双离合器自动变速器故障诊断及容错控制

摘要

针对双离合器自动变速器的系统组成,应用冗余法、搭建诊断电路法、极值法,制定包括传感器、执行机构、控制器和被控对象在内的故障诊断策略,并开发了车辆行驶状态下的在线综合故障诊断程序.将各故障分为不同等级,提出相应的容错控制方法,使车辆在发生故障时能最大限度地保持继续行驶的能力.最后,对部分典型故障下的双离合器自动变速器起步及换挡模型进行仿真,验证了所提出的故障诊断及容错控制策略的有效性.%According to system constructions of dual clutch transmission ( DCT), by using redundancy method,building diagnosis circuit method and extremum method, fault diagnosis strategies are proposed for sensors, actuators, controllers and controlled objects. A comprehensive on-line fault diagnosis program is also designed for vehicles on the running state. Tolerant control strategies are established based on different fault types so that vehicles can furthest keep running capacity. Finally, simulations for some typical faults are applied on a DCT starting and shifting model, and the effectiveness of the proposed fault diagnosis and tolerant control strategies is verified.