SUBMARINE SONAR WET END DEVELOPMENT in ASELSAN Muhammed N. enlik , - PowerPoint PPT Presentation

SUBMARINE SONAR WET END DEVELOPMENT in ASELSAN Muhammed N. Şenlik , Erdem Çağatay, Ömer Özdemir, Osman Yalçınkaya, Kerim Çepni, Aykut Şahin Defence Systems Business Sector , ASELSAN Inc. #UDT2019

Outline • Motivation • Review of the Models - Pulse - Echo Measurement - Near- Field Methods • Test Setup - Equivalent Circuit - Actual Measurements #UDT2019 • Summary

Motivation • Half Life- Cycle Full Modernization Phase of Preveze Class Submarine - Operating Frequency < 10 kHz, Characteriza < 1 kHz #UDT2019

Review - Pulse - Echo Measurement ; sufficient depth to discriminate the direct and echo signal P. A. Levin, Calibration of hydrophones , B & K Technical Review, 3 – 17 (1973) #UDT2019

Review - Defence Research Lab (DRL) Method ; Number of measurement points is high R. J. Bobber , Underwater electroacoustic measurements , Peninsula Publishing , Los Altos, 1988 #UDT2019

Review - Trott Method ; Preciese alignmet of projectors R. J. Bobber , Underwater electroacoustic measurements , Peninsula Publishing , Los Altos, 1988 #UDT2019

Test Setup - ODTU Yalıncak Facility, in Ankara, close proximity of ASELSAN ; #UDT2019

Test Setup - ODTU Yalıncak Facility, in Ankara, close proximity of ASELSAN ; Reference Projector & Hydrophone - Neptune D11 & Neptune D140H #UDT2019

Test Setup – Equivalent Circuit #UDT2019

Test Setup – Equivalent Circuit - Projector & Hydrophone -> Spherical - Projector -> PZT–4 - Hydrophone -> PZT-5H #UDT2019

Test Setup – Reference Measurement - Pulse Width = 5 ms - Transient Response - Good Agreement #UDT2019

Actual Measurements - Transient Directional Hydrophone #UDT2019

Actual Measurements - RVS Directional Hydrophone #UDT2019

Summary - Low Frequency Chracterization . - Prior knowledge on behavior - Use of equivalent circuit - Suitable for characterization of output of mass production . #UDT2019