Early Design Modeling and Simulation of Behaviors: Case Study of Mobile Work Machine

2009 ◽  
Author(s):  
William Brace ◽  
Eric Coatane´a ◽  
Heikki Kauranne ◽  
Matti Heiska
Keyword(s):  
Design Process ◽  
Simulation Models ◽  
Integrated Approach ◽  
Simulation Framework ◽  
Early Design ◽  
Early Evaluation ◽  
Design Structure ◽  
Qualitative Physics ◽  
Early Design Phase

The early evaluation of a proposed function structure for a product and also, the possibility to expose the potential failures related to this provides that the design process can be modeled in its entirety. However, so far there are no existed suitable models for the early phase of design process. This article presents an integrated approach aimed to explore the behaviors of concept designs in the early design phase. The approach is founded on a combination of Petri net, π-numbers, qualitative physics principles and Design Structure Matrix. The final aim is to implement this method on the SysML modeling language to integrate a simulation approach that is initially not standardized in the language. A second interest of the approach is to provide a coherent simulation framework that can be used as a reference to verify the coherency of other simulation models further in the design process.

scholarly journals A Unique Transdisciplinary Engineering-Based Integrated Approach for the Design of Temporary Refugee Housing Using Kano, HOQ/QFD, TRIZ, AD, ISM and DSM Tools

Designs ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 31
Author(s):  
Daniel Moran ◽  
Atila Ertas ◽  
Utku Gulbulak
Keyword(s):  
Rural Areas ◽  
Social Issues ◽  
Integrated Approach ◽  
Interpretive Structural Modeling ◽  
Design Problems ◽  
Design Structure ◽  
Function Design ◽  
Complex Engineering ◽  
Design Conflicts

The continued displacement of refugees from their homes and homelands (now greater than 50 million people worldwide) places increased focus and attention on evolving the designs of temporary housing that is available to be provided to the refugee population, especially in rural areas where housing does not already exist and must be constructed in very little time. Complex engineering problems involving social issues, such as this case study, benefit from the use of Integrated Transdisciplinary (TD) Tools (ITDT) to effectively and efficiently address the design questions related to them. The integrated use of TD Tools such as Kano Analysis, KJ Diagrams, Critical to Quality (CTQ), House of Quality (HOQ)/Quality Function Design (QFD), Theory of Inventive Problem Solving (TRIZ), Axiomatic Design (AD), Interpretive Structural Modeling (ISM), and Design Structure Matrix (DSM) through an end-to-end unique design process leads to innovation and elimination of design conflicts for especially complicated design problems. The objective of this study is to examine the design of temporary refugee housing using integrated TD tools mentioned above. This research concludes that the use of the ITDT approach provides an innovative, decoupled design.

Development of a DSM-Based Methodology in an Academic Setting

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
George Platanitis ◽  
Remon Pop-Iliev ◽  
Ahmad Barari
Keyword(s):  
Engineering Design ◽  
Design Process ◽  
Engineering Students ◽  
Design Structure ◽  
Academic Settings ◽  
Task Durations ◽  
Random Disturbances ◽  
Process Convergence ◽  
Work Transformation

This paper proposes the use of a design structure matrix/work transformation matrix (DSM/WTM)-based methodology in academic settings to serve engineering educators as a facilitating tool for predetermining the difficulty and feasibility of design engineering projects they assign, given both the time constraints of the academic term and the expected skill level of the respective learners. By using a third-year engineering design project as a case study, engineering students actively participated in this comprehensive use of DSM methodologies. The engineering design process has been thoroughly analyzed to determine convergence characteristics based on the eigenvalues of the system followed by a sensitivity analysis on the originally determined DSM based on data provided by students in terms of task durations and number of iterations for each task. Finally, an investigation of the design process convergence due to unexpected events or random disturbances has been conducted. The obtained predictive model of the design process was compared to the actual dynamics of the project as experienced by the students and the effect of random disturbances at any point in the design process has thereby been evaluated.

Towards Fewer Design Failures

1994 ◽  
Author(s):  
Zhihui Yao ◽  
Aylmer L. Johnson
Keyword(s):  
Design Process ◽  
Constraint Satisfaction ◽  
Systematic Design ◽  
Early Design ◽  
Joint Design ◽  
Functional Modelling ◽  
Modelling System ◽  
Knowledge Hierarchy

Abstract Many designs fail because one or more checks are not done, or are done too late during the design process. A functional modelling system is presented, which provides systematic design checking at early design phases by means of constraint satisfaction. However, problems can occur if the design to be checked involves too many constraints. This paper presents some extended research, which establishes a knowledge hierarchy for managing the mathematical constraints, so that the computer can process large designs. A case study of fastening joint design using this hierarchy is discussed.

Engineering Design Analysis Tool for Early Design Phase With Low-Fidelity Models: A Case of Hydraulic Crane

2017 ◽  
Author(s):  
Asko Ellman ◽  
Sami Pajunen ◽  
Ilari Laine ◽  
Eric Coatanea
Keyword(s):  
Engineering Design ◽  
Design Analysis ◽  
Design Parameters ◽  
Analysis Tool ◽  
Design Phase ◽  
Early Design ◽  
Standard Design ◽  
Hydraulic Crane ◽  
Early Design Phase

Model-based product design using computer simulation has become a standard design practice in most companies in mechanical engineering. However, there is a need for efficient simulation tools that can provide design-supporting information already at early design phase when the most important decisions are made. Design process and design tools need to be agile and enable iterative process where the design and its requirements can effectively be iterated. Low-fidelity models can be part of the solution for time issue in early design phase. Low-fidelity prototypes are simplified representations of functions and concepts in the virtual prototype. Axiomatic design with low-fidelity modelling approach is a promising concept for achieving design-supporting information in an efficient way. In this method, there is a linear mapping between design parameters and system characteristics. Non-linear models of the system are linearized at the nominal point. An engineering design analysis tool (EDA tool) to enhance EDA is constructed and presented in this paper. For evaluation of the usefulness of this tool, a case study is presented. The case study deals with a simple hydraulic crane that is manufactured from steel plate. The results of the case study design are compared with results achieved with conventional CAD and FEM tools. Modelling accuracy and required modelling and simulation efforts are compared in both cases.

How Uncertain Is Too Uncertain? Validity Tests for Early Resilient and Risk-Based Design Processes

2020 ◽  
Vol 143 (1) ◽  
Author(s):  
Daniel Hulse ◽  
Christopher Hoyle ◽  
Irem Y. Tumer ◽  
Kai Goebel
Keyword(s):  
Design Process ◽  
Epistemic Uncertainty ◽  
Expected Value ◽  
Design Phase ◽  
Design Processes ◽  
Early Design ◽  
Design Changes ◽  
High Level ◽  
The Cost ◽  
Early Design Phase

Abstract A number of risk and resilience-based design methods have been put forward over the years that seek to provide designers the tools to reduce the effects of potential hazards in the early design phase. However, because of the associated high level of uncertainty and low-fidelity design representations, one might justifiably wonder if using a resilient design process in the early design phase will reliably produce useful results that would improve the realized design. This paper provides a testing framework for design processes that determines the validity of the process by quantifying the epistemic uncertainty in the assumptions used to make decisions. This framework uses this quantified uncertainty to test whether three metrics are within desirable bounds: the change in the design when uncertainty is considered, the increase in the expected value of the design, and the cost of choice-related uncertainty. This approach is illustrated using two examples to demonstrate how both discrete and continuous parametric uncertainty can be considered in the testing procedure. These examples show that early design process validity is sensitive to the level of uncertainty and magnitude of design changes, suggesting that while there is a justifiable decision-theoretic case to consider high-level, high-impact design changes during the early design phase, there is less of a case to choose between relatively similar design options because the cost of making the choice under high uncertainty is greater than the expected value improvement from choosing the better design.

Functional Analysis Diagrams With the Representation of Movement Transitions

2013 ◽  
Author(s):  
Szu-Hung Lee ◽  
Pingfei Jiang ◽  
Peter R. N. Childs ◽  
Keith Gilroy
Keyword(s):  
Functional Analysis ◽  
Conceptual Design ◽  
Design Process ◽  
Mechanical Design ◽  
Functional Requirements ◽  
Design Structure ◽  
Machine Elements ◽  
Physical Elements ◽  
Types Of Information

A study on utilising a graphical interface to represent movement transmission within products has been conducted to support a creative conceptual design process that separates the consideration of functional requirements and motion requirements. In engineering design, many representations of product structure have been proposed to assist in understanding how a design is constituted. However, most of these representations demonstrate only functions and are not able to demonstrate design structure. Functional Analysis Diagrams (FAD) provides a solution for this. An FAD shows not only functions but also physical elements by the network of blocks and arrows and thus it is capable of demonstrating various types of information and the design scheme. This characteristic gives FADs an advantage for designers to combine different types of information including useful and harmful interactions to gain an overview of the design task. This study focuses on using circles instead of arrows to represent movement attributes of mechanisms and machine elements in a Kinematic Functional Analysis Diagram (KFAD) and explores methods of utilising it in mechanical design. A commercial case study of medical equipment design conducted with the assistance of KFADs and a component database, mechanism and machine elements taxonomy (MMET), is described to illustrate the process. The design outcome shows that it is feasible to follow the proposed conceptual design process. With the help of KFADs and the machine elements taxonomy to enable consideration of movements, diverse considerations and design solutions are possible.

scholarly journals Framework for resolving problems resulting from lean integration from the early design phases of production 3D printing machine

2021 ◽  
Vol 49 (2) ◽  
pp. 279-290
Author(s):  
Rabih Slim ◽  
Rémy Houssin ◽  
Amadou Coulibaly ◽  
Masih Hanifi ◽  
Hicham Chibane
Keyword(s):  
Cost Effectiveness ◽  
Design Methodology ◽  
3D Printer ◽  
Design Phase ◽  
Early Design ◽  
Machine Performance ◽  
Technical Solutions ◽  
Printing Machine ◽  
Early Design Phase

We focus on improving the performance of production machines (timesaving, flexibility, cost-effectiveness, safety) from the early design phase. Lean integration during the design phases might be a more appropriate solution, but this could be a source of some contradictions related to the machine performance and the usage requirements. In this paper, we propose an approach, based on Lean and Inventive Design Methodology (IDM-TRIZ), to identify and resolve these contradictions due to the Lean integration and also to provide innovative technical solutions. The approach is illustrated by the integration of the functionalities of the ''Single Minute of Exchange of Dies'' (SMED) and the ''5S'' method from the early design phase. A case study about the ''3D printer clogged nozzle'' outlines the feasibility of the proposed approach.

Product Family Redesign Using Additive Manufacturing

2018 ◽  
Author(s):  
Sangjin Jung ◽  
Timothy W. Simpson
Keyword(s):  
Additive Manufacturing ◽  
Product Family ◽  
Integrated Approach ◽  
Design Structure Matrix ◽  
Platform Architecture ◽  
Design Structure ◽  
Market Requirements ◽  
Different Types ◽  
The Impact

In this study we investigate how we can effectively redesign a product family using additive manufacturing (AM). Specifically, we propose an integrated approach to product family redesign using platform metrics for a product family that uses AM. The proposed approach can help identify what to platform and how to platform with AM. We employ a variety metric to measure the amount of redesign for each component, a commonality metric to capture different types of commonality, and Design Structure Matrix (DSM) to analyze a platform architecture. After integrating these metrics, we can optimize balancing the tradeoffs between commonality and differentiation of components. Components that offer little variety for the market can be made common and part of the platform while components that must be varied to achieve market requirements should not be platformed and may be easily customized with AM. In order to facilitate customization of AM components, we can evaluate redesign of platform interfaces to help embed flexibility and modularity into the product family. To investigate the impact of the integrated approach, we apply the proposed approach to a family of Unmanned Aerial Vehicles (UAVs) as a case study. The results show the proposed approach can be effectively employed to identify ways to redesign the UAV family to improve the balance of commonality and variety of future product offerings.

scholarly journals Integration of Sustainability Into Early Design Through Working Knowledge Model and Visual Tools

2009 ◽  
Author(s):  
Srikanth Devanathan ◽  
Pranav Koushik ◽  
Fu Zhao ◽  
Karthik Ramani
Keyword(s):  
Design Process ◽  
Environmental Sustainability ◽  
Modern Society ◽  
Design Stage ◽  
Knowledge Model ◽  
Early Design ◽  
Environmentally Sustainable ◽  
Early Design Stage ◽  
And Performance

The issue of environmental sustainability, which is unprecedented in both magnitude and complexity, presents one of the biggest challenges faced by modern society. Engineers, including mechanical engineers, can make significant contribution to the development of solutions to this problem by designing products and processes that are more environmentally sustainable. It is critical that engineers take a paradigm shift of product design i.e. from cost and performance centered to balance of economic, environmental, and societal consideration. Although there have been quite a few design for environment (DfE, or ecodesign) tools developed, so far these tools have only achieved limited industrial penetration: they are either too qualitative/subjective to be used by designers with limited experiences, or too quantitative, costly and time consuming and thus cannot be used during the design process specially during the early design stage. This paper develops a novel, semi-quantitative ecodesign tool that targets specially on early design process. The new tool is a combination of environmental life cycle assessment, working knowledge model, and visual tools such as QFD, functional-component matrix, and Pugh chart. Redesign of staplers is selected as a case study to demonstrate the use of the proposed tool. Efforts are on going to confirm that the new design generated using this new tool does have improved environmental performance.

Sign in / Sign up

Export Citation Format

Share Document