Application of time‐frequency analysis to landmine detection using a laser Doppler vibrometer

2000 ◽  
Vol 107 (5) ◽  
pp. 2829-2829 ◽  
Author(s):  
Vincent Valeau ◽  
James Sabatier ◽  
Ning Xiang
Keyword(s):  
Frequency Analysis ◽  
Laser Doppler Vibrometer ◽  
Landmine Detection ◽  
Laser Doppler ◽  
Time Frequency Analysis ◽  
Time Frequency

Time-frequency analysis of laser doppler radar vibration signals

2020 ◽  
Vol 13 (5) ◽  
pp. 1014-1022
Author(s):  
CHEN Hong-kai ◽  
◽  
WANG Ting-feng ◽  
WU Shi-song ◽  
LI Yuan-yang ◽  
...  
Keyword(s):  
Frequency Analysis ◽  
Doppler Radar ◽  
Laser Doppler ◽  
Vibration Signals ◽  
Time Frequency Analysis ◽  
Time Frequency

Time-Frequency Analysis of Slider Dynamics and the Effect of Lubricant

2004 ◽  
Vol 126 (3) ◽  
pp. 559-564 ◽  
Author(s):  
Saurabh K. Deoras ◽  
Frank E. Talke
Keyword(s):  
System Identification ◽  
Frequency Analysis ◽  
Laser Doppler ◽  
Air Bearing ◽  
Lubricant Thickness ◽  
Laser Doppler Vibrometry ◽  
Time Frequency Analysis ◽  
Identification Methods ◽  
Time Frequency ◽  
Damping Coefficients

The dynamics of pico sliders is investigated during scratch impact using laser Doppler vibrometry. Air-bearing frequencies and damping of the pitch-2 frequency are studied as a function of disk velocity for lubricant thickness values of 1.6 nm, 1.0 nm and 2.0 nm. Time-frequency analysis is performed to study the instantaneous air-bearing frequencies. System identification methods are used to model the response of the slider after a scratch impact. The results indicate that the slider dynamics and the damping coefficients are affected by the disk velocity and lubricant thickness and also possibly by disk micro-waviness.

Time-Frequency Analysis of Partial Discharge Phenomena in SF6 gas using Wavelet Transform

1997 ◽  
Vol 117 (3) ◽  
pp. 338-345 ◽  
Author(s):  
Masatake Kawada ◽  
Masakazu Wada ◽  
Zen-Ichiro Kawasaki ◽  
Kenji Matsu-ura ◽  
Makoto Kawasaki
Keyword(s):  
Wavelet Transform ◽  
Frequency Analysis ◽  
Partial Discharge ◽  
Time Frequency Analysis ◽  
Time Frequency
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