基于时-频峰值滤波的车辆振动信号随机噪声消减技术研究

英文篇名：Research on the Random Noise Elimination and Reduction Technology for Vehicle Vibration Signals on the Basis of Time-Frequency Peak Value Filtering
中文刊名：铁道车辆
英文刊名：Rolling Stock
作者：倪胜义
英文作者：NI Sheng-yi (National Railway Department of CSR Qingdao Sifang Locomotive & Rolling Stock Co. ; Ltd. ; Qingdao 266111 ; China)
中文关键词：车辆 ; 振动信号 ; 时-频峰值滤波 ; 噪声消减
英文关键词：vehicle ; vibration signal ; time-frequency peak value filtering ; noise elimination and reduction
出版日期：2010-06-10
机构：南车青岛四方机车车辆股份有限公司国铁事业部;
年：2010
期：06
出版单位：铁道车辆

摘要

在时-频峰值滤波理论的基础上,提出了振动信号的噪声消减模型和误差控制方法,构建了信号估计误差与窗函数最大长度的关系。在许可估计误差为2%的情况下,对车辆实际线路动力学试验采集得到的振动信号进行噪声消减处理,结果表明,时-频峰值滤波能够很好地消减噪声,增强信号,是一种能有效消减振动信号中随机噪声的滤波方法。
Based on the time-frequency peak value filtering theory,the noise elimination and reduction model and error control method for vibration signals are given,the relation between the estimated error of signals and the maximum length of window function is set up.The vibration signals collected in the dynamics testing of vehicles in the field are processed with noise elimination and reduction,while the estimated permissible error being 2%.The result shows that the time-frequency peak value filtering can eliminate,reduce noise and increase the signals effectively.It is a filtering method that can efficiently eliminate and reduce the random noise in the vibration signals.

引文

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