Measurement of trajectories of piezoelectric actuators with laser Doppler vibrometer
JOURNAL OF VIBROENGINEERING(2011)
Abstract
Various measurement techniques have been developed for analyzing performance of piezoelectric devices. Recently laser Doppler vibrometer (LDV) has become a widely applied instrument for vibration measurements both in scientific studies and industry. The most common type of LDV is a single-point vibrometer. In this article we propose a system consisting of the single-point LDV, beam deflector and mirrors, which enable automated 2D/3D trajectory or 2D vibration measurements, where a high number of target points can be measured with a very high spatial resolution. We used two test objects to demonstrate the performance of the system: piezo-actuator, which transforms vibrations to the rotational movement and a micrometric screw with piezo-adjustment.
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Key words
trajectory measurement,piezo-actuator,laser Doppler vibrometer
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