半主动空气悬架多物理场建模与动态特性仿真.doc

文档介绍：
半主动空气悬架多物理场建模与动态特性
仿真#
徐兴1,吴越2,李仲兴2*
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(1. 江苏大学汽车工程研究院,江苏镇江 212013;
2. 江苏大学汽车与交通工程学院,江苏镇江 212013)
摘要:半主动电控空气悬架系统(Electronically Controlled Air Suspension,ECAS)由阻尼
有级可调液压减振器和空气弹簧组成,涉及机电气液相互交叉的动力学特征。在对其结构和
工作机理分析的基础上,利用热力学和流体力学相关理论建立了悬架系统的多物理场数学模
型。利用多领域仿真软件构建半主动空气悬架系统并进行系统的受迫振动特性仿真,获得不
同阻尼状态、不同激励频率和幅值下半主动空气悬架系统的综合特性输出。与此同时,搭建
半主动空气悬架的半实物试验台架,验证理论分析和多物理场模型的正确性。台架试验与仿
真结果对比分析表明,构建的多物理场数学模型能够正确反映半主动空气悬架系统工作特
性,模型仿真与试验数据基本吻合,动态特性分析为半主动空气悬架整车性能的匹配提供理
论基础。
关键词:电子控制空气悬架;阻尼切换;多物理场;动态特性
中图分类号:
Multiphysics Modeling and Dynamic Characteristic
Simulating of Semi-active Electronically Controlled Air
Suspension
XU Xing1, WU Yue2, LI Zhongxing2
(1. Automotive Engineering Research Institute, Jiangsu University, Zhenjiang, Jiangsu 212013;
2. School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013)
Abstract: Electronically Controlled Air Suspension is consisted of state-adjustable hydraulic damper
and air spring, which involves the dynamic characteristics of mechanical state, gaseous state and
hydraulic state. Based on the study of the structure and mechanism of ECAS, the thermodynamics and
fluid mechanics are used to construct the multi-physics mathematic model. The multi-domain
simulation software is used to construct ECAS. The performance of forced vibration is studied, the
overall character