A contact status diagnosis algorithm for train onboard relays is proposed to address the ac-curate diagnosis of relay contact status onboard trains.By first analyzing the failure mechanism of train on-board relay contacts,conducting relay lifespan tests under simulated loads,and collecting coil current and contact voltage data during the operation process,a set of 8 parameters including overshoot time and pull-in time are selected as the characteristic parameters for relay contact status determination.Based on the degradation of overshoot time in train onboard relays,the relay status is divided into 5 stages,and a classifi-cation model is established using Principal Component Analysis(PCA)and logistic regression.The valida-tion dataset is used to verify the relay contact status diagnosis model for train onboard relays,and the re-sults show that this method can achieve accurate diagnosis of the relay contact status for train onboard re-lays.
关键词
列车车载继电器/触点状态/寿命试验/主成分分析/逻辑回归
Key words
train on-board relay/state of contact/relay life test/PCA/logistic regression
维普
万方数据