| 1. |
- Alzghoul, Ahmad, et al.
(författare)
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Data stream mining for increased functional product availability awareness
- 2011
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Ingår i: Functional Thinking for Value Creation. - Berlin, Heidelberg : Springer Berlin/Heidelberg. - 9783642196881 - 9783642196898 ; , s. 237-241
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Konferensbidrag (refereegranskat)abstract
- Functional Products (FP) and Product Service Systems (PSS) may be seen as integrated systems comprising hardware and support services. For such offerings, availability is key. Little research has been done on integrating Data Stream Management Systems (DSMS) for monitoring (parts of) a FP to improve system availability. This paper introduces an approach for how data stream mining may be applied to monitor hardware being part of a Functional Product. The result shows that DSMS have the potential to significantly support continuous availability awareness of industrial systems, especially important when the supplier is to supply a function with certain availability.
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| 2. |
- Karlberg, Magnus, et al.
(författare)
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Dynamics of rotor systems with clearance and weak pedestals in full contact
- 2010
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Ingår i: 13th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery 2010 (ISROMAC-13). - Red Hook, NY : Curran Associates, Inc.. - 9781617388484 ; , s. 531-536
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Konferensbidrag (refereegranskat)abstract
- Many rotating machineries are supported by bearings with clearance, which are further clamped in, compared to the bearing stiffness, weak pedestals. As have been reported in several studies, it is essential to choose a proper clearance in order to avoid unwanted vibrations. When rotating machineries supported by bearings with clearance are subjected to stationary loads (gravity, magnetic pull etc.), it may not loose contact between the shaft and the bearing (i.e. full contact). However, even in full contact unwanted dynamics can occur which is of interest in this paper. It is found that the clearance give raise to anisotropic pedestal stiffness. It is further shown that some of the resonance frequencies decrease with the clearance.
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| 3. |
- Karlsson, Lennart, et al.
(författare)
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Editorial
- 2013
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Ingår i: International Journal of Product Development. - 1477-9056 .- 1741-8178. ; 18:1, s. 1-2
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 4. |
- Karlsson, Lennart, et al.
(författare)
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Mechanics of materials and structures: a simulation-driven design approach
- 2011
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Ingår i: Journal of Mechanics of Materials and Structures. - Berkeley, USA : Mathematical Sciences Publishers. - 1559-3959 .- 2157-5428. ; 6:1-4, s. 277-301
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Tidskriftsartikel (refereegranskat)abstract
- Engineering product development has developed considerably over the past decade. In order for industry to keep up with continuously changing requirements, it is necessary to develop new and innovative simulation methods. However, few tools and methods for simulation-driven design have been applied in industrial settings and proven to actually drive the development and selection of the ideal solution. Such tools, based on fundamental equations, are the focus of this paper. In this paper the work is based on two cases of mechanics of materials and structures: welding and rotor dynamical simulations. These two examples of simulation-driven design indicate that a larger design space can be explored and that more possible solutions can be evaluated. Therefore, the approach improves the probability of innovations and finding optimal solutions. A calibrated block dumping approach can be used to increase the efficiency of welding simulations when many simulations are required.
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| 5. |
- Lindström, John, et al.
(författare)
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A development process for Functional Products : hardware, software, service support system and management of operation
- 2012
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Ingår i: International Journal of Product Development. - : InderScience Publishers. - 1477-9056 .- 1741-8178. ; 16:3/4, s. 284-303
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Tidskriftsartikel (refereegranskat)abstract
- The development process for a Functional Product (FP) is complex and there is a need to coordinate, monitor, control and share information as well as to communicate properly among the parties involved in the process. This paper proposes a conceptual development process to manage the FP development, including development of hardware, software, service support system, and how to manage the operation of an FP. Further, challenges related to the integrated development of FPs are also discussed.
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| 6. |
- Lindström, John, et al.
(författare)
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Functional product development : what information should be shared during the development process?
- 2012
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Ingår i: International Journal of Product Development. - : InderScience Publishers. - 1477-9056 .- 1741-8178. ; 16:2, s. 95-111
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Tidskriftsartikel (refereegranskat)abstract
- The development process for a Functional Product (FP) is complex and there is a need to share information as well as to communicate it among the parties involved in the process. The paper concerns shared information that is of specific interest when developing FPs, in contrast to information that must be shared during a general product or service development process. The findings are compiled in a conceptual table comprising such specific information items pertaining to both the initial development as well as post development parts of an FPs lifecycle. This table can be used as an aid to any development process or method, as it points out information items that must necessarily be shared, but not how they to be shared.
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| 7. |
- Löfstrand, Magnus, 1974-, et al.
(författare)
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Functional product system availability : simulation-driven design and operation through coupled multi-objective optimisation
- 2011
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Ingår i: International Journal of Product Development. - Bucks, United Kingdom : InderScience Publishers. - 1477-9056 .- 1741-8178. ; 13:2, s. 119-131
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Tidskriftsartikel (refereegranskat)abstract
- This paper describes on a conceptual level how the availability of functional products (consisting of hardware (HW) and a support system) may be simulated. The main objective of this paper is to present a simulation-driven methodology for predicting and optimising the availability and cost of functional products in both development and operation. The proposed simulation and optimisation methodology includes both HW and support system models, which coupled form a simulation model of a system (functional product) delivering the function. Two different simulation-driven methodologies are suggested in the paper: one for development and another for operation of functional products
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| 8. |
- Löfstrand, Magnus, 1974-, et al.
(författare)
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Modelling and simulation of functional product system availability and support costs
- 2012
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Ingår i: International Journal of Product Development. - Bucks, United Kingdom : InderScience Publishers. - 1477-9056 .- 1741-8178. ; 16:3-4, s. 304-325
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Functional products (FP), total offers or product service systems, that comprise of both hardware (HW) and support services (SS) sold as an integrated offering under an availability guarantee, are becoming increasing popular in industry. This paper addresses, through modelling and simulation, the challenge faced by suppliers in developing an integrated HW and SS design to produce an FP which meets contracted availability. A recently published framework specified how an integrated model hardware and service support system model could be used to obtain functional availability predictions and perform simulation driven functional product development. This paper presents the first example of an integrated functional product model. It uses fault tree, Petri net and discrete event simulation techniques to enable the prediction of functional product availability and support costs. Such predictions are used here to evaluate and compare different service support system designs.
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| 9. |
- Nyholm, Tufve, et al.
(författare)
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Systematisation of spatial uncertainties for comparison between a MR and a CT-based radiotherapy workflow for prostate treatments
- 2009
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Ingår i: Radiation Oncology. - 1748-717X. ; 4:54
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Tidskriftsartikel (refereegranskat)abstract
- Background: In the present work we compared the spatial uncertainties associated with a MR-based workflow for external radiotherapy of prostate cancer to a standard CT-based workflow. The MR-based workflow relies on target definition and patient positioning based on MR imaging. A solution for patient transport between the MR scanner and the treatment units has been developed. For the CT-based workflow, the target is defined on a MR series but then transferred to a CT study through image registration before treatment planning, and a patient positioning using portal imaging and fiducial markers. Methods: An "open bore" 1.5T MRI scanner, Siemens Espree, has been installed in the radiotherapy department in near proximity to a treatment unit to enable patient transport between the two installations, and hence use the MRI for patient positioning. The spatial uncertainty caused by the transport was added to the uncertainty originating from the target definition process, estimated through a review of the scientific literature. The uncertainty in the CT-based workflow was estimated through a literature review.Results: The systematic uncertainties, affecting all treatment fractions, are reduced from 3-4 mm (ISd) with a CT based workflow to 2-3 mm with a MR based workflow. The main contributing factor to this improvement is the exclusion of registration between MR and CT in the planning phase of the treatment.
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| 10. |
- Reed, Sean, et al.
(författare)
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Modelling service support system reliability
- 2011
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Ingår i: First IFAC Workshop on Advanced Maintenance Engineering, Services and Technology (2010). - Red Hook, NY : IFAC, International Federation of Automatic Control. - 9783902661784 ; , s. 56-61
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Konferensbidrag (refereegranskat)
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