导　　师： 高翔

学科专业： 082304

授予学位： 博士

作　　者： ;

机构地区： 江苏大学

摘　　要： 汽车动力总成悬置系统是指动力总成与车架或车身之间的弹性连接系统,是整车振动控制的重要组成部分,对提高汽车的乘坐舒适性和NVH /(Noise, Vibration and Harshness/)性能具有重要影响。近年来出现的磁流变悬置具有阻尼力可调、结构简单、能耗少等诸多优点,成为动力总成悬置系统的主要发展方向。为了提高整车的综合性能,考虑动力总成悬置系统与悬架系统之间的相互影响,对动力总成悬置系统与悬架系统进行集成控制将成为发展趋势。在上述背景下本文对液压悬置动态特性、磁流变悬置动态特性、磁流变半主动悬置系统控制策略、动力总成悬置系统与悬架系统集成控制等四个方面进行了研究。 液压悬置是磁流变悬置的基础,研究液压悬置的工作机理对研究磁流变悬置具有重要意义。针对解耦盘式液压悬置的混杂特征,基于切换系统理论,在解耦盘式液压悬置线性模型的基础上建立了切换系统模型。分别针对两种典型工况进行解耦盘式液压悬置的动态特性仿真,并与试验测试结果进行比较,验证了切换系统模型的有效性。采用切换系统模型分别对低频、大振幅和高频、小振幅正弦激励下的悬置工作过程进行仿真分析,研究了双通道流动模式和单通道流动模式的切换机理,探讨了惯性通道和解耦通道的液体流量之间的关系。对自行研制的解耦盘式液压悬置进行动态特性试验,讨论了预载荷、激振振幅、激振频率对液压悬置动态特性的影响,为揭示液压悬置工作机理和液压悬置结构设计提供了理论依据。 分析了一种挤压模式磁流变悬置的基本结构及工作原理。根据磁流变液的工作模式和设计准则,结合悬置的工作要求和结构特点,应用电磁场理论对磁流变悬置的磁路进行设计。利用有限元方法对磁流变悬置的磁路磁场进行仿真分析,得到了极板� An automotive powertrain mounting system refers to the elastic connection system between the powertrain and the vehicle frame or body. It is an important part of vehicle vibration control system and it has great influence on improving automotive riding-comfort and performance of NVH /(Noise, Vibration and Harshness/). With advantages such as adjustable damping force, simple structure and less energy consumption, the MR /(magnetorheological/) mount has become the main development direction of powertrain mounting system in recent years. In order to improve the comprehensive performance of vehicle, the study of interrelationship between powertrain mounting system and suspension system, and how to take integrated control between powertrain mounting system and suspension system are considered to become the major trend. Under such background, the paper studied the dynamic characteristics of hydraulic engine mount, the dynamic characteristics of MR mount, the control strategy of MR semi-active mounting system and the integrated control of powertrain mounting system and suspension system. The hydraulic engine mount is the basis of MR mount, and the study of hydraulic engine mount working mechanism is important to the study of MR mount. Based on the consideration of the mixed features of hydraulic engine mount with decoupler, switched system model was established on the basis of linear model of hydraulic engine mount with decoupler according on the switched system theory. Dynamic characteristics simulation of hydraulic engine mount with decoupler according to the two typical conditions was carried out respectively. Compared the test results, the validity of switched system model was verified. Switched system model was used to simulate the work process of mount with sinusoidal excitation of low frequency with large amplitude or high frequency with small amplitude respectively, study the switching mechanism in double channel flow model and single channel flow model, and discusses the relationship of liquid flows in inert

关 键 词： 动力总成悬置系统 动态特性 切换系统 切换控制 集成控制

领　　域： [机械工程] [交通运输工程] [交通运输工程]