鱼雷发电机噪声对自导系统的干扰及其抗干扰技术

Influence of Noise from Torpedo Electric Generator on Homing System and Countermeasures

针对热动力鱼雷噪声高的问题,探讨了发电机噪声对鱼雷航行自噪声的影响,通过频谱分析和模拟试验等方法,找出了雷内电源的输出噪声源自发电机,并通过电源线、地线以及自导发射机泄漏到自导收发转换电路而进入接收机,分析了发电机噪声的特性以及对自导作用距离的影响机理,提出了改进收发隔离电路设计以提高阻断噪声能力和电源滤波的抗干扰措施。试验表明,采取抗干扰措施后可抑制噪声10～20 dB,使鱼雷自导作用距离达到一个新水平,同时可降低被动自导虚警概率,改进了自导系统性能,提高了其工作可靠性。

This paper discusses the influence of noise from an electric generator on torpedo self noise with regard to high noise of thermal power torpedo. The output noise of built-in power source is generated from the electric generator, and verified by spectrum analysis and analogue test. The noise enters the receiver from the converting circuit of homing receiver and transmitter through cables, ground wire and the homing transmitter. The characteristic of the noise and its influence mechanism on homing range are analyzed. The countermeasures to improve circuit design for receiving and transmitting isolation are proposed to enhance the ability of blocking noise and filtering power source. The test results show that the countermeasures can restrain the noise by 10dB to 20dB to increase the homing range to a new level, and reduce the probability of false alarm in passive homing to improve the performance of homing system and to increase the reliability of homing system operation.