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A Process Approach to Robust Design in Early Engineering Design Phases

Andersson, Peder (1996)
Abstract (Swedish)
Popular Abstract in Swedish

Robust konstruktion handlar om hur produkter skall konstrueras för att bli okänsliga mot oväntade störningar och variationer i t.ex. omgivningen under drift. Normalt har detta problem angripits med den sk. Taguchi-metoden, i vilken experiment utförs efter en viss metodik på en prototyp, varefter produktens beteende kartläggs och konstruktionsvariablerna väljs så att ett robust uppträdande hos produkten erhålls. Sett utifrån konstruktionsteorins horisont är detta angreppssätt ineffektivt. Arbetet med att göra produkten robust måste börja så tidigt som möjligt i konstruktionsprocessen för att minska riskerna för sena (=dyra) omkonstruktioner. I avhandlingen beskrivs hur en metodik för robust... (More)
Popular Abstract in Swedish

Robust konstruktion handlar om hur produkter skall konstrueras för att bli okänsliga mot oväntade störningar och variationer i t.ex. omgivningen under drift. Normalt har detta problem angripits med den sk. Taguchi-metoden, i vilken experiment utförs efter en viss metodik på en prototyp, varefter produktens beteende kartläggs och konstruktionsvariablerna väljs så att ett robust uppträdande hos produkten erhålls. Sett utifrån konstruktionsteorins horisont är detta angreppssätt ineffektivt. Arbetet med att göra produkten robust måste börja så tidigt som möjligt i konstruktionsprocessen för att minska riskerna för sena (=dyra) omkonstruktioner. I avhandlingen beskrivs hur en metodik för robust konstruktion i tidiga konstruktionsetapper kan se ut samt vilka krav som ställs på de ingående metoderna utifrån konstruktionsteorin. Ett antal exempel på lämpliga metoder att använda i processen ges också. (Less)
Abstract
The activity of robust design of mechanical products and how it can be accomplished in pre-prototype design phases, is discussed in this thesis. It is advocated that to be fully efficient and effective optimization of product robustness should commence already in the conceptual design phase. Moreover, since product optimization is a process, robust design should be perceived and implemented as a process too, and not as an isolated method. A process for robust design engineering is proposed, which is based on a Swedish design methodology devised by prof. Fredy Olsson (systematic design). Further, the concept of robustness is linked to a theory of machine systems.



Some traditional methods of robust design are reviewed and... (More)
The activity of robust design of mechanical products and how it can be accomplished in pre-prototype design phases, is discussed in this thesis. It is advocated that to be fully efficient and effective optimization of product robustness should commence already in the conceptual design phase. Moreover, since product optimization is a process, robust design should be perceived and implemented as a process too, and not as an isolated method. A process for robust design engineering is proposed, which is based on a Swedish design methodology devised by prof. Fredy Olsson (systematic design). Further, the concept of robustness is linked to a theory of machine systems.



Some traditional methods of robust design are reviewed and the recurring problems of noise identification and insufficient information about the magnitudes of noise sources' variations are discussed. Means to overcome these problems are proposed. A modified use of the error transmission formula is proposed in which analysis of interactions between design variables is facilitated, and it also allows preliminary analysis of systems' robustness properties irrespective of uncertainties regarding the variabilities of primary input and control variables. The requirements set on methods for robust design from the viewpoint of design science are formulated in seven hypotheses. Examples of suitable methods to be used in a robust design methodology are given. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Prof. Swift, Ken G., Dept. of Engineering Design and Manufacture, The University of Hull, UK
publishing date
type
Thesis
publication status
published
subject
keywords
design principles, error transmission, design methodology, product development, design for quality, mechanical engineering, design process, conceptual design, Robust design, system design, parameter design, Taguchi, Mechanical engineering, hydraulics, vacuum technology, vibration and acoustic engineering, Maskinteknik, hydraulik, vakuumteknik, vibrationer, akustik
pages
160 pages
publisher
Dept. of Machine Design, Lund Institute of Technology, P.O. Box 118, S-221 00 Lund, Sweden
defense location
M-huset, M:B, LTH
defense date
1996-12-20 10:15
external identifiers
  • Other:ISRN: LUTMDN/TMKT-96/1020-SE
ISBN
91-88536-04-1
language
English
LU publication?
no
id
92f363f2-02d8-4dfe-b090-7c249c0ea3db (old id 28878)
date added to LUP
2007-06-13 09:53:58
date last changed
2016-09-19 08:45:05
@misc{92f363f2-02d8-4dfe-b090-7c249c0ea3db,
  abstract     = {The activity of robust design of mechanical products and how it can be accomplished in pre-prototype design phases, is discussed in this thesis. It is advocated that to be fully efficient and effective optimization of product robustness should commence already in the conceptual design phase. Moreover, since product optimization is a process, robust design should be perceived and implemented as a process too, and not as an isolated method. A process for robust design engineering is proposed, which is based on a Swedish design methodology devised by prof. Fredy Olsson (systematic design). Further, the concept of robustness is linked to a theory of machine systems.<br/><br>
<br/><br>
Some traditional methods of robust design are reviewed and the recurring problems of noise identification and insufficient information about the magnitudes of noise sources' variations are discussed. Means to overcome these problems are proposed. A modified use of the error transmission formula is proposed in which analysis of interactions between design variables is facilitated, and it also allows preliminary analysis of systems' robustness properties irrespective of uncertainties regarding the variabilities of primary input and control variables. The requirements set on methods for robust design from the viewpoint of design science are formulated in seven hypotheses. Examples of suitable methods to be used in a robust design methodology are given.},
  author       = {Andersson, Peder},
  isbn         = {91-88536-04-1},
  keyword      = {design principles,error transmission,design methodology,product development,design for quality,mechanical engineering,design process,conceptual design,Robust design,system design,parameter design,Taguchi,Mechanical engineering,hydraulics,vacuum technology,vibration and acoustic engineering,Maskinteknik,hydraulik,vakuumteknik,vibrationer,akustik},
  language     = {eng},
  pages        = {160},
  publisher    = {ARRAY(0x87cfa28)},
  title        = {A Process Approach to Robust Design in Early Engineering Design Phases},
  year         = {1996},
}