基于电磁引信原理的鱼雷过靶距离测量方法

摘要

针对当前鱼雷过靶距离的测量方法普遍采用被动测距,且存在操作不便、解算模型复杂和测试精度低等问题,提出了一种基于电磁引信原理的鱼雷过靶距离的测量方法,分析了电磁引信的主动测距原理,建立了相位特征与过靶距离的解算模型,给出了基于二分法原理的过靶距离数值求解过程,最后对本文提出的方法进行了水池试验.实测数据表明,在电磁引信的收发天线与目标(钢板)的距离为0.8～1.5 m的条件下,绝对测距精度小于0.02 m,相对测距精度小于2.5％,证明了该方法测试精度高且易于实现,具有较好的工程应用前景.%For detection and recognition of the laser wake of a surface ship, a novel method for detecting the wake backscattering signal by making use of the wavelet package energy feature vector is presented. An adaptive noise canceller based on variable forgivable factor is designed to filter the backscattering signal and system noise, so as to effectively select the target signal. The wave package energy feature vector is extracted by using wavelet package decomposition method and different energy formation of frequency range. The dimension of the feature vector is reduced with the principal components analysis method. Experimental results show that the proposed method can effectively recognize the features of different wake backscattering signals of a surface ship.