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Load Identification Using a Modified Modal Filter Technique

Department of Robotics and Mechatronics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland (mendrok@agh.edu.pl)

^* To whom correspondence should be addressed.

	Abstract

In this paper the authors propose a modification to the known force identification procedure based on modal filtration. The modification consists of replacing the modal vectors with the Ritz vectors. The latter seem to be more accurate because they take into account the static deformation of the structure and are less sensitive to truncation error. After the main idea- the algorithm modification- is presented, it is verified and then compared with the original solution. Two sets of data are used for this purpose, firstly simulation data from the numerical model, and then physical data recorded during a laboratory experiment.

Key Words: Force identification, modal analysis, modal filter, Ritz vectors.

First published on May 7, 2009
Journal of Vibration and Control 2009, doi:10.1177/1077546309103274


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