Industrial and Materials Science

Geometry Assurance & Robust Design

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Smartpad in a factory

The research group Geometry Assurance & Robust Design focus on the whole product realization process, from concept to production. The core competence in this group is within assembly modelling and analysis, robust locating system design, variation simulation, visualization, tolerance optimization, inspection preparation and use of inspection data for product and process control.

Geometry Assurance is the set of activities that aims to minimize the effect of geometrical variation in the final product. The Geometry Assurance & Robust Design research group works in all product realization phases:

In the concept phase the product and the production concepts are developed. In this phase, the concepts are optimized with respect to locator robustness and verified against an assumed production system by statistical tolerance analysis. The visual appearance of the product is optimized and product tolerances are allocated down to part level using variation simulation and sensitivity analysis.

In the pre-production phase the product and the production system are physically tested and verified. Adjustments are made to both the product and the production system to correct errors and prepare for full production. In this phase inspection preparation and off-line programming of coordinate measurement machines and scanning equipment take place. Inspection preparation and optimization of inspection points are supported by the use of statistical cluster analysis.

In the production phase all production process adjustments are completed and the product is in full production. Focus in this phase is on how to use inspection data to control production and to detect and correct errors. Lately simulation models, developed and used for tolerance analysis in the concept phase, have been fed with real time data to serve as digital twins. Here, selective assembly, automatic fixture adjustment and joining sequence optimization have been shown to reduce geometrical variation with up to 50%.

Ongoing research projects

The research group

Rikard Söderberg

  • Full Professor, Product Development, Industrial and Materials Science

Lars Lindkvist

  • Associate Professor, Product Development, Industrial and Materials Science

Kristina Wärmefjord

  • Professor, Product Development, Industrial and Materials Science

Andreas Dagman

    Casper Wickman

    • Researcher, Product Development, Industrial and Materials Science

    Vaishak Ramesh Sagar

    • Researcher, Product Development, Industrial and Materials Science

    Roham Sadeghi Tabar

    • Postdoc, Product Development, Industrial and Materials Science

    Adam Lindkvist

    • Postdoc, Product Development, Industrial and Materials Science

    Alf Andersson

    • Full Professor, Product Development, Industrial and Materials Science

    Johan Lööf

    • Researcher, Product Development, Industrial and Materials Science

    Johan Vallhagen

    • Researcher, Product Development, Industrial and Materials Science

    Johan Carlson

    • Projectleader Research, Product Development, Industrial and Materials Science

    Soner Camuz

    • Doctoral Student, Product Development, Industrial and Materials Science

    Hugo Hultman

    • Doctoral Student, Product Development, Industrial and Materials Science

    Diogo Jundi Toyoda

    • Doctoral Student, Product Development, Industrial and Materials Science

    Elham Rekabi Bana

    • Doctoral Student, Product Development, Industrial and Materials Science

    Abolfazl Rezaei Aderiani

    • Doctor, Product Development, Industrial and Materials Science

    Samuel Lorin, PhD, FCC
    Cristoffer Cromvik, PhD, FCC
    Mikael Rosenqvist, PhD student
    Marx Raghu Raja, PhD Student
    Björn Lindau, industrial PhD student (VCC)

    PhD alumni from the Geometry Assurance & Robust Design Group