E-006

Optimal reconstruction of mode shapes using nonuniform strain sensor spacing

Authors: Eva Dyllong, Andreas Kreuder
Affiliations: Gerhard-Mercator-University of Duisburg, SFB 291

Abstract
In this paper, a theoretical and practical technique for the reconstruction of the static and dynamic deflection curves of a cantilever beam with one free end is presented. In practice a limited number of strain sensors is used, so the sensor layout is important for the accuracy of the result. A new approach for finding an optimized number and placement of FBG strain sensors is described, and it is shown that five well placed readings suffice to precisely reconstruct the modes up to the 3rd which are significant in lots of applications. The method is validated by comparing dynamic shape estimations with experimental results.

Eva Dyllong
Gerhard-Mercator-Universitaet -GH Duisburg
Fachbereich Mathematik / Informatik II
Lotharstr. 65
D-47048 Duisburg / Germany
Raum LF 260
Tel. ++49 203 379 2194
Fax. ++49 203 379 3557
dyllong@informatik.uni-duisburg.de