Automatic gain control for the uniform amplitude of interferent signal in a Laser Doppler Vibrometer

The amplitude variation of the interferent signal can be caused since the object surface is uneven and the reaction 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 elimi...

Full description

Saved in:
Bibliographic Details
Published in2006 SICE-ICASE International Joint Conference pp. 1085 - 1090
Main Authors Seonggu Kang, Hyunseung Choi, Heesun Yoon, Kyihwan Park
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2006
Subjects
Automatic control
Automatic gain control
Bandwidth
Demodulation
feedforward algorithm
Frequency
Gain control
interferometer
Laser Doppler Vibrometer
Laser feedback
Optical interferometry
Robustness
Signal processing algorithms
Vibrometers
Online AccessGet full text

Cover

More Information
Summary:The amplitude variation of the interferent signal can be caused since the object surface is uneven and the reaction 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, two kinds of analog feedforward automatic gain control (AGC) which have more simple structure and higher bandwidth than that of the feedback method are proposed. Electronic circuits are constructed to implement the proposed AGC algorithms. The brief analysis, the measurement scheme of the system, and the experimental results of the AGCs using a laser Doppler vibrometer are presented. They demonstrate that the proposed AGCs are proven to make the system robust to the amplitude variation of the interferent signal
ISBN:9788995003848
8995003847
DOI:10.1109/SICE.2006.315817