0
Research Papers

Using Morphing Techniques in Early Variation Analysis

[+] Author and Article Information
Ola Wagersten

Department 91360, PVÖSN 35,
Volvo Cars,
Göteborg SE-405 31, Sweden
e-mail: ola.wagersten@volvocars.com

Björn Lindau

Department 81720, PVÖSE 101,
Volvo Cars,
Göteborg SE-405 31, Sweden
e-mail: bjorn.lindau@volvocars.com

Lars Lindkvist

Department of Product and
Production Development,
Chalmers University of Technology,
Göteborg SE-412 96, Sweden
e-mail: lali@chalmers.se

Rikard Söderberg

Department of Product and
Production Development,
Chalmers University of Technology,
Göteborg SE-412 96, Sweden
e-mail: rikard.soderberg@chalmers.se

Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTING AND INFORMATION SCIENCE IN ENGINNERING. Manuscript received August 22, 2013; final manuscript received August 30, 2013; published online January 22, 2014. Editor: Bahram Ravani.

J. Comput. Inf. Sci. Eng 14(1), 011007 (Jan 22, 2014) (9 pages) Paper No: JCISE-13-1163; doi: 10.1115/1.4025719 History: Received August 22, 2013; Revised August 30, 2013

Today, in order to be competitive in a fierce global car market, higher demands are placed on the perceived quality (PQ) of the products. The end customer's visual impression of fit and finish are one of several factors influencing the overall PQ. When assessing the PQ of split-lines, the assumed geometric variation of the ingoing parts is an important prerequisite for trustworthy visualization and for correct judgments. To facilitate early decision making in conceptual phases, new demands are set on virtual tools and methods to support the engineers. In this study, a method for early evaluation of the impact of geometrical variation on PQ of split-lines is proposed. Starting from an exterior styling model, mesh morphing techniques have been used to distort the exterior model according to measurement data acquired in running production. Morphing techniques have also been used to adopt previous structural design solutions onto the new styling, in order to make an early assumption of the assembly stiffness. The used method is described and adopted in an industrial case. The study shows that the presented technique can be used to create continuous and correlated datasets. Non-rigid part behavior can be included in early PQ evaluations, even if the final detailed engineering design models do not yet exist.

Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Contributing factors to perceived quality of split-lines

Grahic Jump Location
Fig. 2

(a) Rigid variation simulation and (b) non-rigid variation simulation based on FEA

Grahic Jump Location
Fig. 3

Available data for early judgment

Grahic Jump Location
Fig. 4

Assembly variation analysis

Grahic Jump Location
Fig. 6

Example of preparation of contour shapes in the styling model

Grahic Jump Location
Fig. 7

Morphing to guess part deviation

Grahic Jump Location
Fig. 8

Morphing to guess shape of structural part

Grahic Jump Location
Fig. 10

Morphing direction divided into surface (white) and edge (black) components

Grahic Jump Location
Fig. 11

Distribution of the handles along the edge contour

Grahic Jump Location
Fig. 12

Part deviation modeling

Grahic Jump Location
Fig. 13

Color plots describing hood exterior part deviation after morphing

Grahic Jump Location
Fig. 14

Cumulative percentage of variation

Grahic Jump Location
Fig. 15

Result PCA-representation (a) Part normal mean and (b) part normal variation

Grahic Jump Location
Fig. 16

Color plots of unit displacement disturbance: (a) Morphed model and (b) engineering model

Grahic Jump Location
Fig. 17

Rendered visualization model for PQ assessment

Grahic Jump Location
Fig. 18

Simulated range versus production measurements

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In