Torpedo ; underwater acoustic imaging ; complex array ; azimuth resolution

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Double targets ; acoustic homing torpedo ; salvo ; feasibility

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In order to reduce calculation in the process of vertical scale identification of torpedo acoustic image,we present an improved decoherent multiple signal classification method based on quadrature complex sampling which suits to estimating the vertical highlights of submarine with the characteristics of near distance and coherent signals .

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Therefore,the application of space-time adaptive optimization method to active acoustic homing torpedo is studied, and the conventional method is improved by restraining the side lobe reverbereration and main lobe reverberation with self Doppler null method.

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HLA ; torpedo acoustic homing system ; simulation platform ; FOM/SOM

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This method is based on the Snell law of acoustic propagation in water. Different velocity gradients among linear layers in water are utilized to draw the sound ray chart, and a mathematical model of the geometric operational range is built. Furthermore, the geometric homing range is predicted with sound ray density, a prediction system of geometric operational range for acoustic homing torpedo is designed and the function of the system is realized through a system software. The sea trial demonstrates the prediction validity of the system.

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For the active acoustic fuze for a torpedo on the basis of the distance measurement done by using acoustic pulses, the echo of a randomly undulating wave is a main disturbance to recognize a surface ship.

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Torpedo ; acoustic image ; scale identification ; target highlights ; direction of arrival estimation ; decoherent multiple signal classification method

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Wake acoustic homing torpedo ; trajectory optimization ; endurance loss ; hit probability ; counter-countermeasure

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The results show that the simulation system is reasonable, reliable and of high precision, and the shallow water control scheme for the aerial torpedo can completely ...

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