Estmiation of Course Angle and Distance for High Speed Underwater Vehicles

It is important for anti-torpedo torpedo(ATT) to estimate the course angle and distance of high speed underwater vehicles so as to enhance the probability of successful interception. This paper discusses an estimation method for both active and passive sonar to detect incoming high speed underwater vehicles. The initial axial alignment method, the straight run of detection device and the two cycles method are adopted to precisely and quickly estimate course angle and distance. The presented formulae for describing the estimation process indicate that the mean square deviation of detection accuracy of target bearing from detection device should be no more than 0.1 degree. The simulation tests for the course angle and distance estimation under different speeds and distances are performed, and the results show that the ideal values are obtained when the course angle is less than 35 degree and the distance is greater than 700 meters. This estimation method could be a valuable reference for the research on the design of ATT detection device, the detection of underwater vehicle parameters, and development of interception me thod.