XU Hang,NIE Yixuan,WEN Dongjie,et al. Degradation and reliability assessment of accuracy life of RV reducers[J]. Journal of Mechanical Transmission,2026,50(1):133-141.
XU Hang,NIE Yixuan,WEN Dongjie,et al. Degradation and reliability assessment of accuracy life of RV reducers[J]. Journal of Mechanical Transmission,2026,50(1):133-141. DOI: 10.16578/j.issn.1004.2539.2026.01.017.
Degradation and reliability assessment of accuracy life of RV reducers
The industrial robot industry has put forward higher requirements for RV reducers
and the precision life reflects the ability of the reducer to maintain transmission accuracy
which is one of the most important design criteria and usage indicators. To improve the precision performance of precision reducers
it is crucial to evaluate their reliability. Therefore
the degradation characteristics of precision reducers were analyzed.
Methods
2
Taking the RV80E reducer as an example
a random degradation model based on Gamma process was proposed. Combined with the performance degradation data of the reducer transmission accuracy
the model parameters were estimated based on the matrix method and the maximum likelihood estimation method. A Gaussian process regression model optimized by genetic algorithm was established using vibration characteristic data to optimize the prediction of transmission accuracy.
Results
2
The results show that the prediction accuracy based on Gaussian process regression model is significantly better than that of the traditional regression model. The posterior distribution parameters of the random degradation model are updated by using the algorithm to predict the results
which can effectively evaluate the reliability of the accuracy life of RV reducer and lay the foundation for further reliability optimization design of accuracy life.
CHENG Man , QIU Cheng , LI Jinfeng , et al . Development and research of fatigue life testing device for robot reducer [J]. Journal of Mechanical Transmission , 2019 , 43 ( 5 ): 156 - 160 .
GUO S J , TANG S F , ZHANG D S . A recognition methodology for the key geometric errors of a multi-axis machine tool based on accuracy retentivity analysis [J]. Complexity , 2019 , 2019 ( 1 ): 8649496 .
WANG Yongqing , WU Jiakun , LIU Kuo , et al . Quantitative evaluation and error sensitivity analysis of accuracy retentivity of CNC machine tools [J]. Journal of Mechanical Engineering , 2019 , 55 ( 5 ): 130 - 136 .
GONG Yu , ZHOU Xiaoju , XU Leichen , et al . Research of the transmission accuracy test method of precise reducer used in robot [J]. Journal of Mechanical Transmission , 2016 , 40 ( 8 ): 134 - 137 .
YUAN Rong . Research on reliability modeling and analysis methods based on the performance degradation [D]. Chengdu : University of Electronic Science and Technology of China , 2015 : 23 - 27 .
TAO T , ZIO E , ZHAO W . A novel support vector regression method for online reliability prediction under multi-state varying operating conditions [J]. Reliability Engineering & System Safety , 2018 , 177 : 35 - 49 .
LI Jinfeng , YANG Yikun , WANG Xifeng , et al . Reliability evaluation of RV reducers based on multi degenerate data [J]. Journal of Mechanical Transmission , 2023 , 47 ( 5 ): 82 - 87 .
WANG Weiguo , SUN Lei . Residual useful life prediction research based on Gamma process and EM-PF parameter estimation algorithm [J]. Journal of Ordnance Engineering College , 2015 , 27 ( 2 ): 1 - 7 .
DONG Haosheng , YANG Heran , SUN Xingwei , et al . Surface roughness prediction of screw belt grinding based on improved neural network algorithm [J]. Surface Technology , 2022 , 51 ( 4 ): 275 - 283 .
ZHANG Shengyong , RAN Yan , ZHANG Genbao , et al . Quantitative evaluation of accuracy retentivity and analysis of accuracy degradation mechanism [J]. Journal of Mechanical Engineering , 2022 , 58 ( 7 ): 193 - 213 .
YIN Yong . Research on online monitoring and rating of transmission accuracy of RV reducers for industrial robots [D]. Xuzhou : China University of Mining and Technology , 2021 : 10 - 16 .
LI Xudong . Research on fault diagnosis of rotating components based on deep learning [D]. Beijing : National Space Science Center,Chinese Academy of Sciences , 2021 : 42 - 46 .
WANG Guofeng , CAO Zenghuan , FENG Haisheng , et al . Real-time reliability evaluation and life prediction of harmonic reducer based on multistage degradation modeling [J]. Journal of Tianjin University (Science and Technology) , 2022 , 55 ( 2 ): 122 - 132 .