机械信号时域平均消噪方法的滤波器实现

发布时间：2018-03-16 12:54

本文选题：时域平均方法　切入点：多功能滤波　出处：《振动与冲击》2017年21期 　论文类型：期刊论文

【摘要】：时域平均法是故障诊断中常用的非常有效的信号处理方法,主要特点是可以从混有噪声干扰的信号中提取感兴趣的周期性信号,同时抑制不相关的其它周期成份。然而时域平均存在两方面明显的不足:一方面,键相信号的拾取常受到应用环境和条件的制约难以实施,即便获得键相信号,也往往由于周期截断误差的存在使时域平均方法不能取得满意的效果;另一方面,时域平均要求大量数据的存储、运算,这给时域平均的应用也带来一定的不便。为了解决上述问题,本文根据时域平均的幅频特性提出采用FIR多带滤波器实现时域平均功能的方法,该法有效避免了传统方法需采集键相信号的不足,很好的扩大了时域平均在实际工程中的应用。最后,将传统的时域平均方法和利用多带滤波器实现时域平均功能的方法进行了分析比较,验证了本文方法的有效性。
[Abstract]:The time domain average method is used in fault diagnosis of the signal processing method is very effective, the main feature is mixed with periodic signal extraction from the signal of interest in noise, while suppressing other periodic components not relevant. However the time domain average there are two shortcomings obvious: on the one hand, restricting the pickup key phase signal the application environment and conditions are often difficult to implement, even to obtain the Keyphasor signal, often because of the existence of periodic truncation error to time domain averaging methods cannot obtain satisfactory results; on the other hand, the average time required large amounts of data storage, computing, the application of time domain average also brought some inconvenience. In order to solve the above problems and according to the frequency characteristic of time averaging method is proposed in this paper using FIR multi band filter to realize time domain average function, this method can effectively avoid the traditional method of collecting key phase signal The shortage of time domain extends the application of time domain averaging in practical engineering. Finally, the traditional time domain averaging method and the method of realizing the time domain average function by using multi band filter are compared and analyzed, and the effectiveness of the method is verified.

【作者单位】：浙江海洋大学船舶与海洋工程学院;浙江省近海海洋工程技术重点实验室;浙江金鹰集团股份公司;
【基金】：国家自然科学基金面上项目(51379189) 中央财政支持地方高校发展专项海洋工程装备创新团队浙江省科技厅重大专项社会发展项目(2013C03031)
【分类号】：TN713

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