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基于SWT和Hilbert的密封磁阻马达式CRDM振动信号去噪

基于SWT和Hilbert的密封磁阻马达式CRDM振动信号去噪

De-noising of Vibration Signal of Sealed Magnetoresistive Motor CRDM Based on Semi-soft Wavelet Threshold and Hilbert Transformation

De-noising of Vibration Signal of Sealed Magnetoresistive Motor CRDM Based on Semi-soft Wavelet Threshold and Hilbert Transformation

doi:
10.7538/yzk.2017.youxian.0198
摘要:
针对控制棒驱动机构滚轮振动信号采集过程受到噪声干扰的问题,提出了小波半软阈值(SWT)和Hilbert变换法相结合的去噪方法.该方法首先利用小波半软阈值算法在时频域对滚轮振动信号进行降噪处理,然后进行Hilbert变换求出其包络谱,分析寿命试验与缺陷验证试验中不同的滚轮振动信号.试验结果表明,该方法可有效消除噪声对振动信号的干扰,证明了小波半软阈值与Hilbert变换相结合的方法在驱动机构滚轮状态识别和故障诊断中的有效性,为驱动机构的状态判别提供了理论支持.
Abstract:
Aiming at the problem of noise jamming in the vibration signal of roller acqui-sition process of the control rod drive mechanism(CRDM),a de-noising method combi-ning semi-soft wavelet threshold and Hilbert transformation was proposed.First,the semi-soft wavelet threshold was used to denoise the vibration signal of roller in the time-frequency domain,then the Hilbert transformation was used to find envelope spectrum, and the different vibration signals of the roller in the life test and the defect verification test were analyzed.The result shows that this method can effectively eliminate the noise jamming on the vibration signal,which proves the validity of the method in the state recognition and fault diagnosis of the CRDM,and provides theoretical support for the state recognition of the CRDM.
作者 石磊 陈玲 张黎明
Author: SHI Lei CHEN Ling ZHANG Liming
作者单位 海军工程大学 核能科学与工程系,湖北 武汉,430033
期 刊: 原子能科学技术 ISTIC EI SCI PKU CSSCI
Journal: Atomic Energy Science and Technology
年,卷(期) 2018, 52(2)
分类号 TL387
关键词: 寿命试验 知识脉络 缺陷验证试验 知识脉络 小波半软阈值 知识脉络 Hilbert变换法 知识脉络
Keywords: life test defect verification test semi-soft wavelet threshold Hilbert transformation
机标分类号
基金项目 中国核动力研究设计院核反应堆系统设计技术重点实验室基金资助项目
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