Repositorio Institucional Universidad EAFIT ::Examinando por Autor "Mejía-Gutiérrez, R."

Examinando por Autor "Mejía-Gutiérrez, R."

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Design Verification through virtual prototyping techniques based on Systems Engineering
(Springer London, 2017-10-01) Mejía-Gutiérrez, R.; Carvajal-Arango, R.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
The increasing offer of software tools for product development introduces methodological questions to design engineers in terms of the easiness of tool integration and design activities' sequencing. Nowadays, Design Verification and Validation through prototyping techniques have been enriched with software solutions enabling virtual prototyping to take more product's behaviors into consideration during analysis and simulation. It is the case of the Systems Engineering module in CATIA (TM) V6 that proposes a sequential "Requirements-Functional-Logical-Physical Design" (RFLP) approach to link conceptual design activities with 3D-models and simulation. Since some practitioners traditionally use these concepts, this article presents an analysis, based on action research, to evaluate the Design Verification activities as well as the tools integration offered by the new Product Lifecycle Management vision of CATIA (TM) V6. The analysis enabled authors to refine and propose a model's nature-dependent design method, enriched from the basic RFLP concept. Additionally, the presented results also showed the benefits of using integrated approaches when designing complex products, represented in a case study on virtual Design Verification of an automotive sub-system.
Ergonomic considerations in product design through PLM technologies
(Springer Verlag, 2016-01-01) Marroquín, C.; Gaviria, M.; Mejía-Gutiérrez, R.
This article presents an integration of a product design methodology with emphasis in ergonomics with PLM. The articulation requires a comparative overview of the management levels offered by both approaches. PLM focuses on procedural activities and task performance and supports the ergonomic design methodology into a project and process management level in which decisions and control claims a mayor role. As result, workflow and indicators solutions attached to PLM strategy approach are structured accordingly to particular needs of the methodology in question. © IFIP International Federation for Information Processing 2016.
Experts' Agreement Support for Distributed Engineering Knowledge Modelling
(Springer Verlag, 2013-01-01) Mejía-Gutiérrez, R.; Cálad-Álvarez, A.; Zuluaga-Holguín, D.
Knowledge sharing among partners in collaborative and concurrent engineering processes is becoming more critical for decision-making in Product Design Engineering (PDE). The approach presented in this article proposes a Fuzzy Logic (FL) based semi-automatic support for reaching agreements in the definition of variable's domain under a Constraint Satisfaction Problem (CSP) modelling process. A negotiation model is proposed, including suggestions about preferred domains for a variable that it is used for more than one expert. Competence of the users involved in the negotiation is measured with a set of developed indexes. A Fuzzy Inference System (FIS) is used to calculate user's indexes and suggestions about the domain are made based on the proposed domains and competence index of the experts. The proposal is included in a Multi-Agent System (MAS) for supporting distributed knowledge modelling. © Springer-Verlag Berlin Heidelberg 2013.
From functional prototypes to industrial products
(Springer-Verlag France, 2017-05-01) Hernández-Pérez, J.C.; Osorio-Gómez, G.; Mejía-Gutiérrez, R.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
Nowadays, engineering programs with Problem Based Learning methodologies, develop functional prototypes for demonstration purposes. Most of these ideas, many of them promising, are left behind once the academic term is over. Only a slight percentage of them are followed by an industrialization process, which is not formalized and it is based on third-party experiences. Even if well-known product design methodologies include some methods and activities oriented to evolve the product along its life cycle, they are not suitable for academic projects or they leave out some aspects of the local context. This has been an unexploited area, with high potential as there is no transcendence with academic projects; especially after all the time, effort, and creativity employed into a potentially profitable idea. In this way, the authors propose a methodology intended to allow the transition from academic functional prototype to a product ready to be industrialized according to the capabilities of the local context. Emerging economies, where industrial capabilities may be limited. The development of the methodology has been applied in a case study of an individual electric vehicle. This vehicle was developed with students and researchers within the Design Engineering Research Group (GRID) and it is intended to transport the persons responsible to distribute mail, and packages internally in the University campus. The object of such a case is to study the feasibility to promote this vehicle from functional prototype to a product ready to be industrialized under local industrial constraints. © 2015, Springer-Verlag France.
A fuzzy negotiation model to assign variable's domain in constraint satisfaction problems: An agent based collaborative engineering modeling case
(IOS PRESS, 2012-01-01) Mejía-Gutiérrez, R.; Cálad-Álvarez, A.; Zuluaga-Holguín, D.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
Knowledge sharing among partners from a distributed engineering team is becoming more critical for decision making. The work presented in this article proposes to support users of an agent based application for collaborative product design, during the definition of an engineering problem under a Constraint Satisfaction Problem (CSP) approach. The scope of this work covers the domains definition for variables from the CSP distributed model. A semiautomatic negotiation model is proposed in order to give users suggestions about a preferred domain for a variable that is used for more than one expert. A set of quantitative indexes measure the competence that users have over variables in the model, helping the system in decision making. A fuzzy inference system is used to calculate user's competence index and suggestions are made based on a fuzzy approach in order to achieve trade-offs in collaborative domains definition. © 2012 The authors and IOS Press. All rights reserved.
Heuristics-based design process
(Springer-Verlag France, 2016-11-01) Calle-Escobar, M.; Mejía-Gutiérrez, R.; Nadeau, J.-P.; Pailhes, J.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
This article explores the applicability of heuristic rules into the decision-making processes involved in design practices, with the aim of generating a strategic approach for the fixation, tangibilization and re-utilization of knowledge within organizations. For this purpose, the research focuses on the creation of a methodological approach and a support tool that seeks to facilitate the introduction of heuristics into particular stages of the design process, such as concept development and architecture definition. This is achieved by providing an initial analysis of the design problem, and the definition of specific problem solving actions based on heuristics. This means that, with the aid of tools specifically developed for the method, the process will help design engineers explore several solution principles with applications previously implemented in diverse domains, thus triggering creativity in problem solving activities. This will enable a more Diverse concept generation and a more detailed product development process. In addition, it will allow organizations to work with tools and procedures for them to ensure that emerging knowledge can be integrated to the proposed approach and reused in the future.
Impact analysis of compressed hygroscopic particulate material
(International Journals of Engineering and Sciences Publisher, 2016-01-01) Aramburo-Londoño, M.; Pérez-Cardona, S.; Calle-Escobar, M.; Velásquez-López, A.; Mejía-Gutiérrez, R.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
This article presents a dynamic analysis of the behaviour of a sample of hygroscopic particulate compressed material in the context of diverse scenarios of the product's lifecycle. The analysis is executed using two complementary methods: (a) an experimental study that recreates a particular impact situation in a controlled physical environment, and (b) a static virtual analysis developed under the Finite Element Method (FEM) for the evaluation of vibration effects on the product. The objective of the analysis is to determine, on one hand, the precise compressing pressure that enables the powder to maintain cohesion throughout the handling and transporting stages, and yet be easily disaggregated manually for it to be used as intended in the final stage of its lifecycle. On the other hand, it is expected of both simulations to estimate an incidence in the behaviour of the compressed powder sample derived from its geometric characteristics and its particular handling and transportation situation, with the goal of defining ideal conditions for the product packaging. © February 2016 IJENS.
Implementation of ergonomic aspects throughout the engineering design process: Human-Artefact-Context analysis
(Springer-Verlag France, 2017-05-01) Hoyos-Ruiz, J.; Martínez-Cadavid, J.F.; Osorio-Gómez, G.; Mejía-Gutiérrez, R.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
The design process of an object, system or space must consider the physical, mental and psychological traits of its intended users. Moreover, the results of the design process are also defined by the attributes related to the context. However, current product design approaches does not offer a proper balance among the “human”, “artefact” and “context” dimensions. Consequently, a product design methodology that covers the overall Human-Artefact-Context system, from a cognitive and physical ergonomics point of view, is proposed. The generalization of the proposal is based on a synergic structure of User-Centered Design methodologies and ergonomic criteria that prevails throughout the product development stages. The latter ensures a better adaptation to specific context and user needs in a way that improves efficiency, security and consumer well-being. © 2015, Springer-Verlag France.
Influence of epoxy resin as encapsulation material of silicon photovoltaic cells on maximum current
(EDP Sciences, 2017-01-01) Acevedo-Gómez, D.; Velásquez-López, A.; Osorio-Gómez, G.; Mejía-Gutiérrez, R.
This work presents an analysis about how the performance of silicon photovoltaic cells is influenced by the use of epoxy resin as encapsulation material with flat roughness. The effect of encapsulation on current at maximum power of mono-crystalline cell was tested indoor in a solar simulator bench at 1000 w/m and AM1.5G. The results show that implementation of flat roughness layer onto cell surface reduces the maximum current inducing on average 2.7% less power with respect to a cell before any encapsulation. The losses of power and, in consequence, the less production of energy are explained by resin light absorption, reflection and partially neutralization of non-reflective coating. © The Authors, published by EDP Sciences, 2017.
A knowledge management approach through product lifecycle management implementation: An industrial case study
(Springer Verlag, 2013-01-01) Mejía-Gutiérrez, R.; Marroquín, C.; Giraldo-Gomez, J.D.
During new product development, knowledge must be exchanged across organizational, geographical, cultural, and language barriers [1]. Emerging technologies such as Product Lifecycle Management (PLM) combined with Business Process Modelling (BPM) tools provide means to enable collaboration among distributed participants specifically in the product design process. In this paper, an alternative approach for planning and development of projects that requires knowledge management and information integration in small and medium enterprises, is presented. A case study in the Architecture Engineering and Construction (AEC) industry is performed and, as a result, the methodology is applied to support the design and construction of waste treatment plants. Finally, the design of the proposed approach is presented including how engineering processes were identified, analyzed and improved through BPM and PLM. © IFIP International Federation for Information Processing 2013.
A multi-agent approach for engineering design knowledge modelling
(SPRINGER, 2011-01-01) Mejía-Gutiérrez, R.; Cálad-Álvarez, A.; Ruiz-Arenas, S.
Usually a product design process implies collaborative work between experts located in different geographical locations. This context makes the process of taking design decisions more difficult and slow. Nowadays, definition of variables and constraints is a key issue, that experts related with product design have to face throughout the product lifecycle. A Multi-Agent system is proposed for tutoring experts in a standardized manner for the definition of variables and constraints. This domain specific knowledge will be use to build "Constraint Satisfaction Problem" models to support early stages of product design, specifically embodiment design. © 2011 Springer-Verlag.
Multi-layer Graph Theory Utilisation for Improving Traceability and Knowledge Management in Early Design Stages
(Elsevier, 2017-01-01) Ríos-Zapata, D.; Pailhès, J.; Mejía-Gutiérrez, R.
Decision making processes in design often challenges designers to prioritise specifications and variables in order to develop solutions that are closer to the product's requirement goals. Concerning to support their decisions, different tools and methods are used by engineers and designers allowing to reduce uncertainty in design. Nevertheless, many of these decision support systems are focused in late design stages, such as detailed design and manufacturing design, even if the possibility to influence a new product is higher in early stages. The issues regarding to those situations are often associated to design processes related to multi-physics design, where the modification of geometric-related variables might affect the performance of the solution, and the analysis of tracking the influence of the modifications might generate reprocessing and loses of time, specially when those relations are tricky and are not easily identifiable by analysing equations and a manual analysis of requirements must be performed. This article is centred in proposing a traceability model for early design stages based in graph theory. The proposal supports the information generated in design, from the input requirements (linguistic field) up to mathematical modelling and variables definition (real numbers field). This information is arranged into different layers, allowing a multilevel approach in terms of information management. The model also features a novel solution for weighting vertex in graph model, featuring a model that balances the direction of improvement, the importance and flexibility of any specification and how its behaviour will affect the design variables associated to it. The goal of the proposed model is to offer to designers, since the conceptual design stage, a method that can show automatically the level of correlation between any pair variables and specifications by the use of information trees and featuring chains that can connect them whether there is or not a connection via equations. © 2017 The Authors.
Nominal energy optimisation method of constrained battery packs through the iteration of the series-parallel topology
(John Wiley and Sons Ltd, 2017-10-10) Fernández-Montoya, M.; Arias-Rosales, A.; Osorio-Gómez, G.; Mejía-Gutiérrez, R.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
The design of a battery pack commonly deals with high performance goals and challenging constraints in terms of cost, volume or weight. One of the most crucial variables to maximise is the nominal energy, which depends on the number of discrete battery cells that can be allocated and their individual technical specifications. This work proposes a systematic method to optimise the nominal energy of a constrained battery pack from the perspective of the series-parallel topology. A mathematical and graphical characterisation is presented on how the main battery's variables are related to a topology bounded to discretisation procedures. It was theoretically found that the effects of rounding the values of the topology may lead to a considerable loss of potential nominal energy, a risk that increases linearly with the number of series. The behaviour of the battery is assessed under nominal conditions and under the event of a cell failure. The theoretical analysis suggests that the detrimental effects due to an open-circuit increase as the number of series increases, while it is the opposite in the case of a shorted cell. The method is satisfactorily implemented in the development of two different battery packs for solar competition cars with limiting regulations. The candidate topologies outperformed the nominal energy of topologies defined without the method in up to 5%. It was also found that selecting an energy-maximising topology is not always the most convenient choice, because other variables may be of interest and are dependent on the topology as well. The method is of great use to guide the topology definition process in early theoretical stages, which is usually a compromise between allocating as much cells as possible within constraints, and approaching other performance goals such as a given nominal voltage or capacity. Copyright (c) 2017 John Wiley & Sons, Ltd.
Patent-based creativity method for early design stages: case study in locking systems for medical applications
(Springer-Verlag France, 2017-08-01) Ríos-Zapata, D.; Duarte, R.; Pailhès, J.; Mejía-Gutiérrez, R.; Mesnard, M.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
Current product design processes are demanding functionality improvements, in order to make the difference in the market. This situation has led designers, engineers and specialist to work together in order to develop new methodologies that might reduce development time and support the quality in the product. In this connection, several tools and methodologies have been proposed over the last decade centred in the combination of industrial design techniques with functional engineering design. Many of these new solutions were based into the treatment of patents in order to reduce the analysis time in terms of existing solutions and how those solutions could be implemented into creation of new products. This article presents the development of a creativity method, based on combination and mutation models, that supports patent search and analysis in the early design stages. The use of this method will be portrayed into the design of the locking system of a medical device used for the treatment of the camptocormia.
Smart experience engineering to support collaborative design problems based on constraints modelling
(IOS PRESS, 2014-01-01) Cálad-Álvarez, A.; Mejía-Gutiérrez, R.; Sanín, C.M.; Szczerbicki, E.
Engineering design is a knowledge intensive process. Experts' experiences from different product life-cycle stages play a key role in problem solving during design decision making by linking up knowledge to find better solutions for a specific design problem. Different approaches have been used to support Collaborative and Concurrent Product Design, such as Constraint Satisfaction Problem (CSP) modelling. Additionally, due to the need of capitalizing these experiences, the Set of Experience Knowledge Structure (SOEKS) is used to store and manage experiences of decision making process. However it was necessary to adapt the structure to property manage the constraints approach used in Engineering Design. This article presents a proposed adaptation to SOEKS structure in order to be able to store and reuse CSP design experiences for further re-use and analysis of multiple experiences. Finally, a case study is presented in order to show how the proposed approach can be used in the industrial applications. © 2014-IOS Press and the authors. All rights reserved.
Solar array design based on shadow analysis for increasing net energy collection in a competition vehicle
(SPIE, 2015-06-08) Osorio-Gómez, G.; Mejía-Gutiérrez, R.; Suárez-Castañeda, N.; Gil-Herrera, A.; Barrera-Velásquez, J.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
Photovoltaic (PV) applications such as in the architectural, automotive, and aerospace industries face design contradictions because they are expected to produce a lot of energy but are constrained by available area, surface shape, incident irradiance, shadows, and other aspects that have a negative influence on the energy produced by the solar panel. Solar competition vehicles are some of these challenging PVapplications. The design of such solar arrays needs to consider efficiency evaluation in order to optimize space; it is difficult not to install solar modules in areas impacted by shadows. A design procedure for a solar array configuration based on shadow analysis for competition vehicles is presented. The principle is that shadows in moving objects can be simulated, since the vehicle, the earth and the sun are are moving in semipredictable patterns, thus net energy collection can be forecast. The case study presented is the solar array design of a vehicle that participated in the World Solar Challenge 2013. The obtained results illustrate how the employment of the procedure gives insights on important aspects to consider and also delivers qualitative and quantitative information for decision making. In addition, the experience in competition highlights some issues to be considered, modified, or improved in further vehicle designs. © 2015 Society of Photo-Optical Instrumentation Engineers.
A systems-engineering approach for virtual/real analysis and validation of an automated greenhouse irrigation system
(Springer-Verlag France, 2016-11-01) Carvajal-Arango, R.; Zuluaga-Holguín, D.; Mejía-Gutiérrez, R.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
In the context of multidisciplinary complex systems design, modelling and simulation are key components in decision making. It allow engineers to validate design alternatives at early development stages. Consequently, it is possible to reduce uncertainty on requirements compliance and secure better decisions for downstream stages of product development. This article describes the analysis of a virtual prototype of an automated greenhouse irrigation system. It is modelled and compared with the real system implementation, finding some differences and similarities between both system testing approaches. The intrinsic dependence of experimentation and modelling is also discussed as both, experimental and random data, are important to be used as inputs to validate virtual models.
A taxonomy for product shape analysis to integrate in early environmental impact estimations
(Springer-Verlag France, 2017-05-01) Agudelo, L.-M.; Nadeau, J.-P.; Pailhes, J.; Mejía-Gutiérrez, R.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
Eco design and sustainable design are words with increasing relevance in the development of new products. One of the main reasons is the growing worry about the environmental issues that the planet is having nowadays, hence the demand for products with this aspect included. Now designers have the opportunity to adapt useful tools to estimate the environmental impact of a design concept in order to develop environmentally friendly products. However, it is only in the last stages of design process where design teams have enough information to calculate the impact of a proposal. This calculation is a tedious, expensive and demanding activity and involving a high level of knowledge about materials, manufacturing processes and eco-design strategies. For this reason, environmental impact estimations gain relevance in the early stages of the design process, where more risks can be taken with a lower cost. This article suggests a taxonomy to analyze product’s shape; in order to offer a structured and systematic way of performing a morphology classification, being able to integrate this subjective aspect to other necessary variables needed to estimate the environmental impact. It offers a way to understand how shape, material and Manufacturing process are key aspects to make environmental impact estimations of preliminary concepts during the Conceptual Design. © 2016, The Author(s).
Towards the maintenance principles of cyber-physical systems
(ASSOC MECHANICAL ENGINEERS TECHNICIANS SLOVENIA, 2014-01-01) Ruiz-Arenas, S.; Horváth, I.; Mejía-Gutiérrez, R.; Opiyo, E.Z.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
Cyber-physical systems (CPSs) are rapidly proliferating in different applications. Their system features significantly differ from those of linear complex systems (LCSs). Consequently, they pose novel challenges with regard to ensuring the dependability of system operation. Maintenance of CPSs raises new theoretical and practical issues. To guarantee a high level of dependability, new and efficient system maintenance principles should be explored and operationalized in various contexts. This paper reports on the first results of the authors' work in this direction. A comprehensive literature review has been conducted with the objective of identifying the specific features of LCSs and CPSs. We analysed the major maintenance principles and approaches currently applied to complex systems to see how they can be applied to CPSs. We found that the existing maintenance principles have various relationships with CPSs: (i) some of them cannot be considered in the context of CPSs due to incongruent system features, (ii) some of them can be adapted due to certain partial congruencies, and (iii) some of them can be applied directly due to the congruency of some system features of LCSs with CPSs. It was also found and demonstrated through a number of practical examples that many specific maintenance principles need to be developed for CPSs. We assert that the system features of CPSs without parallel in LCSs primarily reveal what sort of new maintenance principles and approaches are needed. The ultimate goal of our on-going research is to define and test these new maintenance principles. In this paper, we identify and define these principles, starting from the unique system features of CPSs and aiming to develop a maintenance advisory system. © 2014 Journal of Mechanical Engineering. All rights reserved.

Examinando por Autor "Mejía-Gutiérrez, R."

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