摘要
基于机械式自动变速器(Automated manual transmission,AMT)自动变速系统混杂特性,对AMT自动变速系统故障诊断技术进行研究。运用混杂自动机建立AMT自动变速系统模型,结合系统运行特点研究系统行为轨迹,分析混杂系统模型与行为轨迹之间一致性关系。分析AMT自动变速系统故障定义,结合混杂系统模型提出AMT混杂系统故障行为的定义。通过混杂系统故障行为轨迹,分析故障可诊断性条件,从系统故障模型和故障阈值条件的角度描述故障、可诊断性、诊断精度、系统可观测状态变量之间的关系,并运用故障熵的概念来描述故障可诊断的程度。从系统功能、系统轨迹、系统控制周期多角度对AMT混杂系统行为轨迹进行分析和划分类型,结合国际故障诊断参考流程提出AMT自动变速系统故障诊断策略。将故障诊断策略和诊断算法移植于实车平台,大量实车里程验证了该策略的正确性和实时性。
Automated manual transmission（AMT） fault diagnosis based on hybrid system characteristic is studied.The hybrid automata are used to build AMT automatic transmission system model and analysis is made on the consistent relationship between the behavior of trajectories and the hybrid system model.The fault definition of AMT automatic transmission system is analyzed and the fault behavior of AMT hybrid system is defined by the hybrid system model.The fault diagnosability of the hybrid system is studied based on the fault behavior of the AMT hybrid system.The relationship between fault,fault diagnosability,fault diagnostic accuracy and measurable system state variables is explained by the system trajectories and the concept of fault entropy is used to describe the degree of fault diagnosability.From the AMT system function,system model trajectories and control cycle perspective the behavior of AMT hybrid system is analyzed and classified to raise AMT automatic transmission system fault diagnosis strategy.The fault diagnosis strategy with the diagnostic algorithm is transplanted to the real car platform and a large number of vehicle mileage prove the strategy＇s correctness and real-time.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2012年第19期72-79,共8页
Journal of Mechanical Engineering
基金
国家高技术研究发展计划资助项目(863计划
2011AAllA252)
关键词
故障诊断
混杂系统
机械式自动变速器
Fault diagnosis Hybrid system Automated manual transmission
