[1]朱广贺,朱智强,李娟.基于包络解调的离心式压缩机弱故障信号增强方法研究[J].机械与电子,2022,(05):21-24.
　ZHU Guanghe,ZHU Zhiqiang,LI Juan.Research on Weak Fault Signal Enhancement Method of Centrifugal Compressor Based on Envelope Demodulation[J].Machinery & Electronics,2022,(05):21-24.
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基于包络解调的离心式压缩机弱故障信号增强方法研究()

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机械与电子[ISSN:1001-2257/CN:52-1052/TH]

Title:: Research on Weak Fault Signal Enhancement Method of Centrifugal Compressor Based on Envelope Demodulation

Author(s):: ZHU Guanghe ; ZHU Zhiqiang ; LI Juan; ( College of Computer Science and Technology , Xinjiang Normal University , Urumqi 830054 , China )

Keywords:: non-stationary conditions ; centrifugal compressor ; weak fault signal ; envelope demodulation ; enhancement

摘要:: 在离心式压缩机使用要求不断提高下,为了增强故障诊断精确性,提出基于包络解调的非平稳工况下离心式压缩机弱故障信号增强方法。将小波包分析和独立分量分析结合,通过小波包分析法对含有噪声的混合信号进行降噪,根据 FastICA 算法分离降噪后的混合信号,对分离出的信号采用收缩函数实行频段内的去噪操作,完成多源故障信号分离去噪。在故障信号分离的基础上,考虑到被分离出的信号伴随着微弱噪声,进一步通过包络解调随机共振实现弱故障信号增强。对多源信号分离结果进行包络解调操作,并对包络信号实行变尺度随机共振输出处理,实现故障特征信号增强,达到故障诊断的目的。通过实验分别对此方法的信号去噪增强效果和故障诊断精确性进行验证,实验结果表明,该方法不仅弱故障信号增强效果显著,且故障诊断鲁棒性强,精度高,具有可实践性。

Abstract:: With the increasing requirements of the use of centrifugal compressors , in order to enhance the accuracy of fault diagnosis , a weak fault signal enhancement method for centrifugal compressors under non-stationary operating conditions based on envelope demodulation is proposed.Combining wavelet packet analysis and independent component analysis , the mixed signal containing noise is denoised by wavelet packet analysis , according to FastICA algorithm , the mixed signals after denoising are separated , and the contracted function is used for the separated signal de-noise operation in the frequency band which is implemented to complete multi-source fault signal separation and de-noise.On the basis of fault signal separation , considering that the separated signal is accompanied by weak noise , the weak fault signal is enhanced by envelope demodulation stochastic resonance.The results of multi-source signal separation are demodulated by envelope , and the envelope signal is output by variable scale stochastic resonance to enhance the fault characteristic signal and achieve the purpose of fault diagnosis.The experimental method is used to verify the signal denoising enhancement effect and the accuracy of fault diagnosis.The experimental results show that the proposed method not only enhances the weak fault signal significantly , but also has strong robustness , high accuracy , and practicality.

[ 1 ] 王泓 . 润滑油黏度下降引起的烃类压缩机故障分析及措施[ J ] . 润滑与密封, 2016 , 41 ( 7 ): 143-145.

[ 2 ] 周镇新,李绍斌,谭泽汉,等 . 基于 PCA-Clustering 的压缩机回液故障诊断[ J ] . 制冷学报, 2018 , 39 ( 4 ): 111-118.

[ 3 ] 马波,赵祎,齐良才 . 变分自编码器在机械故障预警中的应用[ J ] . 计算机工程与应用, 2019 , 55 ( 12 ): 245-249 , 264.

[ 4 ] 祝勇仁,蔡杰,善盈盈 . 基于蚁群聚类算法的离心式压缩机故障诊断方法[ J ] . 油气储运, 2019 , 38 ( 4 ): 424-428.

[ 5 ] 舒文婷,程军圣,黄祝庆,等 . 基于 GP SSD 的旋转机械复合故障特征提取方法[ J ] . 电子测量与仪器学报,2018 , 32 ( 5 ): 17-24.

[ 6 ] 唐贵基,庞彬 . 迭代能量算子机械故障诊断研究[ J ] . 中国测试,2016 , 42 ( 3 ): 85-89.

[ 7 ] 徐元博,蔡宗琰,胡永彪,等 . 强噪声背景下频率加权能量算子和变分模态分解在轴承故障提取中的应用[ J ] .振动工程学报,2018 , 31 ( 3 ): 513-522.

[ 8 ] 余海涛,张涛 . 直线振荡电机谐振频率跟踪控制技术研究[ J ] . 电机与控制学报, 2019 , 23 ( 6 ): 63-72.

[ 9 ] 张永正 . 空压机几种故障的维修方法[ J ] . 棉纺织技术,2016 , 44 ( 2 ): 67.

[ 10 ] 刘向阳,吴建武 . 透平压缩机组调速故障分析[ J ] . 热能动力工程,2018 , 33 ( 5 ): 141-144.

备注/Memo:: 收稿日期: 2021-10-18
作者简介:朱广贺 ( 1984- ),男,新疆伊犁人,硕士,讲师,研究方向为大数据分析、人工智能;朱智强 ( 1993- ),男,新疆伊犁人,硕士,软件设计师,研究方向为大数据分析、人工智能;李娟 ( 1981- ),女,江苏盐城人,硕士,讲师,研究方向为大数据分析。

更新日期/Last Update: 2022-05-25