汽车悬架机械阻抗推导及特性分析  

Mechanical impedance derivation and characteristic characteristic of vehicle suspension

作　　者：陈强[1] 范伟光[2] 王帅[2] 房强[2] 庄晔[1] CHEN Qiang;FAN Wei-guang;WANG Shuai;FANG Qiang;ZHUANG Ye(State Key Laboratory of Automotive Simulation arid Control,Jilin University,Changchun 130022,China;China North Vehicle Research Institute,Beijing 100012,China)

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022 [2]中国北方车辆研究所,北京100072

出　　处：《吉林大学学报（工学版）》2022年第5期990-997,共8页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点研发计划项目(2018YFB0104804)。

摘　　要：针对四分之一车建立了适用于被动、半主动和主动悬架的一般模型,推导了悬架机械阻抗矩阵,分离出外界激励力并指出路面激励对悬架系统的输入是轮胎-路面耦合等效力,利用悬架阻抗增广矩阵的概念推导出簧载质量位移、速度和加速度阻抗与悬架动行程、轮胎动变形阻抗。通过引入无量纲参数、刚度比和质量比,将悬架的簧载质量和非簧载质量特性耦合一起,系统地分析了悬架同纲参数整体对簧载质量加速度阻抗、悬架动行程阻抗和轮胎动变形阻抗的影响,并讨论了可调阻尼与刚度比、质量比变化下悬架机械阻抗特性变化的特性。这种从悬架固有参数属性变化角度对悬架振动性能的分析,有助于对悬架理论设计、性能分析及参数优化提供理论支持,同时对抑制电动汽车的非簧载质量负效应提供了理论指导。The general quarter car model that could be used for passive suspension,semi-active suspension,and active suspension is constructed.Then the impedance matrix is derived,and the input force is also separated.It seems that the road and tire are independent,while the input force indicates the relation between the road and the tire,which coupled the road and tire’s property.The displacement impedance,velocity impedance,and the acceleration impedance of spring-mass are calculated by the transformation of the impedance augmented matrix.The suspension deflection impedance and the tire deflection impedance are also calculated by the impedance augmented matrix.The dimensionless parameters of the suspension stiffness and mass are employed to analyze the impaction of the spring-mass acceleration impedance,suspension deflection impedance,and tire deflection impedance in detail.The dimensionless parameters coupling with the spring-mass and unsprung-mass property could make up for the disadvantage of considering just one parameter.The damper also has an effect on the suspension impedance property as the dimensionless paramerters.The suspension mechanical impedance analysis is helpful to the vehicle design,performance,optimization,and the inhibition of negative effects of unsprungmass in the mechanism.

关 键 词：车辆工程 悬架机械阻抗 无量纲参数 悬阻抗不变点 非簧载质量负效应 

分 类 号：U463.33[机械工程—车辆工程]