【作者】 王智深；

【导师】 李刚炎；

【作者基本信息】 武汉理工大学 ， 机械电子工程， 2012， 博士

【摘要】 客车气压制动系统是客车行驶安全性的关键部件,系统因气体的微泄漏(如接头不紧密或管路微孔)将导致气压不足,出现系统欠压现象,这将严重影响客车行驶过程的制动稳定性,并使客车存在安全隐患。论文针对因微泄漏造成的欠压状态,系统深入地研究客车气压制动系统的欠压补偿制动控制问题,以实现提高客车在欠压状态下行驶安全性能的目的。论文的主要研究工作如下：(1)针对客车气压制动系统的结构特点和故障特征,提出客车气压制动系统欠压制动的概念,采用理论计算与试验相结合的方法,定量分析客车气压制动系统欠压制动所带来的客车行驶安全问题。(2)在对客车气压制动系统制动管路及主要部件进行分析的基础上,建立因泄漏造成的欠压状态下客车气压制动系统制动压力特性模型,研究客车气压制动系统的泄漏对制动压力特性的影响,重点分析对最终稳定的制动压力及延迟特性的影响。(3)基于对欠压状态下客车气压制动系统的制动特性与稳定性控制问题的分析,建立客车气压制动系统欠压制动控制的7自由度动力学模型,并对所建模型进行验证,利用所建模型对欠压状态下客车气压制动系统的制动特性进行仿真分析。(4)基于客车气压制动系统欠压制动控制的车辆动力学模型,利用差动制动与滑模控制的方法,提出客车气压制动系统欠压补偿控制的控制策略,设计客车气压制动系统欠压补偿控制器,实现欠压状态下的客车气压制动系统制动控制。(5)利用CAN总线控制技术,设计客车气压制动系统欠压补偿控制网络,搭建客车气压制动系统欠压补偿控制网络的试验平台,并对其进行网络性能测试。论文以某客车为对象,采用MATLAB/Simulink对客车气压制动系统欠压补偿控制的控制效果进行仿真分析；结果显示,本文所研究的客车气压制动系统欠压补偿控制方法对处于欠压状态下的客车气压制动系统制动稳定性控制具有较好的控制效果。更多还原

【Abstract】 Air brake system of the bus is one of its critical components about driving safety,underpressure state due to micro-leakage such as the loose joints or micropore of pipeline will seriously affect the braking stability of the bus driving process, and security risks exists. Thesis focuses on underpressure state caused by the micro-leakage, air brake system of bus and its brake control problem are studied deeply, to improve the bus safety performance in underpressure state. The main research work are as follows:(1) Aimed at the failure features and the structural characteristics of bus air brake system, the concept of underpressure brake of bus air brake system is put forward,using the method of theoretical calculations and experimental analysis, the bus driving safety issues brought by bus air brake system in underpressure state is analyzed.(2) Based on the analysis of brake pipeline and main components of bus air brake system, brake pressure characteristic model of bus air brake system in underpressure state due to leakage is built, impact of leakage to brake pressure characteristics of bus air brake system is studied, focusing on the analysis of final stable brake pressure and delay characteristics.(3) Based on the analysis of the braking characteristics and stability control for bus air brake system in underpressure state, the7-DOF dynamic model of underpressure brake control for bus air brake system is built and validated, simulation and analysis are carryied out for braking characteristics of bus air brake system in the underpressure state using the model.(4) Based on the underpressure brake control model of bus air brake system, using differential brake and sliding mode control method, the underpressure compensation control strategy of bus air brake system is put forward, the underpressure compensation controller of bus air brake system is designed to achieve the brake control in the underpressure state.(5) Using the CAN bus control technology, underpressure compensation control network of bus air brake system is designed and its test bench is built, and network performance test is carried out. Targeting a type of bus, using MATLAB/Simulink to simulate and analyze the effect of underpressure compensation control of bus air brake system, the results show that the underpressure compensation control method in this study is effective for braking stability control of bus air brake system in underpressure state.更多还原