609 - Automatic gain control for the measurement of a flexible body motion using a Laser Doppler vibrometer
Choi H., Yeom W., Yoon H., Park K.
Abstract
The amplitude variation of the interferent signal can be caused in the flexible body motion since the object surface is uneven and the reflection angle can be varied according to the object motion. The amplitude variation causes an error in the signal processing algorithm. This error distorts the output signal. In order to eliminate this dependence of the interferent signal on the amplitude variation, an automatic gain control (AGC) is proposed. Electronic circuit is constructed to implement the AGC algorithm. The brief analysis, the measurement scheme of the system, and the experimental results of the AGC using a laser Doppler vibrometer are presented. They demonstrate that the proposed AGC is proven to make the system robust to the amplitude variation of the interferent signal in the flexible body motion.
Citation
Choi H.; Yeom W.; Yoon H.; Park K.: Automatic gain control for the measurement of a flexible body motion using a Laser Doppler vibrometer, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7
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