Method for optimizing parameter match between suspension system and damping element of hub-driven electric vehicle

Abstract

A method for optimizing parameter match between a suspension system and a damping element of hub-driven electric vehicle includes such steps as establishing vehicle dynamic analysis model accord to specific structure of hub-driven electric vehicle, optimizing parameters matching between suspension system and damping element of hub-driven electric vehicle, optimizing parameters matching between suspension system and damping element of hub-driven electric vehicle. The mathematical model of road roughness and electromagnetic force of hub motor is established. Considering the different road conditions of vehicles, At vehicle speed and load condition, the minimum relative displacement of stator and rotor, pitch angle acceleration of vehicle body and vertical vibration acceleration are taken asthe optimization objective, and the suspension dynamic deflection, tire dynamic load, suspension damping parameter, performance parameter of damping element and deformation of damping element are taken as the constraint conditions, and the parameters of suspension system and damping element are optimally matched; Verify the effectiveness of the optimization results, if not met, then re-match, if meet the requirements, then obtain the final design. The proposed optimization design method is used to optimize the parameters of suspension system and damping elements, which can effectively improvethe multi-objective performance of the vehicle under various operating conditions.

Description

technical field [0001] The invention belongs to the field of optimal design of electric vehicles, and in particular relates to a method for optimal design of a suspension system and a damping element of a wheel hub-driven electric vehicle. technical background [0002] Distributed in-wheel motor-driven electric vehicles integrate motors, deceleration mechanisms, brakes and other components into the wheels. This new chassis structure increases the unsprung mass of the vehicle. At the same time, the excitation from the road will also cause uneven motor air gaps. This will lead to further deterioration of the vibration excitation caused by the hub motor, which will adversely affect the ride comfort and grounding safety of the vehicle. How to reduce or even eliminate this effect has become one of the key issues that must be solved in the development of in-wheel motor-driven electric vehicles. [0003] Suspension performance has a great influence on vehicle ride comfort, ride co...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose an optimal design method for the suspension system and damping components of a hub-driven electric vehicle for the increase of the unsprung mass of the hub-driven electric vehicle and the deterioration of vehicle vibration caused by road surface excitation and electromagnetic excitation

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