客车制动系统动态模型研究及试验验证#br#

针对客车气制动系统动态响应研究不足的问题，运用计算机仿真建模技术，建立了制动系统关键部件全参数仿真模型。其关键部件包含制动阀、继动阀、膜片制动气室、气压管路。在数学推导的基础之上，引入了AMESim多领域仿真建模软件，避免了复杂的多变量、非线性的数学关系推导，模型可用于客车气制动系统多参数仿真模拟与设计。为验证模型的准确性，设计了一套整车制动模拟试验台，对气制动系统动态响应和各零件响应输出协调性进行试验验证。仿真结果与试验结果对比表明两者相吻合，并分析得出了气制动系统响应迟滞的主要因素为制动气室的橡胶膜片形变引起，为气压制动系统性能研究及匹配性分析奠定了基础。

Dynamic Modeling and Experimental Verification of Bus Pneumatic Brake System

 To solve the problem of the dynamic characteristic of pneumatic brake system, the full parameter model of the pneumatic brake system is established based on the technology of computer simulation. The key brake components include the brake valve, the relay valve, the chamber and the pneumatic circuit. AMESim is introduced on the basis of mathematical derivation. So the complexity derivation of multivariable, nonlinear mathematical relationship is avoided. The model can be used for the bus brake system multi parameter simulation and design. A testing system for the pneumatic brake system is designed to verify the accuracy of the model. It can measure the dynamic characteristic and the output response coordination of each component. The results show that the simulation results can fit into the experimental results. For the deviation, the explanation and analysis are also given. An important factor derived from the response hysteresis of brake system is mainly caused by the rubber diaphragm deformation in brake chamber. The research lays the foundation for further structural optimization of brake components and fitness analysis of the pneumatic brake system.