| 61. |
- Adamson, Göran, et al.
(författare)
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Event-Driven Adaptability using IEC 61499 in Manufacturing Systems
- 2012
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Ingår i: Proceedings of The 5th International Swedish Production Symposium, SPS12. - Linköping : The Swedish Production Academy. - 9789175197524 ; , s. 453-460
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Konferensbidrag (refereegranskat)abstract
- Different kinds of uncertainty, such as variations in manufacturing capability and functionality, as well as changes in demand, make up a dynamically changing environment for many manufacturing systems of today. The ability to adapt to these unforeseen changes, through dynamic decision-making as well as dynamic control capabilities based on the use of real-time manufacturing information and intelligence, is vital to be able to perform at a competitive level while reducing unscheduled downtime. The event-driven Function Block (FB) model of the IEC 61499 standard, as opposed to the time-triggered and data-driven concept of IEC 61331, supports this approach, making it possible to handle, in a responsive and adaptive way, different kinds of uncertainty. Our objective is to develop methodologies for distributed, adaptive and dynamic process planning as well as machine monitoring and control for machining and assembly operations, using event-driven FBs. The implementation and testing of FB-based control for manufacturing equipment has been successfully realized in prototype systems, with control of both CNC machining and robotic assembly operations. The approach of using IEC 61499 FBs for adaptive control in other applications is also investigated, as an adaptive decision support system for operators at manufacturing facilities is under development. We strongly believe that IEC 61499 will play a major role in the shift to adaptive manufacturing systems.
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| 62. |
- Adamson, Göran, et al.
(författare)
-
Feature-Based Adaptive Manufacturing Equipment Control for Cloud Environments
- 2016
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Ingår i: Proceedings of the ASME 11th International Manufacturing Science and Engineering Conference, 2016, vol 2. - : American Society of Mechanical Engineers (ASME). - 9780791849903
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Konferensbidrag (refereegranskat)abstract
- The ideas of on-demand, scalable and pay-for-usage resource-sharing in Cloud Manufacturing are steadily attracting more interest. For implementing the concept of Manufacturing as-a-Service in a cloud environment, description models and implementation language for resources and their capabilities are required. A standardized approach for systemived virtualization, servisilisation, retrieval, selection and composition into higher levels of functionality is necessary. For the collaborative sharing and use of networked manufacturing resources there is also a need for a control approach for distributed manufacturing equipment. In this paper, the technological perspective for an adaptive cloud service-based control approach is described, and a supporting information model for its implementation. The control is realized through the use of a network of intelligent and distributable Function Block decision modules, enabling run-time manufacturing activities to be performed according to actual manufacturing conditions. The control system's integration to the cloud service management functionality is described, as well as a feature-level capability model and the use of ontologies and the Semantic Web.
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| 63. |
- Adamson, Göran, 1958-, et al.
(författare)
-
Feature-based control and information framework for adaptive and distributed manufacturing in cyber physical systems
- 2017
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Ingår i: Journal of manufacturing systems. - : Elsevier. - 0278-6125 .- 1878-6642. ; 43, s. 305-315
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Tidskriftsartikel (refereegranskat)abstract
- Modern distributed manufacturing within Industry 4.0, supported by Cyber Physical Systems (CPSs), offers many promising capabilities regarding effective and flexible manufacturing, but there remain many challenges which may hinder its exploitation fully. One major issue is how to automatically control manufacturing equipment, e.g. industrial robots and CNC-machines, in an adaptive and effective manner. For collaborative sharing and use of distributed and networked manufacturing resources, a coherent, standardised approach for systemised planning and control at different manufacturing system levels and locations is a paramount prerequisite.In this paper, the concept of feature-based manufacturing for adaptive equipment control and resource-task matching in distributed and collaborative CPS manufacturing environments is presented. The concept has a product perspective and builds on the combination of product manufacturing features and event-driven Function Blocks (FB) of the IEC 61499 standard. Distributed control is realised through the use of networked and smart FB decision modules, enabling the performance of collaborative run-time manufacturing activities according to actual manufacturing conditions. A feature-based information framework supporting the matching of manufacturing resources and tasks, as well as the feature-FB control concept, and a demonstration with a cyber-physical robot application, are presented.
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| 64. |
- Adamson, Göran, 1958-, et al.
(författare)
-
Feature-based Function Block Control Framework for Manufacturing Equipment in Cloud Environments
- 2018
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Ingår i: International Journal of Production Research. - : Taylor & Francis. - 0020-7543 .- 1366-588X. ; 57:12, s. 3954-3974
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Tidskriftsartikel (refereegranskat)abstract
- The ability to adaptively control manufacturing equipment in cloud environments is becoming increasingly more important. Industry 4.0, supported by Cyber Physical Systems and the concept of on-demand, scalable and pay-for-usage resource-sharing in cloud environments offers many promises regarding effective and flexible manufacturing. For implementing the concept of manufacturing services in a cloud environment, a cloud control approach for the sharing and control of networked manufacturing resources is required. This paper presents a cloud service-based control approach which has a product perspective and builds on the combination of event-driven IEC 61499 Function Blocks and product manufacturing features. Distributed control is realised through the use of a networked control structure of such Function Blocks as decision modules, enabling an adaptive run-time behaviour. The control approach has been developed and implemented as prototype systems for both local and distributed manufacturing scenarios, in both real and virtual applications. An application scenario is presented to demonstrate the applicability of the control approach. In this scenario, Assembly Feature-Function Blocks for adaptive control of robotic assembly tasks have been used.
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| 65. |
- Adamson, Göran, 1958-, et al.
(författare)
-
Function Block Approach for Adaptive Robotic Control in Virtual and Real Environments
- 2014
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Ingår i: Proceedings of the 14th Mechatronics Forum International Conference, Mechatronics 2014. - Karlstad : Karlstads universitet. - 9789170635649 ; , s. 473-479
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Konferensbidrag (refereegranskat)abstract
- Many manufacturing companies are facing an increasing amount of changes and uncertainty, caused by both internal and external factors. Frequently changing customer and market demands lead to variations in manufacturing quantities, product design and shorter product life-cycles, and variations in manufacturing capability and functionality contribute to a high level of uncertainty. The result is unpredictable manufacturing system performance, with an increased number of unforeseen events occurring in these systems. Such events are difficult for traditional planning and control systems to satisfactorily manage. For scenarios like these, with a dynamically changing manufacturing environment, adaptive decision making is crucial for successfully performing manufacturing operations. Relying on real-time information of manufacturing processes and operations, and their enabling resources, adaptive decision making can be realized with a control approach combining IEC 61499 event-driven Function Blocks (FBs) with manufacturing features. These FBs are small decision-making modules with embedded algorithms designed to generate the desired equipment control code. When dynamically triggered by event inputs, parameter values in their data inputs are forwarded to the appropriate algorithms, which generate new events and data output as control instructions. The data inputs also include monitored real-time information which allows the dynamic creation of equipment control code adapted to the actual run-time conditions on the shop-floor. Manufacturing features build on the concept that a manufacturing task can be broken down into a sequence of minor basic operations, in this research assembly features (AFs). These features define atomic assembly operations, and by combining and implementing these in the event-driven FB embedded algorithms, automatic code generation is possible. A test case with a virtual robot assembly cell is presented, demonstrating the functionality of the proposed control approach.
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| 66. |
- Adamson, Göran, et al.
(författare)
-
The state of the art of cloud manufacturing and future trends
- 2013
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Ingår i: ASME 2013 International Manufacturing Science and Engineering Conference Collocated with the 41st North American Manufacturing Research Conference, MSEC 2013. - : ASME - The American Society of Mechanical Engineers. - 9780791855461
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Konferensbidrag (refereegranskat)abstract
- Cloud manufacturing has emerged as a new manufacturing paradigm, which combines technologies (such as Internet of Things, Cloud computing, semantic Web, virtualisation and service-oriented technologies) with advanced manufacturing models, information and communication technologies. It aims to be networked, intelligent, service-oriented, knowledge-based and energy efficient, and promises a variety of benefits and advantages by providing fast, reliable and secure on-demand services for users. It is envisioned that companies in all sectors of manufacturing will be able to package their resources and know-hows in the Cloud, making them conveniently available for others through pay-as-you-go, which is also timely and economically attractive. Resources, e.g. manufacturing software tools, applications, knowledge and fabrication capabilities, will then be made accessible to presumptive consumers on a worldwide basis. After surveying a vast array of available publications, this paper presents an up-to-date literature review together with future trends and research directions in Cloud manufacturing.
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| 67. |
- Adattil, Ruksana, et al.
(författare)
-
Assessing the Psychosocial Impacts of Industry 4.0 Technologies Adoption in the Operator 4.0 : Literature Review & Theoretical Framework
- 2024
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Ingår i: International Journal of Industrial Engineering and Management. - : University of Novi Sad, Faculty of Technical Sciences. - 2217-2661 .- 2683-345X. ; 15:1, s. 59-80
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Forskningsöversikt (refereegranskat)abstract
- Emerging digital and smart technologies, including wearable and collaborative ones, related to the Industry 4.0 paradigm are playing an assisting, collaborative, and augmenting role for the Operator 4.0, and just as in previous industrial revolutions, the nature of work and the workplace for operators on the shop floor is changing. This literature review aims to look into the impact of digital and smart technologies adoption on the workers’ psychosocial stage under the light of the Operator 4.0 typology. Based on the review conducted, a theoretical framework for assessing the psychosocial impacts (risks) of Industry 4.0 technologies adoption in Operator 4.0 is proposed. The framework can be utilized by company managers, researchers, production engineers, and human resources personnel for carrying out a psychosocial risk assessment of Operator 4.0 in assembly, maintenance, and training operations as these operations get digitally transformed and smartified based on self-report questionnaires. Findings reveal that the nature of work, the social and organizational environment of work, and related individual factors are key categories that might affect the Operator 4.0 psychosocial stage on the shop floor.
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| 68. |
- Addelyan Rasi, Hamideh, et al.
(författare)
-
Can a psychosocial intervention programme teaching coping strategies improve the quality of life of Iranian women? : A non-randomised quasi-experimental study
- 2013
-
Ingår i: BMJ Open. - : BMJ Publishing Group. - 2044-6055. ; 3:3
-
Tidskriftsartikel (refereegranskat)abstract
- Objectives: To assess whether a psychosocial intervention teaching coping strategies to women can improve quality of life (QOL) in groups of Iranian women exposed to social pressures. Design: Quasi-experimental non-randomised group design involving two categories of Iranian women, each category represented by non-equivalent intervention and comparison groups. Setting: A large urban area in Iran. Participants: 44 women; 25 single mothers and 19 newly married women. Interventions: Seventh-month psychosocial intervention aimed at providing coping strategies. Primary outcome measures: Effect sizes in four specific health-related domains and two overall perceptions of QOL and health measured by the WHOQOL-BREF instrument. Results: Large effect sizes were observed among the women exposed to the intervention in the WHOQOLBREF subdomains measuring physical health (r=0.68; p<0.001), psychological health (r=0.72; p<0.001), social relationships (r=0.52; p<0.01), environmental health (r=0.55; p<0.01) and in the overall perception of QOL (r=0.72; p<0.001); the effect size regarding overall perception of health was between small and medium (r=0.20; not significant). Small and not statistically significant effect sizes were observed in the women provided with traditional social welfare services. Conclusions: Teaching coping strategies can improve the QOL of women in societies where gender discrimination is prevalent. The findings require reproduction in studies with a more rigorous design before the intervention model can be recommended for widespread distribution.
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| 69. |
- Adell, Johan, 1980, et al.
(författare)
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Thermal diffusion of Mn through GaAs overlayers on (Ga, Mn)As
- 2011
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Ingår i: Journal of Physics. - : Institute of Physics Publishing (IOPP). - 0953-8984 .- 1361-648X. ; 23:8
-
Tidskriftsartikel (refereegranskat)abstract
- Thermally stimulated diffusion of Mn through thin layers of GaAs has been studied by x-ray photoemission. (Ga, Mn)As samples with 5 at% Mn were capped with 4, 6 and 8 monolayer (ML) GaAs, and Mn diffusing through the GaAs was trapped on the surface by means of amorphous As. It was found that the out-diffusion is completely suppressed for an 8 ML thick GaAs film. The short diffusion length is attributed to an electrostatic barrier formed at the (Ga, Mn)As/GaAs interface.
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| 70. |
- Adisa, Femi, et al.
(författare)
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The mediating role of absorptive capacity in knowledge transfer : ERP implementations in small and medium sized enterprises in sub-Saharan Africa
- 2013
-
Ingår i: International Journal of Enterprise Information Systems. - : IGI Global. - 1548-1115 .- 1548-1123. ; 9:2, s. 1-19
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Tidskriftsartikel (refereegranskat)abstract
- Knowledge transfer between consultants and organizational users influences the outcomes of an Enterprise Resource System (ERP) implementation. Configuration and implementation tasks are dependent on generating some level of shared understanding of both business practices and technology. These problems become acute in implementations in small and medium sized enterprises (SMEs). SMEs often operate with non-standard business processes, making an effective interchange of process knowledge between consultants and end-users crucial. Using a multiple case study method and content analysis, the authors investigate the mediating role of absorptive capacity in knowledge transfer in SMEs ERP implementations. They present exploratory case studies from 3 Nigerian companies with varying outcomes, and hypothesize that knowledge transfer is complicated by acute information asymmetry, absence of pre-existing related knowledge and consequent difficulties in developing a shared understanding, and by a tendency to operate with lone consultants and lone organizational representatives.
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