【作者】 刘铁军；

【导师】 张邦成；

【作者基本信息】 长春工业大学 ， 机械电子工程， 2011， 硕士

【摘要】 汽车传动系是汽车动力传动系统中重要的安全部件,为了保证汽车行驶安全,必须对汽车传动系零部件的冲击耐久性性能指标进行检测。汽车传动系冲击耐久性试验台是完成汽车传动系性能检测的台架试验设备,能够较全面、准确地了解传动系零部件的耐冲击性能及其相关特性,对汽车传动系零部件生产厂家提高产品质量具有重要指导的意义。国外的汽车传动系性能检测设备及测试方法成熟,但其价格昂贵；国内汽车传动系性能检测设备部分实现了自动化,但是技术还不成熟,检测精度、可靠性与自动化程度低。在吉林省重大科技攻关项目“汽车传动系冲击耐久性试验台的研制”的支持下,开展了试验台控制与检测系统的关键技术研究。在深入研究国内外汽车传动系性能检测设备的基础上,研究开发了汽车传动系冲击耐久性试验台的控制与故障诊断系统。试验台由主机、控制与测试系统、故障诊断系统三大部分组成。试验台采用工控机作为上位机,PLC作为下位机,上、下位机通过串口进行通信,实现对系统的动作控制、现场监控与数据处理。转速控制系统是试验台控制的关键,针对转速控制系统干扰力矩较大和控制精度要求高的情况,建立了转速控制系统的数学模型,将模糊控制鲁棒性强与PID控制稳态误差小的优点结合起来,设计了模糊PID控制器对转速进行控制。仿真实验表明,相对于PID控制,提高了试验台转速控制的精度。为了提高试验台的安全可靠性,深入分析了试验台的故障产生机理,结合试验台故障实际情况,基于小波分析理论和卡尔曼滤波理论设计了试验台故障诊断系统。较好地解决了试验台故障诊断问题。仿真实验验证了采用的故障诊断方法的有效性和实用性。基于LabVIEW开发了试验台控制与故障诊断系统软件,实现了系统的数据采集、数据处理、数据分析、试验台控制、故障诊断等功能。设计开发的控制与故障诊断系统经过实验及实际应用验证,各项性能指标满足控制系统设计要求,测试精度和测试效率高,系统运行稳定可靠,性能达到了国外同类产品的水平。更多还原

【Abstract】 Automobile power train is the important safety component of automobile dynamic transmission system. In order to ensure the security of automobile driving, it is important to test the impacting durability performance index of automobile power train components. The automobile power train impacting durability test rig is the test equipment to test power train performance, which can comprehensively and exactly test the impacting performance and relative characteristic of power train components. It has great meaning for helping automobile power train component manufacturers to improve product quality. The foreign automobile power train performance testing equipment and testing method are mature, but price is high. Although domestic relative testing equipments have been partly automated, the technique is still immature, testing precision、reliability and degree of automation are also low. The topic of this paper is from the development of automobile power train impacting durability test rig, the office of Science and Technology, JiLin Province. On the base of studying automobile power train performance test rig in a deep going way, and the system of controlling and testing is researched and designed in this thesis.Test platform includes three parts:the host, Control and testing system, fault diagnosis system. Test platform be used of IPC and PLC control computer are connected by Serial communication interface, to realizing system control, monitoring and data processing. Speed control system is a key element of test control and speed control system, According to disturbing torque greatly and control accuracy requirement highly is established by Mathematical modeling of speed control system, combining the advantages of the fuzzy control strong robustness and PID control steady-state small error to design fuzzy PID controller. Simulation results show that compared with PID controller, the fuzzy PID controller can improve the precision of test speed control.In order to improve the safety and reliability, combining with the actual situation and analysis of the failure mechanism of the test bench, a test bench fault diagnosis system is designed on the basis of wavelet analysis theory and Kalman filtering which can better solve the fault diagnosis questions. The simulation results verify the effectiveness and practicability of the method of fault diagnosis.Based on Lab VIEW, the test control and fault diagnosis system software is developed to carry ou data acquisition, data processing and data analysis, test bench control and fault diagnosis functions and so on. The experiment and practical application demonstrates that all performance factors of the designed control and fault diagnosis system satisfy design requirements of control system, the detection precision and detection efficiency are high, and the system can run stablely and reliablely. The performance can reach the the level of foreign products.更多还原