基于遗传算法的无绝缘轨道电路故障综合诊断方法  

A Comprehensive Fault Diagnosis Method for Jointless Track Circuit Based on Genetic Algorithm

作　　者：赵林海[1] 冉义奎[1] 穆建成 

机构地区：[1]北京交通大学电子信息工程学院,北京100044 [2]铁道部科学技术司,北京100844

出　　处：《中国铁道科学》2010年第3期107-114,共8页China Railway Science

基　　金：国家自然科学基金资助项目(60736047);国家"八六三"计划项目(0912JJ0104-XH00-H-HZ-001-20100419)

摘　　要：基于传输线理论提出机车信号感应电压幅值包络仿真模型,利用机车信号感应电压与轨道电路信号电流的线性映射关系,分析补偿电容故障对机车信号感应电压幅值包络的影响规律,给出基于遗传算法的轨道电路故障综合诊断方法。以补偿电容和道砟电阻为决策变量,以实际的和仿真的机车信号感应电压幅值包络间差值的最小化为目标,构造适应度函数,通过对种群个体进行选择、交叉和变异等遗传操作,得到当前状态下各决策变量的最优值,从而实现轨道电路故障的综合诊断。实验表明,将遗传算法引入到轨道电路的故障诊断领域,利用机车信号的实际记录数据,能够对无绝缘轨道电路中多个补偿电容故障以及道砟电阻波动等情况作出正确的综合评判,从而弥补了目前检测方法的不足,为轨道电路的故障诊断提供了新的有效手段。A transmission-line theory based simulation model of the induced voltage envelope of the cab signal was proposed.The influence law of the compensation capacitor failure on the induced voltage envelope of the cab signal was analyzed,and the comprehensive fault diagnosis method for track circuit based on genetic algorithm was proposed by utilizing the linear mapping relationship between the inductive voltage of the cab signaling and the current of the track circuit signal.In this method,with the compensation capacitor and the ballast resistance chosen as the decision variables,with the minimum difference between the envelop of the real inductive voltage of the cab signal and the envelop of the simulated signal current of the corresponding track circuit as the objective to form the fitness function,by genetic operations such as selection,crossover and mutation,the optimum value of each decision variable under current state was obtained,thus the comprehensive diagnosis of the track circuit was realized.Experiment results show that the GA method,which is firstly introduced into the diagnosis of track circuit,can give correct and comprehensive judgement by means of the actual record data of the cab signaling under the condition of multiple compensation capacitor failure and unstable ballast resistance,make up the shortage of current methods,and provide a new and effective method for track circuit diagnosis.

关 键 词：无绝缘轨道电路 故障诊断 遗传算法 补偿电容 道砟电阻 

分 类 号：U284.238[交通运输工程—交通信息工程及控制] U284.92[交通运输工程—道路与铁道工程]