水中目标螺旋桨噪声调制信息动态建模及其精细特征提取研究

项目名称： 水中目标螺旋桨噪声调制信息动态建模及其精细特征提取研究

项目编号： No.61203271

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 史广智

作者单位： 中国人民解放军海军潜艇学院

项目金额： 25万元

中文摘要： (限400字)：水中目标辐射噪声蕴含的螺旋桨调制信息是目标类型、螺旋桨类型、桨数、叶片数、转速、不均匀流场及目标机动状态等诸多因素的反映，其特征提取及识别机理的理论研究是目标识别的基础性工作之一，在被动声纳目标识别中起到重要作用。本项目旨在对螺旋桨空化噪声调制信息精细特征提取、调制特性、调制信息动态模型及其识别机理开展深入的理论研究，为基于调制信息的被动声纳目标识别提供重要的理论基础。拟通过螺旋桨空化噪声调制特性研究，有效提取调制信息精细特征，建立调制信息动态模型，分析目标机动状态、螺旋桨工作状态、桨叶及不同桨间空化程度的不均匀性、桨间干涉等因素对调制信息精细特征的影响及其变化趋势的理论问题。并拟采用基于模型的特征提取和识别思路，将调制信息动态模型和调制信息精细特征相结合，研究基于模型匹配的调制信息精细分析方法，探索一条目标调制信息特征提取和识别的新途径。

中文关键词： 模型基特征提取；精细分析；调制线谱；特征基识别方法；数值模拟

英文摘要： The modulation information contained by underwater acoustic target propeller cavitation noise is of important value in the underwater target recognition, which is representation of target type, blade number, propeller number, axle-frequency, cavitation degree, target velocity, nonuniform wake flow and so on. The project aims to construct the recognition theory of modulation information, extract the fine feature of modulation information and research the late-model recognition technology, which provides the strong theory foundation and technology support for the underwater acoustic target recognition based on propeller modulation information. Firstly, the fine feature of modulation information are obtained effectively on the basis of modulation characteristic research. Secondly, the dynamic model of modulation information is built. Thirdly, the theory question is analyzed which is effected on target maneuver state, propeller operation state, interference of some propellers to modulation information. Moreover, the model-based technology is applied firstly to underwater acoustic target recognition. The fine analysis method carry out synthetical analysis of time-domain feature and frequency-domain feature obtained from target modulation information, which adopts the fine feature and the dynamic model of modulation i

英文关键词： Feature extraction based model；Fine analysis；DEMON line spectrum；Dynamic identification method based on target feat；Numerical simulation