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To overcome the difficulty in early fault diagnosis with weak fault characteristics of rolling bearings that are easily drowned out by noise in the complex operation environment, an early fault diagnosis method was proposed by integrating the improved artificial gorilla troops optimizer (IGTO) algorithm, the optimized resonance-based sparse signal decomposition (RSSD), multi-parameter and sparse maximum harmonics-to-noise-ratio deconvolution (SMHD) method. Firstly, taking the squared envelope spectrum correlated kurtosis (SE-SCK) negative value of the low resonance component as the objective function, IGTO was used to simultaneously optimize the quality factor Q, weight coefficient λ and Lagrange multiplier μ of RSSD, for the achievement of the optimal matching of wavelet basis function and dissipation function. Secondly, the obtained optimal low resonance component was inputed into SMHD for filtering processing. Finally, the fault features were extracted by the perform envelope spectrum analysis. The algorithm comparison experiments show that the proposed IGTO algorithm has significantly improved optimization performance. The results of simulation and XJTU-SY bearing full life cycle fault signal test show that the proposed method is more useful in extracting early weak fault characteristics of bearings.
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针对滚动轴承发生早期故障时其故障特征微弱,复杂运行环境下的故障特征容易被噪声淹没的问题,提出了基于改进的人工大猩猩部队(Improved Artificial Gorilla Troops Optimizer, IGTO)算法、优化共振稀疏分解(Resonance-based Sparse Signal Decomposition, RSSD)、多参数与稀疏最大谐波噪声比解卷积(Sparse Maximum Harmonics-to-noise-ratio Deconvolution, SMHD)方法相结合的早期故障诊断方法。首先,以低共振分量的平方包络谱相关峭度(Squared Envelope Spectral Correlated Kurtosis, SE-SCK)负值为目标函数,利用IGTO同时优化RSSD的品质因子Q、权重系数λ和拉格朗日乘子μ,实现小波基函数和耗散函数的最优匹配,以获得富含故障信息的最优低共振分量;其次,将其输入SMHD进行滤波处理;最后,进行包络谱分析提取故障特征。算法对比试验表明,IGTO算法寻优性能显著提高;仿真和XJTU-SY轴承全寿命周期故障信号试验结果表明,所提方法更能有效地提取滚动轴承早期微弱故障特征。
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孙梦,女,1999年生,山东菏泽人,硕士研究生;主要研究方向为机械故障诊断与信号处理;E-mail:2947017914@qq.com。
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孙梦,女,1999年生,山东菏泽人,硕士研究生;主要研究方向为机械故障诊断与信号处理;E-mail:2947017914@qq.com。
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Dual channel decomposition and synthesied filter banks, figureFileSmall=ozSbrnQGnH0HmuoHDm3yPA==, figureFileBig=J1RmZi3Xb/98kZI49Ss/CQ==, tableContent=null), ArticleFig(id=1241049286838907430, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图1, caption=
双通道分解和合成滤波器组, figureFileSmall=ozSbrnQGnH0HmuoHDm3yPA==, figureFileBig=J1RmZi3Xb/98kZI49Ss/CQ==, tableContent=null), ArticleFig(id=1241049287111537207, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.2, caption=
Convergence curves of comparative tests, figureFileSmall=yxFAFxu4671ykk8Ks0OY7g==, figureFileBig=/V8V4QpncEdq9nUMqCPD8w==, tableContent=null), ArticleFig(id=1241049287262532158, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图2, caption=
对比试验收敛曲线, figureFileSmall=yxFAFxu4671ykk8Ks0OY7g==, figureFileBig=/V8V4QpncEdq9nUMqCPD8w==, tableContent=null), ArticleFig(id=1241049287417721416, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.3, caption=
Flow chart of IGTO-RSSD-SMHD bearing fault diagnosis, figureFileSmall=2aC/BrutC0BlQipjBhSdvQ==, figureFileBig=8mh3GhQJGnkNXddzG22VIA==, tableContent=null), ArticleFig(id=1241049287644213836, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图3, caption=
IGTO-RSSD-SMHD轴承故障诊断流程图, figureFileSmall=2aC/BrutC0BlQipjBhSdvQ==, figureFileBig=8mh3GhQJGnkNXddzG22VIA==, tableContent=null), ArticleFig(id=1241049287761654354, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.4, caption=
Time-domain waveform of the simulation signal, figureFileSmall=Bt/zOcOcS7cGs7nqV5cxtw==, figureFileBig=t++XSpKUmI5L2bYcpznBjg==, tableContent=null), ArticleFig(id=1241049287929426520, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图4, caption=
仿真信号时域波形, figureFileSmall=Bt/zOcOcS7cGs7nqV5cxtw==, figureFileBig=t++XSpKUmI5L2bYcpznBjg==, tableContent=null), ArticleFig(id=1241049288051061339, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.5, caption=
Multi⁃parameter optimization curves, figureFileSmall=qes039l5HypNRbD8XBPJPg==, figureFileBig=l0eDQCOkxrZJBwQKXOtycA==, tableContent=null), ArticleFig(id=1241049288206250592, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图5, caption=
多参数寻优曲线, figureFileSmall=qes039l5HypNRbD8XBPJPg==, figureFileBig=l0eDQCOkxrZJBwQKXOtycA==, tableContent=null), ArticleFig(id=1241049289993024107, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.6, caption=
Decomposition results of the simulation signal through IGTO-RSSD, figureFileSmall=PsIAxQKjvMhT5l2qu8kHUA==, figureFileBig=beFLXqAMUQi7B0Susc3anA==, tableContent=null), ArticleFig(id=1241049290676695662, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图6, caption=
仿真信号经IGTO-RSSD的分解结果, figureFileSmall=PsIAxQKjvMhT5l2qu8kHUA==, figureFileBig=beFLXqAMUQi7B0Susc3anA==, tableContent=null), ArticleFig(id=1241049290836079220, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.7, caption=
Time-domain waveform after SMHD processing, figureFileSmall=iHyiPz/ZDl7wBvFBtqt4fg==, figureFileBig=Um423b7LDpYjwCtNmrG9eg==, tableContent=null), ArticleFig(id=1241049290907382393, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图7, caption=
经SMHD处理后的时域波形, figureFileSmall=iHyiPz/ZDl7wBvFBtqt4fg==, figureFileBig=Um423b7LDpYjwCtNmrG9eg==, tableContent=null), ArticleFig(id=1241049290974491262, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.8, caption=
Envelope spectrum after SMHD processing, figureFileSmall=nroCiPLaQvVkd3RGWe1W6w==, figureFileBig=BQ/TdgeYrNluveOZPXtr8A==, tableContent=null), ArticleFig(id=1241049291049988739, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图8, caption=
SMHD处理后的包络谱, figureFileSmall=nroCiPLaQvVkd3RGWe1W6w==, figureFileBig=BQ/TdgeYrNluveOZPXtr8A==, tableContent=null), ArticleFig(id=1241049291163234956, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.9, caption=
Envelope spectrum of IGTO-RSSD low resonance component, figureFileSmall=XCztS+zoTMnpn7Wp0Mq+1w==, figureFileBig=jvD/iJJiSyw+h441DnEw0Q==, tableContent=null), ArticleFig(id=1241049291427476112, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图9, caption=
IGTO-RSSD低共振分量包络谱, figureFileSmall=XCztS+zoTMnpn7Wp0Mq+1w==, figureFileBig=jvD/iJJiSyw+h441DnEw0Q==, tableContent=null), ArticleFig(id=1241049291599442583, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.10, caption=
Envelope spectrum after IGTO-RSSD and SMHD processing, figureFileSmall=ZCMCDAfs9myUOXSgyB5raQ==, figureFileBig=ayyEy6dg+jDVtmgPDvIAyg==, tableContent=null), ArticleFig(id=1241049291876266654, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图10, caption=
经IGTO-RSSD和SMHD处理后的包络谱, figureFileSmall=ZCMCDAfs9myUOXSgyB5raQ==, figureFileBig=ayyEy6dg+jDVtmgPDvIAyg==, tableContent=null), ArticleFig(id=1241049291989512869, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.11, caption=
Envelope spectrum of GTO-RSSD and SMHD method, figureFileSmall=qNq/4lJtNNbSxnzxV2Cbpg==, figureFileBig=oD7YB+A/DOiIXwwFz4GyOA==, tableContent=null), ArticleFig(id=1241049292119536296, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图11, caption=
GTO-RSSD和SMHD方法的包络谱, figureFileSmall=qNq/4lJtNNbSxnzxV2Cbpg==, figureFileBig=oD7YB+A/DOiIXwwFz4GyOA==, tableContent=null), ArticleFig(id=1241049292283114157, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.12, caption=
Envelope spectrum of low resonance components in traditional RSSD, figureFileSmall=C+sIl6oovBoYLortTVwzLg==, figureFileBig=uQcDFXOg9g79kX8zqMSbMw==, tableContent=null), ArticleFig(id=1241049292526383793, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图12, caption=
传统RSSD低共振分量的包络谱, figureFileSmall=C+sIl6oovBoYLortTVwzLg==, figureFileBig=uQcDFXOg9g79kX8zqMSbMw==, tableContent=null), ArticleFig(id=1241049294153773750, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.13, caption=
Envelope spectrum of traditional RSSD and SMHD method, figureFileSmall=jJs/vyAulPKbUuZMngDrhw==, figureFileBig=cfIHYLGYMu+58BTdaPtXiw==, tableContent=null), ArticleFig(id=1241049294531261117, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图13, caption=
传统RSSD和SMHD方法的包络谱, figureFileSmall=jJs/vyAulPKbUuZMngDrhw==, figureFileBig=cfIHYLGYMu+58BTdaPtXiw==, tableContent=null), ArticleFig(id=1241049294619341507, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.14, caption=
Envelope spectrum of IGTO-RSSD and MCKD method, figureFileSmall=2qAlj+jt/oKd/qi32oiGWQ==, figureFileBig=35EH71uDlD19Z0YCtMbv/w==, tableContent=null), ArticleFig(id=1241049294707421892, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图14, caption=
IGTO-RSSD和MCKD方法的包络谱, figureFileSmall=2qAlj+jt/oKd/qi32oiGWQ==, figureFileBig=35EH71uDlD19Z0YCtMbv/w==, tableContent=null), ArticleFig(id=1241049294891971276, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.15, caption=
Bearing acceleration life test bench, figureFileSmall=6d46pn9AkuxQNgPQ6WSvzw==, figureFileBig=Pp2KBXwDCS29M5EfFZKrdQ==, tableContent=null), ArticleFig(id=1241049295147823823, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图15, caption=
轴承加速度寿命试验台, figureFileSmall=6d46pn9AkuxQNgPQ6WSvzw==, figureFileBig=Pp2KBXwDCS29M5EfFZKrdQ==, tableContent=null), ArticleFig(id=1241049295256875736, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.16, caption=
Decomposition results of outer ring fault signals through RSSD optimized by IGTO, figureFileSmall=5TDA+73fRTLzXDWIVpbONw==, figureFileBig=XPlU/iroh8pD0hfrs32mcA==, tableContent=null), ArticleFig(id=1241049295374316251, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图16, caption=
外圈故障信号经IGTO优化RSSD的分解结果, figureFileSmall=5TDA+73fRTLzXDWIVpbONw==, figureFileBig=XPlU/iroh8pD0hfrs32mcA==, tableContent=null), ArticleFig(id=1241049295558865634, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.17, caption=
Optimization curves of the multi parameter method(test), figureFileSmall=pWLkHmSO2rlKeRP67dN6Qg==, figureFileBig=N+w2D4Le39xeInDIXRtxGw==, tableContent=null), ArticleFig(id=1241049295680500455, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图17, caption=
多参数寻优曲线(试验), figureFileSmall=pWLkHmSO2rlKeRP67dN6Qg==, figureFileBig=N+w2D4Le39xeInDIXRtxGw==, tableContent=null), ArticleFig(id=1241049295823106797, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.18, caption=
Time-domain waveform after SMHD processing(test), figureFileSmall=0rj2bCFd3D5OpQPHGGz93g==, figureFileBig=g6Xa9veRuM7Vp4MJHGV/+A==, tableContent=null), ArticleFig(id=1241049295915381487, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图18, caption=
经SMHD处理后的时域波形(试验), figureFileSmall=0rj2bCFd3D5OpQPHGGz93g==, figureFileBig=g6Xa9veRuM7Vp4MJHGV/+A==, tableContent=null), ArticleFig(id=1241049296024433399, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.19, caption=
Envelope spectrum after SMHD processing(test), figureFileSmall=JtL0C3Ko0p5RjC8rv33Jsg==, figureFileBig=SrC6P6IVOjmAYAbEwpm67g==, tableContent=null), ArticleFig(id=1241049296271897340, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图19, caption=
SMHD处理后的包络谱(试验), figureFileSmall=JtL0C3Ko0p5RjC8rv33Jsg==, figureFileBig=SrC6P6IVOjmAYAbEwpm67g==, tableContent=null), ArticleFig(id=1241049296418697984, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.20, caption=
Envelope spectrum of the low resonance component in IGTO-RSSDE method(test), figureFileSmall=Gi5xv/tTJAjkYMz4jSXM0A==, figureFileBig=7EfQW7T9eZxDUvT4n/UXDw==, tableContent=null), ArticleFig(id=1241049296569692933, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图20, caption=
IGTO-RSSD低共振分量包络谱(试验), figureFileSmall=Gi5xv/tTJAjkYMz4jSXM0A==, figureFileBig=7EfQW7T9eZxDUvT4n/UXDw==, tableContent=null), ArticleFig(id=1241049296896848651, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.21, caption=
Envelope spectrum after IGTO-RSSD and SMHD processing(test), figureFileSmall=qiUEFX+uJ0kHGkdwBaDECw==, figureFileBig=OG7JzIsvEjX/W1f0Yg8vpw==, tableContent=null), ArticleFig(id=1241049297165284112, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图21, caption=
经IGTO-RSSD和SMHD处理后的包络谱(试验), figureFileSmall=qiUEFX+uJ0kHGkdwBaDECw==, figureFileBig=OG7JzIsvEjX/W1f0Yg8vpw==, tableContent=null), ArticleFig(id=1241049299220493077, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.22, caption=
Envelope spectrum of GTO-RSSD and SMHD method(test), figureFileSmall=Y6baJG4LTkX4DQOJOWX/gA==, figureFileBig=POYRuyZHYnLd8QLluNHV6g==, tableContent=null), ArticleFig(id=1241049299312767771, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图22, caption=
GTO-RSSD和SMHD方法的包络谱(试验), figureFileSmall=Y6baJG4LTkX4DQOJOWX/gA==, figureFileBig=POYRuyZHYnLd8QLluNHV6g==, tableContent=null), ArticleFig(id=1241049299396653853, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.23, caption=
Envelope spectrum of low resonance components in traditional RSSD method(test), figureFileSmall=5zZN7/cFuf7xcxv+9v9RqA==, figureFileBig=td92+PcI11Ilk1INklR/fA==, tableContent=null), ArticleFig(id=1241049299593786145, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图23, caption=
传统RSSD低共振分量的包络谱(试验), figureFileSmall=5zZN7/cFuf7xcxv+9v9RqA==, figureFileBig=td92+PcI11Ilk1INklR/fA==, tableContent=null), ArticleFig(id=1241049299816084263, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.24, caption=
Envelope spectrum of traditional RSSD and SMHD method(test), figureFileSmall=dM+ma73OWJYryOzrQ6StEA==, figureFileBig=i6y3ALfXBTJzmABtz906+g==, tableContent=null), ArticleFig(id=1241049300097102638, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图24, caption=
传统RSSD和SMHD方法的包络谱(试验), figureFileSmall=dM+ma73OWJYryOzrQ6StEA==, figureFileBig=i6y3ALfXBTJzmABtz906+g==, tableContent=null), ArticleFig(id=1241049300235514676, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Fig.25, caption=
Envelope spectrum of IGTO-RSSD and MCKD method(test), figureFileSmall=A49h0UR14tXI46/cZENJfw==, figureFileBig=psTHXbS92Dql9b6ndpPNCQ==, tableContent=null), ArticleFig(id=1241049300457812798, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=图25, caption=
IGTO-RSSD和MCKD方法的包络谱(试验), figureFileSmall=A49h0UR14tXI46/cZENJfw==, figureFileBig=psTHXbS92Dql9b6ndpPNCQ==, tableContent=null), ArticleFig(id=1241049300726248257, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Tab.1, caption=
SNR and RMSE of simulated signals
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法Method | SNR/dB | RMSE/(m/s2) |
|---|
| IGTO-RSSD | 16.38 | 0.22 |
| GTO-RSSD | 4.71 | 0.82 |
传统RSSD Traditional RSSD | 3.10 | 1.00 |
), ArticleFig(id=1241049300818522947, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=表1, caption=
仿真信号的SNR和RMSE
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法Method | SNR/dB | RMSE/(m/s2) |
|---|
| IGTO-RSSD | 16.38 | 0.22 |
| GTO-RSSD | 4.71 | 0.82 |
传统RSSD Traditional RSSD | 3.10 | 1.00 |
), ArticleFig(id=1241049300931769161, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Tab.2, caption=
LDK UER204 bearing parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
参数 Parameter | 滚珠直径 Ball diameter D/mm | 滚珠个数 Number of ball bearings n | 接触角 Contact angle θ/(°) | 基本额定静载荷 Basic static load rating / kN |
|---|
值 Value | 7.92 | 8 | 0 | 6.65 |
), ArticleFig(id=1241049301414114125, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=表2, caption=
LDK UER204轴承参数
, figureFileSmall=null, figureFileBig=null, tableContent=
参数 Parameter | 滚珠直径 Ball diameter D/mm | 滚珠个数 Number of ball bearings n | 接触角 Contact angle θ/(°) | 基本额定静载荷 Basic static load rating / kN |
|---|
值 Value | 7.92 | 8 | 0 | 6.65 |
), ArticleFig(id=1241049301586080593, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Tab.3, caption=
Fault characteristic frequencies of bearings(1-1)
, figureFileSmall=null, figureFileBig=null, tableContent=
载荷 Load/kN | 转速 Speed/(r/min) | 内圈 Inner ring/Hz | 外圈 Outer ring/Hz |
|---|
| 12 | 2 100 | 172.90 | 107.91 |
), ArticleFig(id=1241049303079252822, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=表3, caption=
轴承(1-1)的故障特征频率
, figureFileSmall=null, figureFileBig=null, tableContent=
载荷 Load/kN | 转速 Speed/(r/min) | 内圈 Inner ring/Hz | 外圈 Outer ring/Hz |
|---|
| 12 | 2 100 | 172.90 | 107.91 |
), ArticleFig(id=1241049303267996506, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=EN, label=Tab.4, caption=
SNR and RMSE of outer ring fault signals
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法Method | SNR/dB | RMSE/(m/s2) |
|---|
| IGTO-RSSD | 20.17 | 0.19 |
| GTO-RSSD | 12.43 | 0.47 |
| 传统RSSD Traditional RSSD | 3.67 | 1.26 |
), ArticleFig(id=1241049303460934491, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049258867093585, language=CN, label=表4, caption=
外圈故障信号的SNR和RMSE
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法Method | SNR/dB | RMSE/(m/s2) |
|---|
| IGTO-RSSD | 20.17 | 0.19 |
| GTO-RSSD | 12.43 | 0.47 |
| 传统RSSD Traditional RSSD | 3.67 | 1.26 |
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