Effect of Multifactor Interaction on the Accuracy of RV Reducers

Abstract

The rotary vector (RV) reducer is one of the widely used mechanical components in industrial systems, specifically in robots. The stability of the transmission performance of the RV reducer is crucial for the efficient operation of industrial equipment. The manufacturing and assembly errors of various components of the RV reducer during the production process are important factors that affect the transmission performance. However, in previous research work, the coupling effect of multiple errors on the transmission accuracy of RV reducer has not been fully considered. Furthermore, a vague relationship between system transmission errors and various errors also has not been thoroughly discussed, which presents a challenge to analyze and optimize the errors of components using the simulation technology of virtual prototype. Therefore, we propose a novel approach to use the response surface method (RSM) to investigate the transmission accuracy of RV reducer. Firstly, based on the constructed virtual prototype of RV reducer, the individual effects of different original errors on the overall transmission error are analyzed. Secondly, a response surface approximation model using RSM is constructed to analyze the effect of multiple error interactions on the transmission accuracy of the RV reducer, and the potential functional relationship between multiple error factors and the overall transmission error is also explored. Finally, the authenticity of the proposed approach is verified by setting up some comparative experiments. This study provides a reference for the efficient analysis and optimization of the transmission accuracy of RV reducers.

Study on Nonlinear Dynamic Characteristics of RV Reducer Transmission System

“…Therefore, analyzing the dynamic characteristics of RV reducers under nonlinear excitation holds significant theoretical research value for the stability control and dynamic performance optimization of RV reducer transmission systems. In recent years, research on the dynamic characteristics of RV reducers has predominantly focused on dynamic transmission errors [6][7][8][9][10][11][12][13][14][15], inherent properties [16][17][18][19], frequency-response characteristics [20,21], the dynamic performance of bearings within the system [22][23][24], and fault diagnosis based on dynamics [25]. Hidaka et al [6,7] established an equivalent mass-spring model for K-H-V-type reducers, laying the foundation for the dynamic analysis of RV reducers.…”

“…Wang et al [14] used Adams to calculate and analyze the transmission error of RV reducers under different loads and three different modification methods, and compared the results with a mathematical model. Wang et al [15] investigated the coupling effect of multiple errors on the transmission accuracy of an RV reducer using the response surface method. Zhang et al [16,17], based on a torsional model, clarified the mechanisms through which the rotation of the cycloidal gear, the supporting stiffness of the planet carrier bearing, and the crankshaft bending stiffness affect the natural frequencies of the system, and analyzed the sensitivity of the natural characteristics to bearing stiffness.…”

“…In [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], most of the studies only established linear dynamic models. Some have considered the nonlinearity induced by contact and errors between components.…”