Research On Geometric Parameter Modeling And Performance Optimization Of Moving Armature Proportional Solenoid

As the most critical electro-mechanical converter in the proportional valve,the Moving Armature Proportional Solenoid(MAPS)directly affects the accuracy of the electro-hydraulic control system.This thesis is supported by the National Natural Science Foundation of China,"Research on Modeling and Predictive Control Methods for Polymorphic Quality Data Flow in the Assembly Process of Complex Products"(Project Approval Number:71671130),using MAPS as the research object,and using key geometric parameters The research provides new ideas for modeling and analysis of geometric parameters and performance optimization.The main research contents include the following 3 aspects:(1)Aiming at the complexity and diversity of the influence of the MAPS key geometric parameters on static electromagnetic force,the three-dimensional simulation model was established to calculate the Finite Element Method(FEM)to study the influence of single geometric parameter changes on static electromagnetic force.Using JMAG-Designer software to simulate different key geometric parameters:magnetic isolation ring forward angle,guide sleeve wall thickness,radial air gap length,push rod hole radius,moving armature length,and magnetic isolation ring bottom width for static electromagnetic force simulation.According to the simulation results,the range of influence of each geometric parameter on the constant force value is determined,which provides reliable data support for further optimization of the geometric parameters of the MAPS.(2)Aiming at the design problem of horizontal constant force of the MAPS in the effective working stroke,the Response Surface Method(RSM)is proposed to establish the response surface model between key geometric parameters and static electromagnetic force.The key geometric parameters are used as the response independent variables,and the static electromagnetic force is used as the response variable to establish the response surface model between them.The consistency and prediction ability of the response model are tested by analysis of variance and R~2and Q~2 values.The response surface model is used to predict the key geometric parameters under different constant force conditions,and the predicted geometric parameters are modeled and simulated by JMAG-Designer software.The response surface model has good predictive ability.(3)Aiming at the mutual constraint between the maximum target value of the MAPS and the minimum volume of the moving armature,the joint simulation of JMAG-Designer software and mode FRONTIER multi-objective optimization software for performance optimization is proposed.Under the condition of linearity constraint,the NSAG-II algorithm is used to globally optimize the key geometric parameter values,so that the calculated moving armature volume target minimum and the average horizontal constant force target are the largest.Comparing the initial design point with the design points on the Pareto front,respectively,it is verified that the multi-objective optimization design has a significant effect on the static electromagnetic force lifting and the reduction of the moving armature volume.