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In order to solve the problems of high subjective misjudgment rate and low efficiency in manual hand touch and auscultation methods for acoustic quality detection of micro motors,while taking into account the accuracy of detection results and the fast construction of detection models,a small sample machine learning detection method was proposed. Based on the physical model of micro motor transmission chain,multi-dimensional acoustic fault features were extracted,particle swarm optimization was used to optimize the core parameters of support vector machine,a small sample learning method,so as to improve the accuracy of model discrimination.The experimental results show that this method can effectively distinguish abnormal vibration and sound of micro motors,with an accuracy rate of over 95%.
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为了解决微型电机声学质量检测人工手摸及听诊方法存在的主观误判率高、效率低下等问题,同时兼顾检测结果准确率和检测模型构建的快速性,提出了一种小样本机器学习检测方法,其根据微型电机传动链物理模型进行多维声学故障特征提取,在此基础上,采用粒子群优化算法对支持向量机这种小样本学习方法的核心参数进行优化,从而提高模型判别的准确率。试验结果表明,该方法能够有效判别微型电机异常振动和声音,准确率达到95%以上。
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Schematic diagram of micro motor, figureFileSmall=PO7KjiL/eU7bNajt/GGdiw==, figureFileBig=9N0vtUGza0JK70Spbw1HDA==, tableContent=null), ArticleFig(id=1205172819173810425, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=图1, caption=
微型电机示意简图, figureFileSmall=PO7KjiL/eU7bNajt/GGdiw==, figureFileBig=9N0vtUGza0JK70Spbw1HDA==, tableContent=null), ArticleFig(id=1205172819287056638, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Fig.2, caption=
Speed of micro motor during forward and reverse transients, figureFileSmall=Jc4n9sjb16fXLRsgXsAjUg==, figureFileBig=lHFGD1+/ZybzxLi0JGepow==, tableContent=null), ArticleFig(id=1205172819366748417, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=图2, caption=
微型电机正、反转瞬时转速, figureFileSmall=Jc4n9sjb16fXLRsgXsAjUg==, figureFileBig=lHFGD1+/ZybzxLi0JGepow==, tableContent=null), ArticleFig(id=1205172819467411719, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Fig.3, caption=
Vibration order spectrum of micro motor, figureFileSmall=7vyxZknDSz+PjxPCND4DPQ==, figureFileBig=OXDliGoVZyfmDydN4FmeXA==, tableContent=null), ArticleFig(id=1205172819563880715, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=图3, caption=
微型电机振动阶次谱, figureFileSmall=7vyxZknDSz+PjxPCND4DPQ==, figureFileBig=OXDliGoVZyfmDydN4FmeXA==, tableContent=null), ArticleFig(id=1205172819660349711, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Fig.4, caption=
Instantaneous speed envelope spectrum of micro motors, figureFileSmall=VEGt8wIGjUnQeuj+7BypVA==, figureFileBig=ERs0G2awGFKiHM8joPBnmQ==, tableContent=null), ArticleFig(id=1205172819777790228, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=图4, caption=
微型电机瞬时转速包络谱, figureFileSmall=VEGt8wIGjUnQeuj+7BypVA==, figureFileBig=ERs0G2awGFKiHM8joPBnmQ==, tableContent=null), ArticleFig(id=1205172819853287705, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Fig.5, caption=
Acceleration envelope spectrum of micro motor vibration, figureFileSmall=NgPV+IXoJrW3w5/wtGre0w==, figureFileBig=rhfhM6nQj3SZKrAwya2t2w==, tableContent=null), ArticleFig(id=1205172819979116834, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=图5, caption=
微型电机振动加速度包络谱, figureFileSmall=NgPV+IXoJrW3w5/wtGre0w==, figureFileBig=rhfhM6nQj3SZKrAwya2t2w==, tableContent=null), ArticleFig(id=1205172820117528870, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Fig.6, caption=
Roughness time history of micro motors, figureFileSmall=j1gEE3PJB9RmrxRyLKDbjg==, figureFileBig=0+6cD75zGtEq7v3SRmyJ8A==, tableContent=null), ArticleFig(id=1205172820193026347, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=图6, caption=
微型电机粗糙度时间历程, figureFileSmall=j1gEE3PJB9RmrxRyLKDbjg==, figureFileBig=0+6cD75zGtEq7v3SRmyJ8A==, tableContent=null), ArticleFig(id=1205172820281106735, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Fig.7, caption=
Comparison of damage waveforms of micro motor gears, figureFileSmall=MifR82z3nnJKBuHSCtdoUQ==, figureFileBig=B+2QHo+y9ZGtzgzxlZGo/Q==, tableContent=null), ArticleFig(id=1205172820381770035, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=图7, caption=
微型电机齿轮损伤波形对比, figureFileSmall=MifR82z3nnJKBuHSCtdoUQ==, figureFileBig=B+2QHo+y9ZGtzgzxlZGo/Q==, tableContent=null), ArticleFig(id=1205172820536959291, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Fig.8, caption=
Abnormal vibration and noise characteristics engineering of micro motors, figureFileSmall=3NMVczaHcTDRdLGjN5HZdA==, figureFileBig=kA4alr4KdY+5LeLeHRPvVQ==, tableContent=null), ArticleFig(id=1205172820687954242, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=图8, caption=
微型电机异常振动噪声特征工程, figureFileSmall=3NMVczaHcTDRdLGjN5HZdA==, figureFileBig=kA4alr4KdY+5LeLeHRPvVQ==, tableContent=null), ArticleFig(id=1205172820847337799, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Fig.9, caption=
Training process of small sample machine learning model based on PSO-SVM, figureFileSmall=Jit70nSbmmKddHtpI6EM1w==, figureFileBig=3ks7XShlA9zlVepFwXY0Wg==, tableContent=null), ArticleFig(id=1205172820935418187, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=图9, caption=
基于PSO-SVM 的小样本机器学习模型训练流程, figureFileSmall=Jit70nSbmmKddHtpI6EM1w==, figureFileBig=3ks7XShlA9zlVepFwXY0Wg==, tableContent=null), ArticleFig(id=1205172821023498574, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Fig.10, caption=
Micro motor vibration test bench, figureFileSmall=6wWkp71V3kYfPnfFQmnauw==, figureFileBig=G8BMf1kURfmooBIT03EUJQ==, tableContent=null), ArticleFig(id=1205172822189515089, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=图10, caption=
微型电机振动测试台, figureFileSmall=6wWkp71V3kYfPnfFQmnauw==, figureFileBig=G8BMf1kURfmooBIT03EUJQ==, tableContent=null), ArticleFig(id=1205172822277595477, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Tab.1, caption=
Sample statistics of microprocessor motor acoustic data
, figureFileSmall=null, figureFileBig=null, tableContent=
| 故障类型 | 样本数量/个 | 标签 |
| 正常情况 | 600 | 0 |
| 振动偏大 | 40 | 1 |
| 电机异音 | 40 | 2 |
| 蜗杆异音 | 80 | 3 |
| 齿轮损伤 | 30 | 4 |
| 合计 | 790 | |
), ArticleFig(id=1205172822361481558, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=表1, caption=
微机电机声学数据样本统计
, figureFileSmall=null, figureFileBig=null, tableContent=
| 故障类型 | 样本数量/个 | 标签 |
| 正常情况 | 600 | 0 |
| 振动偏大 | 40 | 1 |
| 电机异音 | 40 | 2 |
| 蜗杆异音 | 80 | 3 |
| 齿轮损伤 | 30 | 4 |
| 合计 | 790 | |
), ArticleFig(id=1205172822466339162, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=EN, label=Tab.2, caption=
Comparison of SVM method accuracy
, figureFileSmall=null, figureFileBig=null, tableContent=
| 故障类型 | 检测模型 SVM(σ =0.5,C=2) | 检测模型 SVM(σ =0.5,C=4) | 检测模型 PSO-SVM(σ =0.7,C=4.8) |
| 正确数/总数 | 准确率/% | 正确数/总数 | 准确率/% | 正确数/总数 | 准确率/% |
| 正常 | 165/180 | 91.7 | 169/180 | 93.9 | 173/180 | 96.1 |
| 振动偏大 | 10/12 | 83.3 | 10/12 | 83.3 | 11/12 | 91.7 |
| 电机异音 | 9/12 | 75.0 | 10/12 | 83.3 | 11/12 | 91.7 |
| 蜗杆异音 | 19/24 | 79.2 | 21/24 | 87.5 | 22/24 | 91.7 |
| 齿轮损伤 | 8/9 | 88.9 | 8/9 | 88.9 | 9/9 | 100 |
| 总计 | 211/237 | 89.0 | 218/237 | 92.0 | 226/237 | 95.4 |
), ArticleFig(id=1205172822567002460, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1205158522716664025, language=CN, label=表2, caption=
SVM方法准确率对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 故障类型 | 检测模型 SVM(σ =0.5,C=2) | 检测模型 SVM(σ =0.5,C=4) | 检测模型 PSO-SVM(σ =0.7,C=4.8) |
| 正确数/总数 | 准确率/% | 正确数/总数 | 准确率/% | 正确数/总数 | 准确率/% |
| 正常 | 165/180 | 91.7 | 169/180 | 93.9 | 173/180 | 96.1 |
| 振动偏大 | 10/12 | 83.3 | 10/12 | 83.3 | 11/12 | 91.7 |
| 电机异音 | 9/12 | 75.0 | 10/12 | 83.3 | 11/12 | 91.7 |
| 蜗杆异音 | 19/24 | 79.2 | 21/24 | 87.5 | 22/24 | 91.7 |
| 齿轮损伤 | 8/9 | 88.9 | 8/9 | 88.9 | 9/9 | 100 |
| 总计 | 211/237 | 89.0 | 218/237 | 92.0 | 226/237 | 95.4 |
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