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The challenge in predicting the remaining useful life (RUL) of multi-mode stochastic degradation equipment lies in establishing a class of stochastic degradation models capable of characterizing multiple distinct degradation modes and deriving the remaining useful life distribution of the equipment under such multi-mode stochastic degradation models.First, a generalized stochastic degradation model based on the nonlinear Wiener process was developed, achieving a unified characterization of multi-mode stochastic degradation processes. Second, a maximum likelihood estimation (MLE) method for model parameters was proposed, utilizing historical degradation data from similar equipment. Third, an analytical approximate solution for the probability density function (PDF) of the remaining useful life distribution of multi-mode stochastic degradation equipment was derived under the first hitting time (FHT) framework. Finally, a sequential Bayesian framework for model parameter updating was constructed, enabling online prediction of the remaining useful life of in-service equipment.Numerical simulation analyses and an application case study on bearing remaining useful life prediction demonstrate that the proposed method can effectively model the multi-mode stochastic degradation processes of stochastic degradation equipment and accurately predict the remaining useful life, thereby providing predictive information to support subsequent maintenance decision-making for the system.
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多模式随机退化设备剩余使用寿命(Remaining Useful Life,RUL)预测的难点在于建立一类能够刻画多种不同退化模式的随机退化模型,并求解多模式随机退化模型下设备的RUL分布。首先,建立了一类基于非线性Wiener过程的一般化随机退化模型,实现了多模式随机退化过程统一刻画。其次,提出了基于同类设备历史退化数据的模型参数极大似然估计(Maximum Likelihood Estimation,MLE)方法。再次,推导了首达时间意义下多模式随机退化设备RUL分布的概率密度函数(Probability Density Function,PDF)的解析近似解。最后,构建了模型参数更新的序贯贝叶斯架构,实现了在役设备RUL的在线预测。数值仿真分析及轴承RUL预测的应用实例表明,所提方法能够有效建模随机退化设备的多模式随机退化过程,并准确预测设备的RUL,为系统后续的维修决策提供预测信息依据。
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李梦草,女,1999年生,河南开封人,在读硕士研究生;主要研究方向为随机退化系统剩余寿命预测与健康管理;E-mail:dreamgrassli@foxmail.com。
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李梦草,女,1999年生,河南开封人,在读硕士研究生;主要研究方向为随机退化系统剩余寿命预测与健康管理;E-mail:dreamgrassli@foxmail.com。
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63(1):208-222., articleTitle=An additive Wiener process-based prognostic model for hybrid deteriorating systems, refAbstract=null)], funds=[Fund(id=1241810838579905378, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, awardId=62233017; 62373369; 62450056; 62373368, language=EN, fundingSource=National Natural Science Foundation of China(62233017; 62373369; 62450056; 62373368), fundOrder=null, country=null), Fund(id=1241810838630237027, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, awardId=62233017; 62373369; 62450056; 62373368, language=CN, fundingSource=国家自然科学基金项目(62233017; 62373369; 62450056; 62373368), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1241810827364336384, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, xref=null, ext=[AuthorCompanyExt(id=1241810827372724993, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, companyId=1241810827364336384, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Rocket Force University of Engineering, Xi'an 710025, China), AuthorCompanyExt(id=1241810827376919298, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, companyId=1241810827364336384, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=火箭军工程大学,西安 710025)])], figs=[ArticleFig(id=1241810832204563258, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.1, caption=
Degradation trajectories simulation-generated by the 1st group of parameters, figureFileSmall=TNIsveRJR1TQP38FtnBb3A==, figureFileBig=ZdA029H/CIcO16ZxeWA6Xg==, tableContent=null), ArticleFig(id=1241810833831953211, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图1, caption=
基于第1组参数仿真生成的退化轨迹, figureFileSmall=TNIsveRJR1TQP38FtnBb3A==, figureFileBig=ZdA029H/CIcO16ZxeWA6Xg==, tableContent=null), ArticleFig(id=1241810833999725372, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.2, caption=
Degradation trajectories simulation-generated by the 2nd group of parameters, figureFileSmall=/kjx1geAoBh1FzypQ2/sjA==, figureFileBig=iyZUca9JRZ1ryskumk2CMw==, tableContent=null), ArticleFig(id=1241810834066834237, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图2, caption=
基于第2组参数仿真生成的退化轨迹, figureFileSmall=/kjx1geAoBh1FzypQ2/sjA==, figureFileBig=iyZUca9JRZ1ryskumk2CMw==, tableContent=null), ArticleFig(id=1241810834180080446, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.3, caption=
Degradation trajectories simulation-generated by the 3rd group of parameters, figureFileSmall=vmZC5+FkReJgVB7seMRDGw==, figureFileBig=3LyjWwA+NePrAMDnXF2CBg==, tableContent=null), ArticleFig(id=1241810834263966527, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图3, caption=
基于第3组参数仿真生成的退化轨迹, figureFileSmall=vmZC5+FkReJgVB7seMRDGw==, figureFileBig=3LyjWwA+NePrAMDnXF2CBg==, tableContent=null), ArticleFig(id=1241810834335269696, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.4, caption=
Simulated and computed results under the 1st group of parameters, figureFileSmall=hNXxAcjjZymeJIwpz5lGHg==, figureFileBig=rUojronPg0bJf8odU8t/tQ==, tableContent=null), ArticleFig(id=1241810834494653249, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图4, caption=
第1组参数下的仿真结果与计算结果, figureFileSmall=hNXxAcjjZymeJIwpz5lGHg==, figureFileBig=rUojronPg0bJf8odU8t/tQ==, tableContent=null), ArticleFig(id=1241810834628870978, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.5, caption=
Simulated and computed results under the 2nd group of parameters, figureFileSmall=3Fq5Zq6GWPMom4JUkze6hg==, figureFileBig=d3r2iZZBvPa98+ii7xTRUQ==, tableContent=null), ArticleFig(id=1241810834821808963, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图5, caption=
第2组参数下的仿真结果与计算结果, figureFileSmall=3Fq5Zq6GWPMom4JUkze6hg==, figureFileBig=d3r2iZZBvPa98+ii7xTRUQ==, tableContent=null), ArticleFig(id=1241810834888917828, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.6, caption=
Simulated and computed results under the 3rd group of parameters, figureFileSmall=4pRvbYH256EYfNORXy+vpw==, figureFileBig=Dl16mJkLAxnu+Jm9WNBcYg==, tableContent=null), ArticleFig(id=1241810834968609605, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图6, caption=
第3组参数下的仿真结果与计算结果, figureFileSmall=4pRvbYH256EYfNORXy+vpw==, figureFileBig=Dl16mJkLAxnu+Jm9WNBcYg==, tableContent=null), ArticleFig(id=1241810835077661510, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.7, caption=
Probability density function of RUL without parameter updating, figureFileSmall=gzTfv3OA5/m9lQ50nyUBbQ==, figureFileBig=x4tLXFy7271hc9h+DR7TLQ==, tableContent=null), ArticleFig(id=1241810835153158983, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图7, caption=
参数不更新时剩余使用寿命的概率密度函数, figureFileSmall=gzTfv3OA5/m9lQ50nyUBbQ==, figureFileBig=x4tLXFy7271hc9h+DR7TLQ==, tableContent=null), ArticleFig(id=1241810835241239368, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.8, caption=
Probability density function of RUL with parameter updating, figureFileSmall=BNY3uBiXkXYf5w/xBOPonA==, figureFileBig=O4nq7IPmmaIvmyhfRqYnYg==, tableContent=null), ArticleFig(id=1241810835329319753, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图8, caption=
参数更新时剩余使用寿命的概率密度函数, figureFileSmall=BNY3uBiXkXYf5w/xBOPonA==, figureFileBig=O4nq7IPmmaIvmyhfRqYnYg==, tableContent=null), ArticleFig(id=1241810835400622922, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.9, caption=
Comparison of relative errors in RUL prediction without and with parameter updating, figureFileSmall=EFer+JTxw4YWkD2Xm53u/g==, figureFileBig=W+WewHp0iJQVcmt5Uf7X8A==, tableContent=null), ArticleFig(id=1241810835480314699, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图9, caption=
参数更新前、后剩余使用寿命预测结果相对误差的对比, figureFileSmall=EFer+JTxw4YWkD2Xm53u/g==, figureFileBig=W+WewHp0iJQVcmt5Uf7X8A==, tableContent=null), ArticleFig(id=1241810835564200780, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.10, caption=
Comparison of mean-squared errors in RUL prediction without and with parameter updating, figureFileSmall=Gr9o5cmnWiDoEXdI8HocTg==, figureFileBig=CPOYbt+hZlEA4aSyEFq3pg==, tableContent=null), ArticleFig(id=1241810835652281165, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图10, caption=
参数更新前、后剩余使用寿命预测结果均方误差的对比, figureFileSmall=Gr9o5cmnWiDoEXdI8HocTg==, figureFileBig=CPOYbt+hZlEA4aSyEFq3pg==, tableContent=null), ArticleFig(id=1241810835727778638, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.11, caption=
RMS curves of bearing vibration signal under working profile 1, figureFileSmall=viTZ1IVDO0XqwMf5QRUPng==, figureFileBig=oKQ4RMVyE+smYaQJ5awyQA==, tableContent=null), ArticleFig(id=1241810835803276111, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图11, caption=
工况1下轴承振动信号的RMS曲线, figureFileSmall=viTZ1IVDO0XqwMf5QRUPng==, figureFileBig=oKQ4RMVyE+smYaQJ5awyQA==, tableContent=null), ArticleFig(id=1241810835878773584, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.12, caption=
Shape similarity analysis of bearing degradation trajectories, figureFileSmall=CmGGDGTBZHyDvqPje0Dtfg==, figureFileBig=ztq/tZJ430NydJTabp8R/Q==, tableContent=null), ArticleFig(id=1241810835950076753, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图12, caption=
轴承退化轨迹的形状相似度分析, figureFileSmall=CmGGDGTBZHyDvqPje0Dtfg==, figureFileBig=ztq/tZJ430NydJTabp8R/Q==, tableContent=null), ArticleFig(id=1241810836025574226, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.13, caption=
Q-Q graphs of the increment of the bearing degradation, figureFileSmall=b570WK2X9+EpKvzyNGXnDw==, figureFileBig=uuv24i/vu2lFtUz1gibxRA==, tableContent=null), ArticleFig(id=1241810836084294483, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图13, caption=
轴承退化量增量的Q-Q图, figureFileSmall=b570WK2X9+EpKvzyNGXnDw==, figureFileBig=uuv24i/vu2lFtUz1gibxRA==, tableContent=null), ArticleFig(id=1241810836147209044, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.14, caption=
Convergence trajectories of partial parameters, figureFileSmall=Gdc0+5BG7dp3sWo2Zs+ykw==, figureFileBig=hjwDsqgVo9iHtMsnfDmHXg==, tableContent=null), ArticleFig(id=1241810836210123605, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图14, caption=
部分参数的收敛轨迹, figureFileSmall=Gdc0+5BG7dp3sWo2Zs+ykw==, figureFileBig=hjwDsqgVo9iHtMsnfDmHXg==, tableContent=null), ArticleFig(id=1241810836273038166, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.15, caption=
Predicted results of RUL of the bearing, figureFileSmall=ZUuxa8Wd9R2kgN9nCCljBQ==, figureFileBig=E4CTV8N9VWoaqoN0USQu7w==, tableContent=null), ArticleFig(id=1241810836361118551, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图15, caption=
轴承的剩余使用寿命预测结果, figureFileSmall=ZUuxa8Wd9R2kgN9nCCljBQ==, figureFileBig=E4CTV8N9VWoaqoN0USQu7w==, tableContent=null), ArticleFig(id=1241810836415644504, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.16, caption=
Predicted results of RUL based on M1 model, figureFileSmall=e9jtY9W9w4VeZGSY6HmvXg==, figureFileBig=3CtgJbnCbQi+c1io1oyBWg==, tableContent=null), ArticleFig(id=1241810836465976153, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图16, caption=
基于模型M1的剩余使用寿命预测结果, figureFileSmall=e9jtY9W9w4VeZGSY6HmvXg==, figureFileBig=3CtgJbnCbQi+c1io1oyBWg==, tableContent=null), ArticleFig(id=1241810836537279322, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Fig.17, caption=
Predicted results of RUL based on M2 model, figureFileSmall=T285BSaps3Y1kKapxn2hPw==, figureFileBig=ZMEdQCZTDp3TPWHr7EYiiQ==, tableContent=null), ArticleFig(id=1241810836600193883, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=图17, caption=
基于模型M2的剩余使用寿命预测结果, figureFileSmall=T285BSaps3Y1kKapxn2hPw==, figureFileBig=ZMEdQCZTDp3TPWHr7EYiiQ==, tableContent=null), ArticleFig(id=1241810836663108444, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Tab.1, caption=
Model parameters and their estimation results
, figureFileSmall=null, figureFileBig=null, tableContent=
| | b | c | μλ1 | f | g | μλ2 | σλ1 | σλ2 | σλ1λ2 | σB |
|---|
第1组参数 1st group of parameters | 真实值True value | 0.200 0 | 20.000 0 | 20.000 0 | 0.015 0 | 0.000 0 | 1.500 0 | 0.050 0 | 0.005 0 | 0.000 1 | 0.800 0 |
| 估计值Estimation value | 0.203 0 | 20.358 8 | 22.198 6 | 0.017 8 | 0.002 5 | 1.542 1 | 0.059 7 | 0.005 3 | 0.000 1 | 0.791 1 |
| 相对误差Relative error/% | 1.50 | 1.79 | 10.99 | 18.67 | — | 2.81 | 19.40 | 6.00 | 0.00 | 1.11 |
第2组参数 2nd group of parameters | 真实值True value | 0.250 0 | 30.000 0 | 50.000 0 | 0.015 0 | 0.000 0 | 10.000 0 | 0.100 0 | 0.100 0 | 0.000 1 | 2.000 0 |
| 估计值Estimation value | 0.250 5 | 30.051 4 | 58.621 0 | 0.017 5 | -0.071 5 | 10.290 0 | 0.118 8 | 0.101 7 | 0.000 1 | 1.986 1 |
| 相对误差Relative error/% | 0.20 | 0.17 | 17.24 | 16.67 | — | 2.90 | 18.80 | 1.70 | 0.00 | 0.70 |
第3组参数 3rd group of parameters | 真实值True value | 0.200 0 | 10.000 0 | 50.000 0 | 0.005 0 | 0.200 0 | 30.000 0 | 0.100 0 | 0.100 0 | 0.001 0 | 0.800 0 |
| 估计值Estimation value | 0.196 1 | 10.500 5 | 59.357 8 | 0.005 9 | 0.231 7 | 32.010 6 | 0.116 3 | 0.102 6 | 0.001 1 | 0.810 0 |
| 相对误差Relative error/% | 1.95 | 5.01 | 18.72 | 18.00 | 15.85 | 6.70 | 16.30 | 2.60 | 10.00 | 1.25 |
), ArticleFig(id=1241810836721828701, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=表1, caption=
模型参数及其估计结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| | b | c | μλ1 | f | g | μλ2 | σλ1 | σλ2 | σλ1λ2 | σB |
|---|
第1组参数 1st group of parameters | 真实值True value | 0.200 0 | 20.000 0 | 20.000 0 | 0.015 0 | 0.000 0 | 1.500 0 | 0.050 0 | 0.005 0 | 0.000 1 | 0.800 0 |
| 估计值Estimation value | 0.203 0 | 20.358 8 | 22.198 6 | 0.017 8 | 0.002 5 | 1.542 1 | 0.059 7 | 0.005 3 | 0.000 1 | 0.791 1 |
| 相对误差Relative error/% | 1.50 | 1.79 | 10.99 | 18.67 | — | 2.81 | 19.40 | 6.00 | 0.00 | 1.11 |
第2组参数 2nd group of parameters | 真实值True value | 0.250 0 | 30.000 0 | 50.000 0 | 0.015 0 | 0.000 0 | 10.000 0 | 0.100 0 | 0.100 0 | 0.000 1 | 2.000 0 |
| 估计值Estimation value | 0.250 5 | 30.051 4 | 58.621 0 | 0.017 5 | -0.071 5 | 10.290 0 | 0.118 8 | 0.101 7 | 0.000 1 | 1.986 1 |
| 相对误差Relative error/% | 0.20 | 0.17 | 17.24 | 16.67 | — | 2.90 | 18.80 | 1.70 | 0.00 | 0.70 |
第3组参数 3rd group of parameters | 真实值True value | 0.200 0 | 10.000 0 | 50.000 0 | 0.005 0 | 0.200 0 | 30.000 0 | 0.100 0 | 0.100 0 | 0.001 0 | 0.800 0 |
| 估计值Estimation value | 0.196 1 | 10.500 5 | 59.357 8 | 0.005 9 | 0.231 7 | 32.010 6 | 0.116 3 | 0.102 6 | 0.001 1 | 0.810 0 |
| 相对误差Relative error/% | 1.95 | 5.01 | 18.72 | 18.00 | 15.85 | 6.70 | 16.30 | 2.60 | 10.00 | 1.25 |
), ArticleFig(id=1241810838202418014, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Tab.2, caption=
Prediction results of RUL under different parameters
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| 均方误差 Mean-squared error | 相对误差 Relative error/% |
|---|
不更新 Without update | 更新后 With update | 不更新 Without update | 更新后 With update |
|---|
第1组参数 1st group of parameters | 83.888 0 | 63.351 3 | 6.165 3 | 1.916 8 |
第2组参数 2nd group of parameters | 80.934 0 | 51.773 3 | 8.593 8 | 2.965 4 |
第3组参数 3rd group of parameters | 86.347 9 | 55.095 1 | 6.942 5 | 2.146 9 |
), ArticleFig(id=1241810838286304095, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=表2, caption=
不同参数下剩余使用寿命的预测结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 均方误差 Mean-squared error | 相对误差 Relative error/% |
|---|
不更新 Without update | 更新后 With update | 不更新 Without update | 更新后 With update |
|---|
第1组参数 1st group of parameters | 83.888 0 | 63.351 3 | 6.165 3 | 1.916 8 |
第2组参数 2nd group of parameters | 80.934 0 | 51.773 3 | 8.593 8 | 2.965 4 |
第3组参数 3rd group of parameters | 86.347 9 | 55.095 1 | 6.942 5 | 2.146 9 |
), ArticleFig(id=1241810838370190176, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=EN, label=Tab.3, caption=
Parameter estimation and RUL prediction results for bearings under different models
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| 模型Models | μa | σa | σB | b | c | μλ1 | f | g | μλ2 | σλ1 |
|---|
| M0 | — | — | 0.212 4 | -0.084 0 | 4.977 8 | -0.684 6 | 0.108 4 | 0.000 0 | 0.000 0 | 0.073 4 |
| M1 | 0.958 2 | 0.019 6 | 0.237 0 | 0.014 4 | — | — | — | — | — | — |
| M2 | 0.000 2 | 0.000 1 | 0.238 0 | 2.095 5 | — | — | — | — | — | — |
| 模型Models | σλ2 | σλ1λ2 | Er(25%) | Er(50%) | Er(75%) | Er(90%) | Ems(25%) | Ems(50%) | Ems(75%) | Ems(90%) |
| M0 | 0.000 0 | 0.000 2 | 10.26% | 15.30% | 18.77% | 19.89% | 190.877 3 | 183.072 4 | 126.756 9 | 108.009 3 |
| M1 | — | — | 21.62% | 45.77% | 60.60% | 74.61% | 905.796 9 | 1 121.340 3 | 712.832 4 | 857.608 1 |
| M2 | — | — | 22.67% | 49.22% | 65.98% | 79.30% | 1 142.238 9 | 1 422.247 2 | 911.161 3 | 1 139.932 5 |
), ArticleFig(id=1241810838445687649, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241686768404197594, language=CN, label=表3, caption=
不同模型下轴承的参数估计与剩余使用寿命的预测结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型Models | μa | σa | σB | b | c | μλ1 | f | g | μλ2 | σλ1 |
|---|
| M0 | — | — | 0.212 4 | -0.084 0 | 4.977 8 | -0.684 6 | 0.108 4 | 0.000 0 | 0.000 0 | 0.073 4 |
| M1 | 0.958 2 | 0.019 6 | 0.237 0 | 0.014 4 | — | — | — | — | — | — |
| M2 | 0.000 2 | 0.000 1 | 0.238 0 | 2.095 5 | — | — | — | — | — | — |
| 模型Models | σλ2 | σλ1λ2 | Er(25%) | Er(50%) | Er(75%) | Er(90%) | Ems(25%) | Ems(50%) | Ems(75%) | Ems(90%) |
| M0 | 0.000 0 | 0.000 2 | 10.26% | 15.30% | 18.77% | 19.89% | 190.877 3 | 183.072 4 | 126.756 9 | 108.009 3 |
| M1 | — | — | 21.62% | 45.77% | 60.60% | 74.61% | 905.796 9 | 1 121.340 3 | 712.832 4 | 857.608 1 |
| M2 | — | — | 22.67% | 49.22% | 65.98% | 79.30% | 1 142.238 9 | 1 422.247 2 | 911.161 3 | 1 139.932 5 |
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