A4 Conference proceedings

Experimental Investigation of Noise Sources Inside an Underwater Robot's Buoyancy Variation System


Open Access publication

Publication Details
Authors: Gafurov Salimzhan, Salmina Vera, Greshnyakov Pavel, Reshetov Viktor, Mukhametzyanov Andrey, Handroos Heikki
Publication year: 2017
Language: English
Related Journal or Series Information: Proceedings of the International Congress on Sound and Vibration
Title of parent publication: Proceedings of the 24th International Congress on Sound and Vibration
Start page: 1
End page: 8
Number of pages: 8
ISBN: 978-1-906913-27-4
JUFO-Level of this publication: 0
Open Access: Open Access publication

Abstract

Nowadays unmanned underwater gliders have become to play a vital role in ocean exploration and allow to obtain the valuable information about underwater environment. Underwater glider is moved by chang-ing its buoyancy. Buoyancy variation system is the key system that determines the accuracy of robot motion, submersion capability, acoustic properties, reliability and resource. These parameters are deter-mined by working process inside buoyancy variations systems, particularly by occurred pressure pulsa-tions. Pressure pulsations are known to determine vibrations and, as a result, air borne noise. There are five possible types of buoyancy variation systems that can be implemented in gliders. All of them were considered in this paper theoretically. Theoretical analysis showed their advantages and disadvantages and allowed to choose the most effective. Chosen buoyancy variation systems consist of hydraulic pumps, electro motors, valves and accumulators. Buoyancy variation systems were investigated exper-imentally in several glider operational modes: dive mode, ascent mode, and the mode of emergency ascent. Semi-natural test bench was used for experimental tests. Six vibration acceleration sensors were used for vibration estimation. They were installed on each aggregate of the system. Obtained data was sampled via the LMS hardware and software equipment. Results allowed us to investigate the vi-broacoustic efficiency of glider buoyancy variation systems by means of their vibration accelerations and noise that were caused by pressure pulsations on different operating regimes.


Last updated on 2018-19-10 at 07:55