Technology Systems
Thursday 11th November 2010, 1100hrs–1200hrs
Chaired by George Zvara Advances in Sonar Dome Materials and Manufacturing to Improve Undersea Warfare Performance and Reduce Total Ownership Cost Dr. Thomas Stottlemyer, Naval Undersea Warfare Center (Division Newport), United States Dr. Anthony Caiazzo, Materials Sciences, Inc., Horsham, PA, USA A unique partnership between the U.S. Navy and Industry has led to promising advances in sonar system development and fielding, by introducing structurally robust, low acoustic insertion loss composite sonar domes, that are candidates for replacement of current Sonar Dome Rubber Windows. This paper will present information on recent advances in composite materials and manufacturing techniques that have led to the development of sonar domes, which will improve Undersea Warfare performance while reducing Total Ownership Cost (TOC). Prototype sonar domes have been fabricated and tested for high-frequency and mid-frequency active sonar systems, and a first production article has recently been completed and tested in preparation for installation on a U.S. Navy Destroyer. The paper will then discuss the composite materials used, provide an overview of the manufacturing process, outline the extensive testing program that was undertaken, and present near-term and long-term cost savings that are expected to be delivered by this relatively new technology. Underwater Channel Adaptive OFDM Communication Strategy Dr Lei Wang, Institute of Acoustics, Chinese Academy of Sciences, China Using a UUV with acoustic or optical imaging is the most effective way against the low-tech acoustic remote-controlled exploders by terrorists. By transferring the real-time image data information back to the commander ship, bombs will be detected as early as possible. In order to transfer reliably the image data with high bit rate under different and time-varying littoral environments, this paper will propose a new channel-adaptive acoustic communication strategy, which obtains CSI (channel state information) at receiver by pilot-CSI-estimation, and transfers data in multiple bit rate according to the feedback information at transmitter, based on OFDM high speed modulation technology. The simulation is also contained to test the performance of the acoustic communication system based on ray-propagation model in shallow water. Numerical simulation results show that the proposed communication strategy is much more effective than ordinary OFDM communication in scale-altering acoustic channel.
MAST timetable
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Diamond Industry Patron
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Commander Graeme Roger
Director, Major projects, Maritime HQ, Royal Australian Navy
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