摘要
潜艇和鱼雷等水中目标都是良好的水下辐射声源。辐射噪声中的线谱,由于它常常和某些周期性往复振动的声辐射部件相联系,并且线谱的频率低,传播距离远。是现代声呐设备探测和捕捉的重要对象,因此对线谱的研究引起人们不衰的兴趣。本文从研究线谱分析方法入手,对长期关心的水下运动目标辐射噪声平稳化问题进行了研究,提出了一种平稳化处理模型,从而解决提高线谱分辨率问题。在此基础上,对平稳化以后的数据进行较长时间的线谱跟踪,本文给出了一种利用单只水听器即可对目标进行测距的模型及实际水下目标数据分析的实例。
Scientists are interested in studying the line spectrum radiated from submarines, torpedoes and other underwater targets for a long time. Since the line spectrum is closely linked with some radiation sound parts of periodic vibration and its low frequency makes sound propagation range longer, it becomes an important information to modem sonar equipment. How to get the stationary stochastic process from radiated noise of underwater moving targets is studied and the stationary model is given in the paper. By using this stationary model, the line spectrum can be analysed in higher frequency resolution and can be tracked for longer time. The ranging method with one hydrophone by the line spectrum tracking is introduced in this paper and some results obtained by data analysis of actual underwater targets are given in the paper also.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
1996年第1期38-44,共7页
Journal of Harbin Engineering University
