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本文以国外某自导鱼雷为背景,研究其尺度识别的机理。分析表明,该声自导鱼雷双波束测向系统中鉴相输出信号的频谱结构依赖于目标尺度。近似为“点目标”的声干扰器信号具有窄的相位起伏谱;而作为延展目标的潜艇信号具有较宽的相位起伏谱。从而可以根据输出信号的相位起伏谱的宽窄来进行真假目标的识别。
In this paper, a foreign torpedo as a background to study the scale recognition mechanism. The analysis shows that the spectral structure of the phase-discriminating output signal in the dual-beam direction finding system of the acoustic self-piloting torpedo depends on the target scale. An acoustic jammer signal that is approximately a “point target” has a narrow phase fluctuation spectrum; whereas a submarine signal that is an extension target has a wide phase fluctuation spectrum. Therefore, the identification of the true and false targets can be performed according to the width of the phase fluctuation spectrum of the output signal.