摘要
以相空间重构理论为基础，用TAKENS延时法对时序序列进行相空间重构，在超维相空间中研究舰船辐射噪声的非线性特性，利用相似序列计算出空间轨迹点与其自身的重复度（RPT）参数，绘制了舰船辐射噪声重复度曲线并分析其非线性特性。结果表明，在超维相空间中，舰船辐射噪声表现出具有界于随机的高斯白噪声和确定性的LORENZ吸引子之间的空间几何特性。并且同类目标之间具有相似性，不同类目标之间具有可分性，本文所提出的方法为水声目标的非线性研究开辟了一个新的途径．
In this paper, time delay method is used to reconstruct the phase space of time series based on takens phase space reconstruction theory. in the hyper dimensional phase space) we study the nonlinear characteristics of the time series. the similar sequence repeatability(rpt) of the phase space trajectory comparing itself is calculated and the rpt curves are plotted. the result proves that the ship radiated noise shows some geometric property between the stochastic gause noise and deterministic lorenz attractor. the rpt curves of same target show some similarity and different targets show some different characteristic as well. the method proposed ill this paper provides a new way for the non-linear analysis of the underwater acoustic targets.
出处
《声学学报》
EI
CSCD
北大核心
1999年第1期12-18,共7页
Acta Acustica
基金
国家自然科学基金
