presented to derive the behaviour characteristics of the modelled systems in terms of their functionality and performance. From validation data analysis the user can obtain useful suggestions regarding layout configuration and strategies of resource management and can be guided throughout the whole Production system design phase. An application example is given.
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A multiagent-based distributed control platform for industrial Flexible Production systems
IECON'01. 27th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.37243), 1Co-Authors: Ronald Schoop, R. Neubert, Armando Walter ColomboAbstract:The tendency of recent Production technologies towards both batches of small/medium size and part families of increasing variety often comes into conflict with the demand for high productivity, i.e. Production-time minimization and simultaneous improvement of machine utilization. Flexible Production systems possess the ability to attain efficiency and versatility by producing a wide range of different product families with minimal effort in changing the involved manufacturing environment. Nevertheless, the Production system's flexibility and degree of reliability depend fundamentally on the flexibility and reliability of the embedded control system. This paper reports on the design and realization of a multi-agent-based distributed control system for Flexible Production systems, which covers both conventional control equipment as well as embedded control agents. The agent components are implemented as Windows NT services and logic control programs interfaced via DCOM and an Ethernet. The results of the application in an industrial Flexible Production system are used to show the effectiveness of the proposed approach.
Dominique Bonvin - One of the best experts on this subject based on the ideXlab platform.
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A Systemic Framework for the Recovery of Flexible Production Systems
International Journal of Production Research, 1996Co-Authors: Emmanuel D. Adamides, E.c. Yamalidou, Dominique BonvinAbstract:In this paper, the real-time failure-recovery of Flexible Production systems is considered. Initially, the problem is structured and formulated within a systemic framework, and then, a generic local-in-time, schedule-repair approach is proposed. The coloured timed Petri net formalism is used to represent, in a modular and compact way, the Production system's discrete-event dynamics. In connection with this, an intelligent opportunistic recovery technique has been developed for obtaining, in real time, the recovery trajectory which conforms best to a chosen Production strategy. The application of the approach is demonstrated by considering recovery cases in a batch-processing chemicals plant.
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Intelligent Error Recovery in Flexible Production Systems
1994Co-Authors: Emmanuel D. Adamides, E.c. Yamalidou, Dominique BonvinAbstract:Real time failure recovery planning in Flexible Production systems is considered at the process level. Initially, the problem is structured and formulated within a systemic framework, and then, a generic roll-forward recovery approach that uses the process’s dynamic model, as well as general Production knowledge, is proposed. The Colored Timed Petri Net formalism is used to represent, in a modular and compact way, the process discrete-event dynamics. In connection with this, an intelligent opportunistic recovery technique for finding, in real time, the recovery trajectory that conforms best within a specific operational strategy, is proposed. The application of the approach is demonstrated by considering cases taken from the chemicals batch-processing industry.
Emmanuel D. Adamides - One of the best experts on this subject based on the ideXlab platform.
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A Systemic Framework for the Recovery of Flexible Production Systems
International Journal of Production Research, 1996Co-Authors: Emmanuel D. Adamides, E.c. Yamalidou, Dominique BonvinAbstract:In this paper, the real-time failure-recovery of Flexible Production systems is considered. Initially, the problem is structured and formulated within a systemic framework, and then, a generic local-in-time, schedule-repair approach is proposed. The coloured timed Petri net formalism is used to represent, in a modular and compact way, the Production system's discrete-event dynamics. In connection with this, an intelligent opportunistic recovery technique has been developed for obtaining, in real time, the recovery trajectory which conforms best to a chosen Production strategy. The application of the approach is demonstrated by considering recovery cases in a batch-processing chemicals plant.
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Intelligent Error Recovery in Flexible Production Systems
1994Co-Authors: Emmanuel D. Adamides, E.c. Yamalidou, Dominique BonvinAbstract:Real time failure recovery planning in Flexible Production systems is considered at the process level. Initially, the problem is structured and formulated within a systemic framework, and then, a generic roll-forward recovery approach that uses the process’s dynamic model, as well as general Production knowledge, is proposed. The Colored Timed Petri Net formalism is used to represent, in a modular and compact way, the process discrete-event dynamics. In connection with this, an intelligent opportunistic recovery technique for finding, in real time, the recovery trajectory that conforms best within a specific operational strategy, is proposed. The application of the approach is demonstrated by considering cases taken from the chemicals batch-processing industry.
J. Uhl - One of the best experts on this subject based on the ideXlab platform.
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The ALSYS adaptable control system for Flexible Production
Control Engineering Practice, 1995Co-Authors: G. Pritschow, J. UhlAbstract:Abstract In Production automation today, tailored Production control systems are mainly used, mostly with an unfavourable cost-efficiency ratio. Reusable software solutions which are adaptable to the respective application and its degree of automation are for the most part unknown. This paper is concerned with the definition of Production control systems (PCS) and their application in Flexible Production systems (FPS). Reusability is of particular importance in the description of the software structures of PCS.
Peter M Kort - One of the best experts on this subject based on the ideXlab platform.
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dedicated vs product Flexible Production technology strategic capacity investment choice
European Journal of Operational Research, 2015Co-Authors: Hendrika Jobina Boonman, Verena Hagspiel, Peter M KortAbstract:This paper studies the optimal investment strategies of an incumbent and a potential entrant that can both choose between a product Flexible and dedicated technology, in a two-product market characterized by uncertain demand. The product Flexible Production technology has certain advantages, especially when the economic environment is uncertain. On the other hand, the dedicated Production technology allows a firm to commit to Production quantities. This gives strategic advantages, which can outweigh the ‘value of flexibility’. It turns out that both firms prefer, for some scenarios, the dedicated Production technology. However, we find that in a game with sequential technology choices, both firms investing dedicated, will not be an equilibrium. Especially when the economic environment is more uncertain, the incumbent overinvests in product Flexible capacity to force the entrant to choose the dedicated technology. Then, the incumbent is the only firm with the product Flexible Production technology, which results in a high payoff.
