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Journal Articles Acta Acustica united with Acustica Year : 2004

Different Least Squares Approaches to Identify Dynamic Forces Acting on an Engine Cylinder Block

Q. Leclere
Charles Pezerat
Bernard Laulagnet
Laurent Polac
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Abstract

This paper presents and compares two different least squares (LS) approaches to identify the dynamic forces acting on a structure from acceleration measurements. An overview of different papers dealing with such inverse problems is realized in the introduction. An original technique based on weighting LS is suggested to improve the classical method in the case of complex structures showing heterogeneous stiffnesses. This technique is applied to an experiment realized on an engine cylinder block. A second LS technique, known as total LS (TLS), is presented and adapted to the indirect force measurement problem by the means of the principal component analysis (PCA). Both Weighted LS and Weighted TLS approaches are compared in a theoretical way and in the frame of the experiment on the engine cylinder block.
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hal-00562466 , version 1 (03-02-2011)

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  • HAL Id : hal-00562466 , version 1

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Q. Leclere, Charles Pezerat, Bernard Laulagnet, Laurent Polac. Different Least Squares Approaches to Identify Dynamic Forces Acting on an Engine Cylinder Block. Acta Acustica united with Acustica, 2004, 90, pp.285-292. ⟨hal-00562466⟩
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