小波阈值去噪法在高铁沉降观测数据处理中的应用研究

由于观测环境和设备等因素的影响,高铁沉降变形监测的数据与高铁桥墩真实的变形量有一定的误差。文中基于小波分析理论,利用小波去噪技术,对哈大高铁四平段累计沉降观测数据进行了去噪处理。针对已有传统硬阈值法和软阈值法的不足,提出了一种新的方法,该方法采用模糊控制滤波器对含噪信号进行预处理,从而降低白噪声的方差。实验结果表明,小波去噪合理有效,能够敏感识别观测噪声和有用信息,不需要待处理数据的先验知识,适合高铁沉降变形监测数据处理。该方法实现过程简单易懂,并能获得较好的相关系数。

Research on the Application of Wavelet Threshold Denoising Method in High-speed Rail Settlement Observation Data Processing

The data of high-speed rail subsidence deformation monitor has certain error with the real deformation of high-speed rail bridge pier,as affected by observation environment,equipment and other factors.In this paper,the author uses wavelet denoising technology to carry on denoising processing to cumulative subsidence observation data of Harbin-to-Dalian high-speed rail in Siping section based on the wavelet analysis theory.The author puts forward a new method which uses fuzzy control filter to preprocess noi...