Research On Smoothness Performance And Multi-objective Optimization Design Of Window Regulator

The window regulator is one of the indispensable components of the door,which can realize the performance of self-locking,sealing and sound insulation of the glass,and also provides a good vision for the driver and passengers.Due to the high frequency of use of the regulator,the movement process of the mechanism is relatively complicated,and it is rarely maintained during use.If it fails,it will seriously affect the driving comfort and safety of the driver and passenger,and will directly lead to the user complaints increasing and other issues.Most of the domestic glass lifter suppliers lack the positive design analysis capability,and are mainly modified through trial and error improvement methods,resulting in low research and development efficiency and obvious improvement effect.In recent years,computer technology has matured,and multi-objective analysis and optimization methods have been applied in many fields.Therefore,the use of dynamic analysis and multi-objective optimization methods to analyze and optimize the motion characteristics of the glass lifter system has very important theoretical significance and engineering practical value.This thesis introduces the classification and application of electric glass elevators,and gives the selection method of single and double rail rope wheel type glass lifters.According to the theoretical knowledge of kinematics,the mechanical model of the double-rail glass lifter is established,and the design points of the key components of the glass lifter are summarized,which provides the theoretical experience basis for the early data design of the glass lifter.Then,based on the CATIA data of the 3D solid model of the glass lifter,a rigid-flexible multi-body dynamics model of the double-rail rope wheel type glass lifter is established based on the Adams/View multi-body dynamics software.Referring to the technical requirements of the glass lifter,the quantitative evaluation index of the performance of the glass lifter was proposed and the dynamics simulation analysis was carried out.Through the glass lifter test bench for test benchmarking,the maximum error of simulation and test is within 5%,and the accuracy of the dynamic simulation model is verified.In this thesis,a multi-objective optimization method for glass lifter based on dynamic simulation model was proposed for solving the problem of glass deflection and slow lifting of double-rail window regulator.Firstly,based on the established rigidflexible coupled dynamics model of the regulator,used the Latin hypercube method to test and analyze the sensitivity of the factors affecting the smoothness of the window regulator.Then the second-order response surface model of the window regulator wae established based on Isight software.The multi-objective genetic algorithm was used to analyze the evaluation index of the window regulator,and the optimal design scheme was proposed to solve the problem of the smoothness of the double-rail window regulator.Finally,established a complete multi-objective optimization process based on double-rail sheave type window regulator systemIn order to verify the applicability of the optimization method to the single-rail rope wheel type window regulator,this thesis aimed at the problem of stuck in the front window regulator,analyzed the process and causes of the problem,established the theoretical mechanical model and the Adams multi-body dynamics simulation model of the single-rail window regulator.The cause of the problem was analyzed from the perspective of theory and simulation.Applied The multi-objective optimization process,the optimization scheme of the real vehicle fault problem was put forward.and tested feasibility,which reflects the generalization of the multi-objective optimization method of the window regulator.