Full Body Optical Vibration Mapping fully automated
The idea of creating a automated measurement station for spatial objects took hold the Polytec engineers. Encouraged by their industrial Partner seeking for substantial reduction in processing time for experimental modal analysis (EMA), the automated RoboVib Structural Test Station was developed.
A 3-dimensonal Scanning Laser-Doppler Vibrometer PSV-400-3D is used as a measurement tool linked mechanically and by software to an industrial robot from KUKA. This intelligent link for the first time enables an EMA test fully embedded in the CAE data workflow. The Finite Element Model supplies the measurement locations, which are the matched to the actual object under test. Fully automated, the measurement runs over night with thousands of measurement points if required. As the results are acquired at the actual nodal points of the FE mesh, the model update and the validation of the FE model by means of the experimental data is now straight forward.
High resolution measurements – both, in frequency and space – can be performed in a hours instead of days, as the point density is not depending on the time consuming sensor mounting and cabling. Besides the increased efficiency, the results are no more influenced by mass and damping effects of the attached sensor. This has again a positive effect on the FE model validation.
Flexibility was the aim in developing the RoboVib Structural Test Station. Adding a linear axis to the robot or adding robots creates a test cell just fitting the application needs. The vibrational characteristic of a complete car body is be mapped in only some hours including set-up time.
The robotic laser vibrometry is the key to quick and accurate results in structural dynamics and NVH, accelerates development steps and guarantees a quick time to market.
A 3-dimensonal Scanning Laser-Doppler Vibrometer PSV-400-3D is used as a measurement tool linked mechanically and by software to an industrial robot from KUKA. This intelligent link for the first time enables an EMA test fully embedded in the CAE data workflow. The Finite Element Model supplies the measurement locations, which are the matched to the actual object under test. Fully automated, the measurement runs over night with thousands of measurement points if required. As the results are acquired at the actual nodal points of the FE mesh, the model update and the validation of the FE model by means of the experimental data is now straight forward.
High resolution measurements – both, in frequency and space – can be performed in a hours instead of days, as the point density is not depending on the time consuming sensor mounting and cabling. Besides the increased efficiency, the results are no more influenced by mass and damping effects of the attached sensor. This has again a positive effect on the FE model validation.
Flexibility was the aim in developing the RoboVib Structural Test Station. Adding a linear axis to the robot or adding robots creates a test cell just fitting the application needs. The vibrational characteristic of a complete car body is be mapped in only some hours including set-up time.
The robotic laser vibrometry is the key to quick and accurate results in structural dynamics and NVH, accelerates development steps and guarantees a quick time to market.
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