摘要
根据舰船辐射噪声的时域序列波形的特点，对其数据序列本身的局部相似性进行了研究．首先进行了相空间重构（维数为５，１０，２０，３０，５０）．接着在此相空间基础上，利用相似序列计算出重复度（ＲＲＰＴ）参数，绘制了舰船辐射噪声的重复度曲线并分析其特征．最后利用ＲＲＰＴ参数提取了数据序列的熵信息．实验表明重复度曲线和熵信息较好地反映了舰船辐射噪声的时域特征．
The local similarity of ship radiated noise data is studied based on the temporal characteristic of time series itself. First, the phase space is constructed using time delay approach(the dimension is 5, 10, 20,30,50, respectively). Then, in the phase space, the similar sequence repeatability is calculated by comparing the reference sequence with the phase space point vector. The repeatability(RPT) curves of the ship radiated noises are drawn and their features are analyzed. Finally the entropy of the RPT parameter of the ship radiated noise is extracted. The experiment results show that the RPT curves and entropy can better reflect the time domain characteristics of the ship radiated noise and can be applied as a new evidence in the underwater acoustic target recognition.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
1998年第6期17-23,共7页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金
