Method for Determining the Range of Design Variables in Multi-objective Optimization of RV Reducer Main Bearing

Abstract

The invention discloses a method for determining a design variable range in multi-objective optimization of a main bearing of an RV reducer. The method comprises the steps of firstly determining original design parameters, working conditions, constraint conditions and initial design variables of the main bearing; secondly establishing a quasi-statics model, outputting objective functions of angle stiffness, friction torque and fatigue life, performing optimization by applying MOTLBO, and combining ball diameters and ball numbers of an optimization result to obtain all ball diameter and ball number combinations; and finally performing maximum and minimum normalization processing, calculating a Euclidean distance between a processed solution set and an original design, selecting first 20% of individuals with the minimum Euclidean distance, analyzing a proportion of each combination in the first 20% of the individuals, selecting the combination with the highest proportion, performing multi-objective optimization by applying MOTLBO, until a change range of design variables in an optimization result meets a stop condition, and outputting finally determined design variables and change range. According to the method, the design variables of the specific ball diameter and ball number combination of the main bearing of the RV reducer and the reasonable change range of the design variables are obtained, so that the optimization design efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of optimization design of main bearings of RV reducers, and in particular relates to a method for determining the range of design variables in multi-objective optimization of main bearings of RV reducers. Background technique [0002] As a precision control component on the arm of an industrial robot, the RV reducer's characteristics directly affect the mechanical characteristics of the industrial robot, and the main bearing of the RV reducer is the main bearing element of the RV reducer, which affects its smooth operation, positioning and rotation accuracy, Work reliability has an important impact, and the theoretical research in this area in my country is still blank at present, lacks design guidance, and the finished products are mostly imitations, so relevant optimization design guidance is urgently needed; at the same time, for RV reducer main bearings that lack design experience It is said that how to ch...

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Problems solved by technology

[0004] In addition, in the published patents and published related literature, there is no method for determining the multi-objective optimization design variables of the RV reducer main bearing based on the pseudo-static model, and there is no related method analysis

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