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Inflow Noise Characteristics of the Sensor in Low Wave Number Region Using Transfer Function  

Park, Ji-hye (Department of Precision Mechanical Engineering, Graduate School, Andong National University)
Lee, Jongkil (Mechanical Engineering Education, College of Education, Andong National University)
Shin, Ku-kyun (Agency for Defense Development)
Cho, Chi-yong (Agency for Defense Development)
Publication Information
대한공업교육학회지 / v.34, no.1, 2009 , pp. 238-251 More about this Journal
Abstract
The noise itself that affects the sensor array is defined as the noise which happens in the place where the system is installed and the circumference noise which comes from the ocean. The array structure for detecting acoustic signal in the underwater effected turbulent layer flow noise. In this paper to design the conformal array spectral density function was introduced and several cases of flow induced noise which affect transfer function were simulated. Modified Corcos wall pressure model was used as turbulent boundary layer flow noise. The effect of noise has been reduced as integrated sum of transfer function has been reduced by decreasing elastomer thickness and density when kx is in low wave number area. Also the characteristics of transfer function by Corcos wall pressure displayed the product of frequency density function. This simulation results can be applied to the conformal array design in unmmaned underwater vehicle in the near future.
Keywords
Transfer function; Low wave number; Hydrophone; Inflow noise; Frequency density function;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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