基于BP网络快速诊断电视电路直流故障  

Neural Network Approach for DC Faultdiagnosis in TV Circuits

作　　者：张友能[1] 罗军[2] 

机构地区：[1]安徽工贸职业技术学院计算机系,安徽淮南232001 [2]解放军炮兵学院信息工程系,安徽合肥230000

出　　处：《现代电子技术》2003年第8期12-15,18,共5页Modern Electronics Technique

摘　　要：测后诊断速度和诊断精度是电视直流故障诊断性能的重要衡量指标。文中将神经网络的自学习和分类技术应用于电视电路直流故障诊断中 ,把反向传播 BP网络训练成一个故障学习库。考虑到元件参数容差对诊断的影响 ,提出优选训练样本的具体方法。此外 ,为实现快速诊断 ,重新定义了 BP网络输出误差函数 ,提出了可变步长的快速选择方法。通过仿真实验 。For analog TV circuit DC fault diagnosis, the postfault diagnostic speed and the diagnostic accuracy are the main of its performance In the paper, the selflearning ability and the classification function of the artificial neural network have been used to TV circuit DC fault diagnosis, training a back propagation (BP)network as a fault learningbase The specific method for optimally selecting the training patterns has been presented with the element parameter tolerances taken into account Furthermore, for realizing to diagnose fault fast, the output error function of Bp network has been redefined and the iteration steps are given Simulation results demonstrate that the neural network approach is the method that realize to diagnose TV circuit DC fault fast

关 键 词：电视直流电路 故障诊断 BP网铬 故障学习库 神经网络 

分 类 号：TN949.7[电子电信—信号与信息处理] TP183[电子电信—信息与通信工程]