19th CIRP Design Conference – Competitive Design, 2009

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https://dspace.lib.cranfield.ac.uk/handle/1826/3539

Editors: Rajkumar Roy and Essam Shehab
Organised by: Cranfield University
Sponsored by: Mori Seiki – The Machine Tool Company
ISBN: 978-0-9557436-4-1

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Now showing 1 - 20 of 86

Open Access
Computer-Aided Conceptual Design Through TRIZ-based Manipulation of Topological Optimizations
(Cranfield University Press, 2009-03-31) Cascini, G.; Cugini, U.; Frillici, F. S.; Rotini, F.; Rajkumar Roy; Essam Shehab
In a recent project the authors proposed the adoption of Optimization Systems [1] as a bridging element between Computer-Aided Innovation (CAI) and PLM to identify geometrical contradictions [2], a particular case of the TRIZ physical contradiction [3]. A further development of the research has revealed that the solutions obtained from several topological optimizations can be considered as elementary customized modeling features for a specific design task. The topology overcoming the arising geometrical contradiction can be obtained through a manipulation of the density distributions constituting the conflicting pair. Already two strategies of density combination have been identified as capable to solve geometrical contradictions.
Open Access
Optimal Design of Planar Paraller Manipulators 3 RRR Through Lower Energy Consumption
(Cranfield University Press, 2009-03-31) Rojas-Salgado, A. A.; Ledezma-Rubio, Y. A.; Rajkumar Roy; Essam Shehab
In most existing studies, the solutions of planar parallel manipulators are restricted to a feasible region of solution. This research provides an optimal solution in link dimension of planar parallel manipulators to a defined trajectory and structure of the links, minimizing the mechanical energy of the manipulator.An algorithm will be obtained that allows adequate dimensioning of the manipulator for a specific task, by means of a passive reconfiguration. With this method most of the energy is used by the manipulator to execute a task, not for the manipulator’s movement. The process is illustrated with an example.
Open Access
Object-Oriented Simulation Model Generation in an Automated Control Software Development Framework
(Cranfield University Press, 2009-03-31) Foeken, M. J.; van Tooren, M. J. L.; Rajkumar Roy; Essam Shehab
The automated development of control software for mechatronic systems requires the integration of control models for design and verification purposes. To obtain high-fidelity models, unintended behaviour of the system must be taken into account which requires knowledge about the systems architecture and component interaction. Furthermore, integration of design and analysis tools into a meta-model framework is needed to exchange system information. This paper discusses the use of Modelica to organise libraries and model the behaviour of systems in this framework, and the need for a knowledge-based tool to automatically generate these models.
Open Access
How to Answer to the Challenges of Competencies Management in Collaborative Product Design?
(Cranfield University Press, 2009-03-31) Rose, B.; Robin, V.; Sperandio, S.; Rajkumar Roy; Essam Shehab
Collaboration is an essential factor of the design activities performance. This collaboration occurs between actors suited with varied expertises, coming from various trades and thus building a real network around the design project. It is advisable to manage with effectiveness the follow-up and the capitalization of information exchanged within this network. With the aim of increasing the performance of the design activity, the set up of competence management tools within the design teams is today necessary. However, these competencies management within a framework of collaborative design must answer various challenges. This article presents various proposals to answer them.
Open Access
We are Designers Because We Can Abstract
(Cranfield University Press, 2009-03-31) Adel, A.; Djeridi, R.; Rajkumar Roy; Essam Shehab
Due to the increasing systems complexity, architecture design became an important issue. It gained interest and its importance was framed in three domains: as a way to understand complex systems, to design them, to manage their manufacturing process and to provide long-term rationality. The purpose of this paper is, firstly, to survey the existing definition approaches on architecture. Secondly, we propose a model for architecture design which articulates the potential linkage between two principle concepts: synthesis and abstraction. Our proposal model focuses on abstraction concept and permits an effective top-down design approach. It helps also designers to more respond to issues that characterize architecture design.
Open Access
Integrated design at VIDA centre Poland
(Cranfield University Press, 2009-03-31) Weiss, Z.; Konieczny, R.; Diakun, J.; Grajewski, D.; Kowalski, M.; Rajkumar Roy; Essam Shehab
The modern design process forces the tight integration of processes connected with the development of the product. All the steps of the design process are based on geometrical models created in CAD systems. The geometry of the product is used for programming of the virtual environment of the product, its behaviour, manufacturing and so on. It is necessary to remember that the integrated design process needs special skills and knowledge from engineers. The authors of this paper presented a brief description of the VIDA Centre at Poznań University of Technology, its structure and skills in the area of integrated design. Couples of examples of projects realized at VIDA Centre’s environment as integrated design of products are described as well.
Open Access
European-wide Formation and Certification for the Competitive Edge in Integrated Design
(Cranfield University Press, 2009-03-31) Riel, A.; Tichkiewitch, S.; Messnarz, R.; Rajkumar Roy; Essam Shehab
Competitive Product Design is more and more linked to mastering the challenge of the complexity and multidisciplinary nature of modern products in an integrated fashion from the very earliest phases of product development. Design Engineers are increasingly confronted with the need to master several different engineering disciplines in order to get a sufficient understanding of a product or service. Industrialists demand for the certification of these skills, as well as for their international recognition and exchangeability. This paper describes the approach that EMIRAcle takes together with the ECQA in order to define and establish job roles, curricula and certifications in the domain of Integrated Engineering on a European level.
Open Access
A Knowledge Based Approach for Affordable Virtual Prototyping: the Drip Emitters Test Case
(Cranfield University Press, 2009-03-31) Cicconi, P.; Raffaeli, R.; Rajkumar Roy; Essam Shehab
Virtual prototyping lacks of application in SME due to the costs of software systems and the necessity of skilled operators. The aim is to improve dripper emitters design process reducing costs. A knowledge base is presented to gather data on products behaviour in terms of experimental data and simulation results for a set of meaningful test cases. Input design parameters were linked to performance indices on the base of the correlations emerged in the analysis. Specifications for a new product can be used to extract similar cases and to define a possible solution in terms of a combination of them.
Open Access
Modelling the Product Development performance of Colombian Companies
(Cranfield University Press, 2009-03-31) Herrera-Hernandez, M. C.; Luna, C.; Prada, L.; Berdugo, C.; Al-Ashaab, Ahmed; Rajkumar Roy; Essam Shehab
This paper presents the general model of the Product Development Process (PDP) in the Metal mechanics Industry in Barranquilla-Colombia, since this sector contributes significantly to the productivity of this industrial city. This case study counted on a five-company sample. The main goal was to model the current conditions of the PDP according to the Concurrent Engineering philosophy. The companies were selected according to their productive profile, in order to contrast differences regarding the structure of their productive processes, conformation of multidisciplinary teams, integration of different areas, customers and suppliers to the PDP; human resources, information, technology and marketing constraints.
Open Access
Interrelating Products through Properties via Patent Analysis
(Cranfield University Press, 2009-03-31) Verhaegen, P.-A.; D'hondt, J.; Vertommen, J.; Dewulf, S.; Duflou, J. R.; Rajkumar Roy; Essam Shehab
TRIZ emerged from systematic analysis of patents, a process involving the mapping of innovative patents to extracted generic problems and generic inventive principles. During problem solving, TRIZ users, relying on their TRIZ skills, map their specific problem to a generic problem, solve it via TRIZ tools, and map back to a specific solution. A methodology and algorithm are proposed that, through identification of specific word categories in patents, analysis of term-term correlation data, and data mining techniques, automatically identify similar products, and properties relating or differentiating products. This algorithm can quantifiably guide creativity efforts and aid in patent portfolio management.
Open Access
Design Rework Prediction in Concurrent Design Environment: Current Trends and Future Research Directions
(Cranfield University Press, 2009-03-31) Arundachawat, Panumas; Roy, Rajkumar; Al-Ashaab, Ahmed; Shehab, Essam; Rajkumar Roy; Essam Shehab
This paper aims to present state-of-the-art and formulate future research areas on design rework in concurrent design environment. Related literatures are analysed to extract the key factors which impact design rework. Design rework occurs due to changes from upstream design activities and/or by feedbacks from downstream design activities. Design rework is considered as negative iteration; therefore, value in design activities will be increased if design rework is reduced. Set-based concurrent engineering is proposed as an alternative design approach to mitigate design rework risk, however, duplication effort for designing set of artefacts are still needed to consider before selecting set-based concurrent engineering in design activities.
Open Access
Reconfigurable micro-mould for the manufacture of truly 3D polymer microfluidic devices
(Cranfield University, 2009-03-31) Marson, Silvia; Attia, Usama M.; Allen, David M.; Tipler, P.; Jin, T.; Hedge, J.; Alcock, Jeffrey R.; Rajkumar Roy; Essam Shehab
This paper concerns the concept, the design and the manufacturing steps for the fabrication of a precision mould for micro-injection moulding of truly three dimensional microfluidic devices. The mould was designed using the concept of replaceable cavities to enable the flexible development of the complex microfluidic device and to reduce machining time and therefore costs during the prototyping, testing and subsequent production phase. The precision machining technique used for the cavity manufacture was micromilling.
Open Access
Contribution of two diagnosis tools to support interface situation during production launch
(Cranfield University Press, 2009-03-31) Surbier, L.; Alpan, G.; Blanco, E.; Rajkumar Roy; Essam Shehab
Firms are urged to constantly introduce new products. Hence, the New Product Development process should be mastered, especially its final phase, the production launch. This paper addresses the critical issue of the information exchange during production launch. Two diagnosis tools considering production launch as a key interface are presented. They permit to examine the information flows, to highlight their weaknesses and hence to find solutions for further improvements. This paper also presents the results of a case study where the diagnosis tools were implemented during a switchgear development project.
Open Access
Affordance Feature Reasoning in Some Home Appliances Products
(Cranfield University Press, 2009-03-31) Lim, J. S.; Kim, Y. S.; Rajkumar Roy; Essam Shehab
Interactions between human and objects are made through specific features of the object, which are adequate to the task context. During interactions, the perceived features vary according to the context. Affordances are the messages that products provide and users perceive in such a way that user actions are naturally induced with the help of such messages. In this research, we define affordance features as structural elements providing affordances. We classify affordance features into functional, ergonomics, and informative aspects. For some home appliances, common affordances and affordance features are identified so that they can be used in designing other products.
Open Access
Implementing an Internal Development Process Benchmark Using PDM-Data
(Cranfield University Press, 2009-03-31) Roelofsen, J.; Fuchs, S. D.; Fuchs, D. K.; Lindemann, U.; Rajkumar Roy; Essam Shehab
This paper introduces the concept for an internal development process benchmark using PDM-data. The analysis of the PDM-data at a company is used to compare development work at three different locations across Europe. The concept of a tool implemented at the company is shown as well as exemplary analyses carried out by this tool. The interpretation portfolio provided to support the interpretation of the generated charts is explained and different types of reports derived from the analyses described.
Open Access
An approach to the Integrated Design and Development of Manufacturing Systems
(Cranfield University Press, 2009-03-31) Nylund, H.; Salminen, K.; Andersson, P. H.; Rajkumar Roy; Essam Shehab
This paper describes an approach to integrated manufacturing systems. It aims to integrate design and development activities, as well as the entities existing in a manufacturing system. A model of manufacturing systems is presented, including manufacturing entities with different roles and domains related to them. The characteristics of the manufacturing entities are discussed, including changeability, service orientation, and learning capabilities. One of the main enablers is a digital manufacturing system, which includes tools for modeling, simulation and analysis, as well as digital information and knowledge. This is illustrated by an example process, from product ideas to the efficient production of the products.
Open Access
Web-based Collaborative Working Environment and Sustainable Furniture Design
(Cranfield University Press, 2009-03-31) Su, D.; Casamayor, J.; Rajkumar Roy; Essam Shehab
To meet the demand of online collaborative design, a Web-based Collaborative Working Environment (CWE) has been developed. An approach to enhance sustainable furniture design by utilizing the CWE is proposed. In this paper, the CWE framework is briefly presented, which consists of upperware, middleware and resource layers; then three key aspects of sustainable furniture design by utilizing the CWE are presented, including material and manufacturing processes selection, design for disassembly and damaged furniture return, followed by an example of damaged furniture return using the CWE to further illustrate the approach.
Open Access
Design for Low-Cost Country Sourcing: Motivation, Basic Principles and Design Guidelines
(Cranfield University Press, 2009-03-31) Lanza, G.; Weiler, S.; Vogt, S.; Rajkumar Roy; Essam Shehab
Not every product can be successfully sourced in low-cost countries. Disadvantageous cost structures or extremely complex workpiece designs are the most frequent reasons for failures. A design that has been tailored to low-cost country sourcing offers the possibility of increasing potentials while reducing risks and costs at the same time. The wbk Institute of Production Science at the Universität Karlsruhe (TH) developed a new approach which ensures that the product design meets the requirements of the supplier. This paper identifies the factors influencing the design, deduces basic principles and illustrates guidelines for an adapted product design.
Open Access
Analysing discrete event simulation modelling activities applied in manufacturing system design
(Cranfield University Press, 2009-03-31) Johansson, J.; Rajkumar Roy; Essam Shehab
In manufacturing industry, Discrete Event Simulation (DES) is applied in just a small fraction of the cases where it could give significant value. The complexity of the DES technology itself is one barrier to achieving its full potential in manufacturing system design. This paper focuses on methodologies which can be used in studying the modelling process, with the specific intent of integrating DES into the engineering design process of manufacturing systems. Ethnographical methodologies are proposed, as they are successfully applied to the analysis of the engineering design process. Observations from industrial practice indicate that visualisation in DES software is essential for the sequential verification of design activities.
Open Access
Work Roll Cooling System Design Optimisation in Presence of Uncertainty
(Cranfield University Press, 2009-03-31) Azene, Y. T.; Roy, Rajkumar; Farrugia, Didier; Onisa, C.; Mehnen, Jorn; Trautmann, H.; Rajkumar Roy; Essam Shehab
The paper presents a framework to optimise the design of work roll based on the cooling performance. The framework develops Meta models from a set of Finite Element Analysis (FEA) of the roll cooling. A design of experiment technique is used to identify the FEA runs. The research also identifies sources of uncertainties in the design process. A robust evolutionary multi-objective algorithm is applied to the design optimisation I order to identify a set of good solutions in the presence of uncertainties both in the decision and objective spaces.