摘要
以相空间重构理论为基础 ,利用延时法对水下噪声时间序列信号进行了相空间重构 ;在重构的相空间中分析了舰船辐射噪声的非线性特性 ,利用相似序列重复度这一参数 ,绘制了舰船辐射噪声RPT曲线并分析了其非线性特性 ;通过对实测数据的计算表明 ,在重构相空间中辐射噪声具有不同于高斯白噪声和确定性信号的几何特性 ,不同类型目标具有可分性 ,能为水声目标识别提供一种新的思路。
Time delay method is used to reconstruct the phase space of underwater noise time series based on nonlinear dynamics theory. In this paper, how to determinate those parameters of the time delay methed have been studied. In the phase space, by using of the similar sequence repeatability(RPT) and plotting the RPT curves it proved the nonlinear characteristics of the underwater noise. From these results it can draw some conclutions and provide new idea for the nonlinear analysis of the underwater acoustic targets.
出处
《船海工程》
2003年第6期4-7,共4页
Ship & Ocean Engineering
