Propagation Mechanism Analysis on the Acoustic Emission Signal in RV Reducer and Its Experimental Research
AN Haibo1,2,3, LIANG Wei1,2,4, ZHANG Yinlong1,2,4,5
1. State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China; 2. Key Laboratory of Networked Control Systems, Chinese Academy of Sciences, Shenyang 110016, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China; 4. Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, China; 5. Shenyang Institute of Automation, Guangzhou, Chinese Academy of Sciences, Guangzhou 511548, China
Abstract：At present, there isn't a quantitative analysis on acoustic emission propagation mechanism of RV (rotate vector) reducer. For this problem, this paper seeks to analyze and investigate the propagation mechanism of acoustic emission signals in RV reducer, and monitors and evaluates the reducer failures accurately, such as the reducer wear. Firstly, the propagation model of acoustic emission signal in RV reducer is built based on its kinematic mechanism. Then the wavelet transform analysis is used to obtain the time-frequency component features of acoustic emission signals at different frequency bands, and the trend evolution model of acoustic emission signals is derived. In the accelerated degradation tests of RV reducer, the evolution trends of acoustic emission signals in 4 different wear states are obtained, which proves the validity of the acoustic emission signal propagation model.
 International Federation of Robotics. Industrial robots:Robot investment reaches record 16.5 billion USD[EB/OL] (2019-10-07)[2019-09-18]. https://ifr.org/ifr-press-releases/news/robot-investment-reaches-record-16.5-billion-usd.  Capolino G A, Antonino-Daviu J A, Riera-Guasp M. Modern diagnostics techniques for electrical machines, power electronics, and drives[J]. IEEE Transactions on Industrial Electronics, 2015, 62(3):1738-1745.  黄兴,何文杰,符远翔.工业机器人精密减速器综述[J].机床与液压,2015,43(13):1-6.Huang X, He W J, Fu Y X. Summary of precision speed reducer of industrial robots[J]. Machine Tool & Hydraulics, 2015, 43(13):1-6.  Al-Ghamd A M, Mba D. A comparative experimental study on the use of acoustic emission and vibration analysis for bearing defect identification and estimation of defect size[J]. Mechanical System and Signal Processing, 2006, 20(7):1537-1571.  Kia S H, Henao H, Capolino G A. A comparative study of acoustic, vibration and stator current signatures for gear tooth fault diagnosis[C]//20th International Conference on Electrical Machines. Piscataway, USA:IEEE, 2012:1514-1519.  Huang C H, Tsai S J, et al. A study on loaded tooth contact analysis of a cycloid planetary gear reducer considering friction and bearing roller stiffness[J]. Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2017, 11(6). DOI:10.1299/jamdsm.2017jamdsm0077.  黄津晶,吴锐,罗涛.RV减速机针摆传动齿面接触特性分析[J].武汉理工大学学报(信息与管理工程版),2015,37(6):720-725.Huang J J, Wu R, Luo T. Tooth contact analysis of cycloid drive in RV reducers[J]. Journal of Wuhan University of Technology (Information & Management Engineering), 2015, 37(6):720-725.  Kia S H, Henao H, Capolino G-A. Gear tooth surface damage fault detection using induction machine stator current space vector analysis[J]. IEEE Transactions on Industrial Electronics, 2015, 62(3):1866-1878.  张宇,卢文秀,褚福磊.基于声发射衰减特性的故障行星轮定位研究[J].振动与冲击,2017,36(3):14-19.Zhang Y, Lu W X, Chu F L. Faulted planet gear positioning based on attenuation characteristics of AE signals[J]. Journal of Vibration and Shock, 2017, 36(3):14-19.  桂勇,韩勤锴,李峥,等.变速行星齿轮系统故障诊断方法[J].振动、测试与诊断,2016,36(2):220-226,396.Gui Y, Han Q K, Li Z, et al. Fault diagnosis of planetary gear system under time-varying speed conditions[J]. Journal of Vibration, Measurement & Diagnosis, 2016, 36(2):220-226,396.  An H B, Liang W, Zhang Y L, et al. Rotate vector reducer crankshaft fault diagnosis using acoustic emission techniques[C]//5th International Conference on Enterprise Systems. Piscataway, USA:IEEE, 2017:294-298.  姚灿江.RV减速器可靠性研究与关键件疲劳可靠性分析[D].北京:北方工业大学,2017.Yao C J. Research on reliability of RV reducer and fatigue reliability analysis of key parts[D]. Beijing:North China University of Technology, 2017.  陆博.基于加速退化试验的RV减速器寿命预测方法[D].哈尔滨:哈尔滨理工大学,2017.Lu B. Research on life prediction for RV reducer based on accelerated degradation[D]. Harbin:Harbin University of Science and Technology, 2017.  陈乐瑞,曹建福,王晓琪.结合非线性频谱和核主元分析的机器人用RV减速器故障诊断[J].西安交通大学学报,2020,54(1):32-41.Chen L R, Cao J F, Wang X Q. Fault diagnosis for robot RV reducer using nonlinear frequency spectrum and kernel principal component analysis[J]. Journal of Xi'an Jiaotong University, 2020, 54(1):32-41.  徐龙飞.基于声发射的RV减速器故障识别研究[D].昆明:昆明理工大学,2015.Xu L F. Fault identification of RV reducer based on acoustic emission technique[D]. Kunming:Kunming University of Science and Technology, 2015.  李瑰贤,柳长安,吴俊飞,等.变厚齿轮RV减速器的参数化系统设计[J].哈尔滨工业大学学报,1999,28(6):87-89.Li G X, Liu C A, Wu J F, et al. Parameteried design of bevoloid gear RV reducer[J]. Journal of Harbin Institute of Technology, 1999, 28(6):87-89.  李端玲,王允地,樊养余,等.机器人用RV减速器的瞬心特性和受力分析[J].机械科学与技术,2001(6):860-861, 880.Li D L, Wang Y D, Fan Y Y, et al. On the behavior of instantaneous center and mechanical characteristics of a RV reducer used in robot[J]. Mechanical Science and Technology, 2001(6):860-861,880.  张洁.RV减速器传动特性分析[D].天津:天津大学,2012.Zhang J. Analysis on the transmission characteristic of RV reducer[D]. Tianjin:Tianjin University, 2012.  Li X L. A brief review:Acoustic emission method for tool wear monitoring during turning[J]. International Journal of Machine Tools & Manufacture, 2002, 42(2):157-165.  Faisal N H, Ahmed R, Reuben R L. Indentation testing and its acoustic emission response:Applications and emerging trends[J]. International Materials Reviews, 2011, 56(2):98-142.  Kannivel S, Vellayaraj A, Kolimi I, et al. Effect of thickness on indentation response and tensile loading behaviour of glass/epoxy laminates under acoustic emission monitoring[J]. Nondestructive Testing and Evaluation, 2020. DOI:10.1080/10589759.2019.1709456.  An H B, Liang W, Zhang Y L, et al. Retrogressive analysis of industrial robot rotate vector reducer using acoustic emission techniques[C]//IEEE 8th Annual International Conference on Cyber Technology in Automation, Control, and Intelligent Systems. Piscataway, USA:IEEE, 2018:366-372.  Li S T. Design and strength analysis methods of the trochoidal gear reducers[J]. Mechanism and Machine Theory, 2014, 81:140-154.