摘要汽车中的悬架系统直接影响到汽车的平顺性以及行驶中的稳定 性，而汽车的平顺性和操作稳定性是汽车在市场竞争中两项重要性能 指标。现代控制理论和电子技术的进一步完善，空气悬架技术也越来 越成熟。空气悬架能根据汽车的行驶状态通过自适能力来改变刚度和 阻尼参数，相对于普通悬架系统拥有姣好的操纵稳定性和减振性，必 将成为今后汽车悬架研究的一个重要方向。空气弹簧悬架和普通钢板 弹簧悬架相比较,空气悬架车辆不仅提高了汽车行驶中的平顺度,而 且增强了汽车的稳定性，使汽车的震动对路面的损坏降到最低,从而 起到保护车上货物的作用。本论文主要是对电控空气悬架（ECAS） 的气路系统以、空气弹簧以及减震器进行分析与研究，并对电控空气 悬架（ECAS）进行数学建模，通过 MATLAB/Simulink 仿真。83691

本文主要介绍了电控空气悬架中一些重要部分进行研究。

（1）空气弹簧：主要研究了空气弹簧组成、分类以及其特有的一 些特性。

（2）减震器：主要研究了减震器的机构组成及其特有的一些属性。

（3）气路系统：主要研究了一些 ECAS 系统中最常见的气路系统， 并对其工作原理进行了介绍。

通过车辆动力学理论，建立了简化的 1/4 车二自由度汽车主动 悬架模型，对主动悬架三种不同的控制方法进行讨论研究，建立了主 动悬架动力学模型，同时搭建出积分白噪声形式的路面输入数学和仿 真模型，并设计了模糊控制器，并在 Siumlink中搭建仿真模型，进行仿真，得到结果。 

毕业论文关键词：车辆；电控空气悬架（ECAS）；空气弹簧；减震器；气路 系统；模糊控制；PID 控制

Abstract With the socialeconomyrapiddevelopment,furtherimprove people's material life level and, people want to buy the car performance has been further improved, so make the car more stable, more security becomes a priority。 And the vehicle suspension system directly affects the vehicle ride comfort and driving in the stability and ride comfort and operation stability of the car is in the market competition of two important performance indexes。 The modern control theory and electronic technology to further improve the air suspension technology is more and more mature。 The air suspension according to the driving condition of the vehicle through the adaptive ability to change the stiffness and damping parameters, compared with the ordinary suspension system with good maneuverability and vibration, will Become the future an important direction in the research of automotive suspension。 Air spring and a steel plate spring suspension vehicle compared air suspension vehicle not only improves the vehicle ride comfort, but also improve the vehicle manipulation stability and improve the tire grounding, the vehicle damage on the road down to minimum, can play a protective effect on the goods。 This thesis is mainly of electronically controlled air suspension (ECAS) gas path system, air spring and shock absorber for analysis and research, and mathematical modeling of electronically controlled air suspension (ECAS), by the simulation of MATLAB/ Simulink。

We introduced some important parts of electronically controlled air suspension (1) The Air Spring:I studies the composition of air spring, classification and some of its peculiar characteristics。 (2) Shock Absorber: introduced the shock absorber structure and unique properties。 (3) The Gas Path System:discussed gas path system in the ECAS system , and its workingprincipleare introduced。

Through the vehicle dynamics theory established simplified quarter vehicle with two degrees of freedom vehicle active suspension model, put forward active suspension fuzzy control method, to establish the dynamic model of active suspension, and build the integral form of the white noise road input model and a simulation model, and designed a fuzzy controller, and built simulation model in Siumlink, get the controlresults。