Functional Trade-offs in the Mechanical Design of Integrated Products - Impact on Robustness and Optimisability

Nökkvi S. Sigurdarson*, Tobias Eifler, Martin Ebro

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

It is generally accepted in industry and academia that trade-offs between functional design objectives are an inevitable factor in the development of mechanical systems. These trade-offs can have a large influence on the achievable robustness and performance of the final design, with many products only functioning in narrow sweet-spots between different objectives. As a result, the design process of multi- functional products can be prolonged when designers concurrently attempt to find sweet-spots between a number of potentially interdependent trade-offs. This paper will show that designers only have six different approaches available when attempting to manage a trade-off while trying to ensure robustness and a sufficient performance. These fall within one of three categories; accept, optimise, or redesign. Selecting the wrong approach, can result in consequences downstream which can be difficult to predict, amongst others a lack of robustness to geometric variation, constrained performance, and long development lead time. This points to a substantial potential in the synthesis of design methods that support the identification and management of trade-offs in early product development.
Original languageEnglish
Title of host publicationProceedings of the Design Society: 22nd International Conference on Engineering Design (ICED19)
EditorsSandro Wartzack, Benjamin Schleich
PublisherCambridge University Press
Publication date2019
Pages3491-3500
DOIs
Publication statusPublished - 2019
Event22nd International Conference on Engineering Design (ICED19) - Delft, Netherlands
Duration: 5 Aug 20198 Aug 2019

Conference

Conference22nd International Conference on Engineering Design (ICED19)
CountryNetherlands
CityDelft
Period05/08/201908/08/2019
SeriesProceedings of the International Conference on Engineering Design
ISSN2220-4342

Bibliographical note

This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.

Keywords

  • Robust design
  • Embodiment design
  • Optimisation
  • Design trade-offs

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