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Coulibaly A.,Lgeco Laboratoire Of Genie Of La Conception | Gardoni M.,Lgeco Laboratoire Of Genie Of La Conception | Gaye K.,Lgeco Laboratoire Of Genie Of La Conception | Gaye K.,University of Ziguinchor | Huang Y.,Lgeco Laboratoire Of Genie Of La Conception
Proceedings of the ASME Design Engineering Technical Conference | Year: 2010

The mechatronic systems are manufactured and high technology integrated products consisting of mechanical components, electronic devices and software modules. Such products are present in a very fast growing number of industrial products like mobile phones, digital cameras, high standing automobiles, aeronautics or NC machines. Some of these products are mass consumption items such as mobile phones that are characterized by a relatively short commercial lifetime. And then these products are renewed after a few months. Dealing with all this growing amount of wastes generated, is a crucial environmental problem that is becoming a worrying situation. This article proposes an approach aimed to lifecycle design for the recyclability of mass consumption mechatronic products. In this paper, we firstly describe and analyze the mechatronic products behavior from reliability and recyclability viewpoints. Then, we propose an approach for designing such products in order to fulfill recyclability requirements by using a knowledge-based design adviser module. Copyright © 2010 by ASME. Source


Houssin R.,University of Strasbourg | Houssin R.,Lgeco Laboratoire Of Genie Of La Conception | Coulibaly A.,Lgeco Laboratoire Of Genie Of La Conception
Computers in Industry | Year: 2011

Improving product behavioral performance in design process needs an innovative approach to integrate simultaneously most of the trades (safety, reliability, maintainability, etc.). Currently, safety integration is done in the latest phase of design process, to respect safety directives. This late integration causes some contradictions between productivity and safety. These contradictions could be related to technical and organizational problems. This paper proposes an innovative approach that aims to eliminate these contradictions in order to improve product performance in the use situations. This approach is based on 4 steps: systemic safety integration using Working situation model, taking into account the requirements of safety directives and standards; identifying the contradiction resulting from designer's choices and finally resolving these contradictions using adapted methods like TRIZ. An application case is outlined in off-set industry, to show the applicability and usefulness of our approach. © 2010 Elsevier B.V. All rights reserved. Source


Houssin R.,Lgeco Laboratoire Of Genie Of La Conception | Houssin R.,University of Strasbourg | Coulibaly A.,Lgeco Laboratoire Of Genie Of La Conception
Computers and Industrial Engineering | Year: 2014

The availability of a system or equipment is one of the crucial characteristics that measures the customer satisfaction and strongly influences his final choice decision between concurrent products. The aim of this work is to provide an approach to improve the products availability assessment by taking into account the safety criteria by considering the use situations at design stage. Our work focuses on the routine design of complex products. The availability is often simply estimated considering reliability and maintainability. Basically, the intrinsic availability is the probability that it is operating satisfactorily at any point in time when used under conditions stated by design specifications. The time considered includes operating time and active repair time. Thus, intrinsic availability excludes from consideration all other times in the product lifecycle such as: accident management time, storage time, administrative time or logistic time. But many studies show that the loss of availability performance is also due to accidents that occur in different unforeseeable utilization situations. This engenders stops of the system to ensure the users safety according to standards recommendations. In this purpose, we consider the structural product architecture and the different use cases that correspond to the operational states and downtimes due to stop events that may happen during the utilization like failures, maintenance tasks and accidents. Then, we propose a product behavioral analysis including the use cases to describe interactions between the product and users or maintenance operators. We use Markov chains to model the use cases corresponding to operating time (OT), maintenance time (MT) and preparing time after accidents (RT). Then these three parameters are considered to specify a generic approach to improve the availability assessment. Such an approach provides the traceability of the product behavior along its lifecycle. In this way, the main causes of stop can be identified and this may guide the designer for improving the availability of the product future versions. To validate our approach, an application is presented considering a printing line. The comparison of our simulation considering an industrial case study shows a good agreement about the influence of safety on the availability. © 2014 Elsevier Ltd. All rights reserved. Source

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