The accuracy of RV reducer transmission is mainly affected by the transmission accuracy. Taking the high precision RV-80E reducer as the research object, aiming at its structural characteristics, the rigid-flexible co...The accuracy of RV reducer transmission is mainly affected by the transmission accuracy. Taking the high precision RV-80E reducer as the research object, aiming at its structural characteristics, the rigid-flexible coupling model of RV reducer is established by using ADAMS multi-body dynamics simulation software, and the correctness of the model is verified. At the same time, the rigid-flexible coupling model is used to design several groups of simulation prototypes with different errors, and the influence of different error factors on the transmission accuracy of the whole machine is analyzed by simulation. Finally, through different error factors, it is concluded that the error combination of positive equidistance+negative offset or negative equidistance+positive offset can effectively reduce the influence of transmission error on the transmission accuracy of the whole machine.展开更多
The hypocycloid RV reducer is a new type of rotor vector(RV) reducer based on the principle of internal cycloidal planetary transmission. The reducer has a compact and hollow structure. First of all, the component com...The hypocycloid RV reducer is a new type of rotor vector(RV) reducer based on the principle of internal cycloidal planetary transmission. The reducer has a compact and hollow structure. First of all, the component composition, special structure and transmission principle are analyzed. Then, the three-dimension dynamic model for the hypocycloid RV reducer was simulated. Through reasonable assumptions, the dynamic environment was defined, the dynamic model was simplified, and the kinetic equations were listed. The torsional stiffness of the shaft component is calculated, and the meshing rigidity of the cycloidal gear and the needle tooth is calculated. Finally, by using MATLAB software to solve the dynamic equations, combined with the actual parameters of the hypocycloid RV reducer, through the solving equation to obtain the natural frequency of the system, which laid the foundation for the design and research of the following hypocycloid RV reducer.展开更多
针对旋转矢量(rotary vector, RV)减速器多源耦合严重,行星齿轮局部故障所引起的冲击易被其他干扰分量所淹没,故障特征提取困难的问题,结合编码器信号的优势提出了一种基于自适应最大二阶循环平稳盲解卷积(adaptive maximum second orde...针对旋转矢量(rotary vector, RV)减速器多源耦合严重,行星齿轮局部故障所引起的冲击易被其他干扰分量所淹没,故障特征提取困难的问题,结合编码器信号的优势提出了一种基于自适应最大二阶循环平稳盲解卷积(adaptive maximum second order cyclostationarity blind deconvolution, ACYCBD)的RV减速器行星齿轮局部故障检测方法。首先,拾取伺服电机内置光编码器信号,并利用向前差分计算获得瞬时角速度(instantaneous angular speed, IAS)信号;然后,依据特征评价指标(characteristic evaluation indicator, CEI)最大化原则自适应确定ACYCBD优化滤波器长度,并对IAS信号进行增强;最后,通过识别时域中与故障冲击周期相匹配的理论齿数实现RV减速器故障检测。通过试验数据分析,并将所提方法与现有的稀疏低秩分解算法和增强CYCBD算法对比,验证了所提方法的有效性。展开更多
基金supported by Intelligent Welding Technology for Key Parts of Excavator Tianjin Natural Fund(17ZXZNGX00080)Tianjin Natural Science Foundation Project(18JCQNJC75200)Tianjin Municipal Education Commission(JWK1601)
文摘The accuracy of RV reducer transmission is mainly affected by the transmission accuracy. Taking the high precision RV-80E reducer as the research object, aiming at its structural characteristics, the rigid-flexible coupling model of RV reducer is established by using ADAMS multi-body dynamics simulation software, and the correctness of the model is verified. At the same time, the rigid-flexible coupling model is used to design several groups of simulation prototypes with different errors, and the influence of different error factors on the transmission accuracy of the whole machine is analyzed by simulation. Finally, through different error factors, it is concluded that the error combination of positive equidistance+negative offset or negative equidistance+positive offset can effectively reduce the influence of transmission error on the transmission accuracy of the whole machine.
基金supported by the Shenzhen Basic Research Project(JCYJ20150925163026555)
文摘The hypocycloid RV reducer is a new type of rotor vector(RV) reducer based on the principle of internal cycloidal planetary transmission. The reducer has a compact and hollow structure. First of all, the component composition, special structure and transmission principle are analyzed. Then, the three-dimension dynamic model for the hypocycloid RV reducer was simulated. Through reasonable assumptions, the dynamic environment was defined, the dynamic model was simplified, and the kinetic equations were listed. The torsional stiffness of the shaft component is calculated, and the meshing rigidity of the cycloidal gear and the needle tooth is calculated. Finally, by using MATLAB software to solve the dynamic equations, combined with the actual parameters of the hypocycloid RV reducer, through the solving equation to obtain the natural frequency of the system, which laid the foundation for the design and research of the following hypocycloid RV reducer.