液力变矩器振动信号的小波包阈值降噪研究  

Research on Wavelet Packet Threshold Denoising for Vibration Signal of Torque Converter

作　　者：段雨 刘新洲 惠建伟 卜正锋 张泽宇[1] 惠记庄[1] Duan Yu;Liu Xinzhou;Hui Jianwei

机构地区：[1]长安大学道路施工技术与装备教育部重点实验室,710064 [2]陕西航天动力高科技股份有限公司

出　　处：《工程机械》2024年第6期140-144,I0024,共6页Construction Machinery and Equipment

基　　金：国家自然科学基金面上项目(52278390);陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-150);陕西省自然科学基金项目(2022JM-172)。

摘　　要：为解决液力变矩器运行过程中数据信号受噪声干扰大,特征不明显等问题,提出了液力变矩器振动信号的小波包阈值降噪方法。首先,在小波包降噪的基础上,提出了小波包阈值的信号降噪方法;其次,开展液力变矩器性能试验,对液力变矩器在工作时的振动信号进行采集并选用软阈值进行小波包阈值降噪处理;最后,以均方根误差为指标对小波包阈值降噪后的信号数据进行对比分析。结果表明:小波包阈值降噪效果优于小波去噪和巴特沃斯。提出的小波包阈值降噪方法对机械振动信号处理提供了技术支撑。To solve the problems of large noise interference and unclear features of the data signal during operation of the torque converter,a wavelet packet threshold denoising method for the vibration signal of the torque converter is proposed.Firstly,on the basis of wavelet packet denoising,a signal denoisingmethod of wavelet packet threshold is proposed.Secondly,theperformancetestof torque converter is carried out to collect the vibration signal of the torque converter during operation,and the soft threshold is selectforwavelet packet threshold denoising processing.Finally,with theroot mean squareerror as an index,the signal data after wavelet packet threshold denoising is compared and analyzed.The results show that the effect of wavelet packet threshold denoising is better than that of wavelet denoising and Butterworth.The proposed wavelet packet threshold denoising method provides technical support for mechanical vibration signal processing.

关 键 词：液力变矩器 小波包阈值 信号降噪 

分 类 号：TH137.332[机械工程—机械制造及自动化] TH113.1