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Design Science Journal
Papers

Comparison of low- and high-fidelity approach in model based design in the case of a portable motion platform

Comparison of low- and high-fidelity approach in model based design in the case of a portable motion platform

Year: 2013

Editor: Udo Lindemann, Srinivasan V, Yong Se Kim, Sang Won Lee, John Clarkson, Gaetano Cascini

Author: Ellman, Asko Uolevi (1); Krus, Petter (2); Jouppila, Ville (3)

Series: ICED

Institution: 1: Tampere University of Technology, Finland; 2: Linköping University, Sweden; 3: Tampere University of Technology, Finland

Pages: 227-236

ISBN: 978-1-904670-52-0

ISSN: 2220-4334

Abstract

In this paper a low- and high-fidelity modeling approach was applied and compared in the case of design of a portable motion platform. In the low-fidelity design approach, a Design Analysis Tool was used for generating information about design sensitivity analysis and correlation of design parameters. In the high-fidelity design approach, the motion platform was designed using Matlab/Simulink/SimMechanics including the mechanical and pneumatic subsystem of the platform.

These approaches were compared in terms of required modeling effort to a relative error of predicted and measured system properties. The results of a low-fidelity model were achieved within one day whereas high-fidelity approach required three weeks of work. The relative error in low-fidelity approach was about 21-25 % and 4-6 % in high-fidelity modeling. Based on experiences achieved in this design case both of these modeling approaches were justified. Low-fidelity model can be seen especially important in early design phase when design alternatives were speculated with design constrains. High-fidelity model was useful on detailed design when dynamic properties of the system were considered more detailed.

Keywords: Early design phases, product modelling, simulation

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SIG Workshop - March 2013 - 1