项目名称: 基于现代信号处理的高速列车辐射噪声分析
项目编号: No.61271007
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 无线电电子学、电信技术
项目作者: 刘增力
作者单位: 昆明理工大学
项目金额: 60万元
中文摘要: 随着列车运行速度的不断提高,其运行时产生的辐射噪声,对周围环境的影响愈来愈大,是环境的重要污染源并且日趋得到人们的关注。对高速列车辐射噪声分析的目的在于研究其噪声产生机理,准确定位其主要噪声源,为设计低噪声及低振动级的高速列车提供依据。希尔伯特-黄变换(HHT)是近年提出的用于非平稳过程分析的新方法,循环平稳信号处理的方法也是用于对具有周期特征的非平稳信号进行分析的一个有力工具,而高速列车辐射噪声是典型的非平稳信号,因此,本研究拟结合信号处理的经典理论,依据仿真数据及实际测试数据,运用现代信号处理的方法分析高速列车的辐射噪声特征,达到科学地评价和应用HHT及基于循环平稳信号处理的盲源分离技术的目的。本研究优势:①针对水下运动目标辐射噪声所采用的傅里叶变换、小波变换和HHT所积累的经验并且获得过国防科技进步奖②现拥有多套高性能数据采集测试设备。本项目具有较强学术创新性及前瞻性,应用前景广阔。
中文关键词: 辐射噪声;高速列车;现代信号处理;;
英文摘要: With the continuous improvement of train speed,the radiated noise generated in the run-time,is making bigger and bigger impact on the surrounding environments.It is an important source of pollution of the environment and the increasingly get people's attention. High-speed trains radiated noise analysis aims to study the noise generation mechanism,accurate positioning of the main noise source,provide the basis for the design of low noise and low vibration level high-speed train. Hilbert-Huang transform (HHT) is a new method recently proposed to analyze non-stationary processes,and cyclostationary signal processing method is a powerful tool for the analysis of non-stationary signals with cycle characteristics. The radiated noise of high-speed train is typical non-stationary signals,therefore, this study intends to combine the classical theory of signal processing,based on simulated data and actual test data, the use of modern signal processing methods to analyze the radiated noise characteristics of high-speed train to reach the purpose of the scientific evaluation and application of HHT,and blind source separation technology based on cyclostationary signal processing. The advantage of this study: ①For underwater moving target radiated noise using the Fourier transform, wavelet transform and HHT accumulated expe
英文关键词: radiated noise analysis;high-speed trains;modern signal processing;;