Towed Acoustic Countermeasures for Defending Acoustic Homing Torpedoes
The growing torpedo threat to ships and submarines demands effective countermeasures for defence. Detection, classification and localisation of an attacking torpedo is the first step towards launching effective countermeasures. Studies are on the rise to use the existing sonar systems to detect torpedoes and subsequently use countermeasures. The use of towed array sonar systems for torpedo detection and acoustic counter measures are the most recent and not reported much in open literature. This paper presents a modular acoustic counter measure approach using towed decoy against acoustic homing torpedoes. Describes the technologies and algorithms required for different modes of towed decoy, which is effective against both active and passive acoustic homing torpedoes. Towed decoy signal generation schemes and their realisation using digital signal processing hardware are outlined in this paper.
] N. K. Ramanarasaiah, Introduction to Torpedo Technology, DRDO Monogram Series-I, 1997.
] E. Ravi Kumar and S. Koteswara Rao, “Anti-Submarine / Ship Warfare (ASW): Tactical Assessment and Statistical System Analysis,” in International Conference on Systemises, Cybernetics and Informatics, Paper Identification number: CS 2.1, pp. 31–36, 2009.
] K. R. Akhil, D. Ghose and S. Koteswara Rao, “Optimizing Deployment of Multiple Decoys to enhance ship survivability,” in Proceedings of 26th American Control Conference (ACC) conducted by American Automatic Control Council (AACC), New York, USA, June 11–13, 2008, pp. 1812–1817.
] Kyung-Min Seo, Hae Sang Song, Se Jung Kwon and Tag Gon Kim, “Measurement of Effectiveness for an Anti-torpedo Combat System Using a Discrete Event Systems Specification-based Underwater Warfare Simulator,” J. of Defence Modelling and Simulation: Applications, Methodology, Technology, vol. 8, no. 3, pp. 157–171, 2011.
] Nathaniel J de Lautour and Mark Trevorrow, “Initial Study on Expendable Acoustic Countermeasures for Torpedo Defence,” DTA Report 341, 2012.
] Donald E. Knuth, The Art of Computer Programming, vol. 2, 3rd Ed., 1997, Massachusetts: Addison–Wesley, pp.17–19
] G. E. P. Box and Mervin E. Muller, “A Note on the Generation of Random Normal Deviates,” The Annals of Mathematical Statistics, vol. 29, no. 2, pp. 610–611, 1958.
] C. C. Tseng, S. C. Pei and S. C. Hsia, “Computation of fractional derivatives using Fourier transform and digital FIR differentiator,” Signal Processing, vol. 80, pp. 151–159, 2000.
] J. Tierney, C. M. Rader and B. Gold. “A Digital Frequency Synthesizer,” IEEE Transactions on Audio and Electro acoustics, vol. AU-19, no. 1, pp. 48–56, 1971.
] ADSP 2106X Reference Manual, Analog Devices, 2013.
] MPC7410/MPC7400 RISC Microprocessor Reference Manual, Rev. 2, Free scale Semiconductor, Oct 2008.
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