500 research outputs found
Design and implementation of a function block-based holonic control architecture for a new generation flexible manufacturing system
In this research work a control architecture which gives response to the
requirements of new generation of flexible manufacturing systems in terms
of flexibility, reconfigurability, robustness and autonomy is designed and
implemented. To do so the main principles of the Holonic Manufacturing
paradigm are applied using the IEC61499 function block (FB) technology.
Unlike other similar research proposals, in this work FBs are not relegated
to low-level control but are used to model manufacturing execution and
control high-level control tasks. This is done with the objective of
evaluating the viability of using FBs to develop holonic architectures in
comparison to more established technologies like multi-agent systems.
Moreover, the proposed control architecture also focuses on better
integrating and exploiting the products’ information to enhance its
flexibility and adaptability. For this STEP-NC (ISO14649) is used to model
richer process plans which include manufacturing alternatives and could be
easily integrated in the control itself
Status and Future of Manufacturing Execution Systems
This paper proposes a taxonomy for characterizing manufacturing execution systems and discusses how they can benefit from the recent Developments of Industry 4.0. The study is based on a literature review. The taxonomy contributes to theory and practice by providing a framework for benchmarking of manufacturing execution systems. The taxonomy can be utilized in the selection or design process of the manufacturing execution systems. Outlining the further opportunities provided by Industry 4.0 technologies, the paper also provides directions for future improvements of manufacturing execution systems.acceptedVersio
Status and Future of Manufacturing Execution Systems
This paper proposes a taxonomy for characterizing manufacturing execution systems and discusses how they can benefit from the recent Developments of Industry 4.0. The study is based on a literature review. The taxonomy contributes to theory and practice by providing a framework for benchmarking of manufacturing execution systems. The taxonomy can be utilized in the selection or design process of the manufacturing execution systems. Outlining the further opportunities provided by Industry 4.0 technologies, the paper also provides directions for future improvements of manufacturing execution systems.acceptedVersio
Intelligent Control of Renewable Holonic Energy Systems
International audienceSignificant sources of energy production, of nuclear or fossil fuel type, which can assume all the needs of a country or region, are more strongly contested, either due to accidents of natural origin or following the observation of the dangerousness of the human effect on the global climate balance. Thus governments are encouraging the development of green energy. Any centralized control approach will be obsolete regarding, on one hand, the powers concerned and on another hand, the wide dispersion of these production sources: an irreversible movement to locally produce what is locally consumed is being developed. A decentralized control, based on intelligent entities, is presented. The holonic paradigm is used to represent a Holonic Energy Systems (HES) with multi-sources and multi- users. The several possible switching between the various energy sources are obtained by using a multicriteria decision aid method
A HOLISTIC APPROACH TO COMPUTER INTEGRATED MANUFACTURING ARCHITECTURE AND SYSTEMS DESIGN
This work addresses the problem of finding an improved solution to Computer
Integrated Manufacturing (ClM) Architecture and Systems Design. The current
approaches are shown to be difficult to understand and use, over complex. In
spite of their complexity of approach they lack comprehensiveness and omit many
factors and dimensions considered essential for success in today's competitive
and often global market place.
A new approach to ClM Architecture and Systems Design is presented which
offers a simpler, more flexible and more robust format for defining a particular ClM
System within a general architectural framework. At the same time this new
approach is designed to offer a comprehensive and holistic solution.
The research work involved the investigation of current approaches and research
and development initiatives focusing particularly on the CIM-OSA and GRAI
Integrated methodologies in the field of ClM Architecture. The strengths and
weaknesses of the various approaches are examined. Developments in other
related fields including manufacturing systems, manufacturing management,
information technology and systems generally have been investigated regarding
their relevance and possible contribution to an improved solution.
The author has built on his practical experience in creating, designing and
managing the implementation of a global CIM system. The authors work on
several publicly funded collaborative research and development projects relevant
to the problem area is described. These include CIM-OSA, IMOCIM and TIQS
projects. In the latter two projects the author was instrumental in developing the
methodological approach based on a systems approach to business processes in
connection with the design of quality and manufacturing systems. Both of these
projects have contributed to this work. The author has also participated in the
global IMS programme as a rapporteur for the European Commission and this
helped to provide a global perspective on the problems of manufacturing
companies as they attempt to compete in a world wide market place.
The results of this work provide the basis for a radically improved approach to
ClM Architecture and Systems Design based on the holistic view of an enterprise.
The approach developed supports the business process view of an enterprise;
addresses the people and organisational aspects; leads to ClM solutions focused
on meeting enterprise goals; and is able to deal with a significantly increased
scope and complexity compared with existing methods yet is easily understood
and more simple to simple to apply than current approaches
An agile and adaptive holonic architecture for manufacturing control
Tese de doutoramento. Engenharia Electrotécnica e de Computadores. 2004. Faculdade de Engenharia. Universidade do Port
Customising with 3D printing: The role of intelligent control
© 2018 Elsevier B.V. The emergence of direct digital manufacturing creates new opportunities for the production of highly customised goods especially when it is combined with conventional manufacturing methods. Nevertheless, this combination creates a need for systems that can effectively manage and control the resulting distributed manufacturing process. In this paper, we explore three different configurations that can enable direct digital manufacturing for customisation, ranging from fully integrated to inter-organisational set up. Additionally, control requirements of such systems are developed and the suitability of intelligent control is explored. By ‘intelligent control’ we mean production control that is capable of assessing and interacting with the production environment and adapting production accordingly. We argue that the so called intelligent product paradigm provides a suitable mechanism for the development of such intelligent control systems. In this approach, the intelligent product directly co-ordinates with design agent, 3D printing agents and other conventional manufacturing system agents to schedule, assign and execute tasks independently. Via a case example of a realistic production system, we propose and implement such an intelligent control system and we analyse its feasibility in supporting 3D printing enabled customisation
A reference model for information specification for metalworking SMEs
The work reported in this thesis offers a novel basis for the realisation of specifications for
information requirements to meet the distinct operational requirements of metalworking
SMEs. This has been achieved through the development of a reference SME enterprise
model based on fundamental ideas of the holon and fractal factory concepts. The novel
concept of a node holon is introduced, which allows the representation of the human
dominated interactions in a company based on the fundamental concepts of the holon. This
offers a competitive alternative to the methods for enterprise modelling and information
specification which are based solely around business processes and procedural rules.
A new representation for the organisation of the SME has been based on identifying the
major zones of activity within the enterprise, which is seen to provide a more appropriate
representation for companies whose basis for operation is informally structured. Two
classes of zones have been identified, these are the business support zone and
manufacturing zone. The relationship between a top down description of the enterprise as
zones and the complementary bottoms up modelling of the enterprise based on concepts of
the node holon are described in detail.
A critical study of two candidate modelling architectures, namely CIN40SA and ARIS will
show the applicability of the individual architectures for the task information specification.
The constituents of the SMEE enterprise reference model is placed within the context of
contemporary enterprise modelling practice by mapping against one of the architectures.
This will demonstrate how the architectures can readily accommodate new modelling
approaches whilst retaining their major advantages, thereby increasing their applicability
and potential uptake.
The reference SME enterprise model has been readily applied in the study of an SME,
where a representation of the company has been achieved solely on the current organisation
of its business support and manufacturing activities. The holonic aspects of the enterprise
have also been successfully modelled. This process is supported by a CASE tool which has
it constructs underpinned by the reference SME enterprise model
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