Car dumper hydraulic system state monitoring and fault diagnosis based on adaptive MPCA
ZHANG Lijie1,2, E Dongchen1,2
1. Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University,Qinhuangdao 066004, china;
2.Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University, Ministry of Education of China,Qinhuangdao 066004, china
Abstract:Faults of the hydraulic system of car dumper occurred frequently and the faults bave a serious impact on production. Its condition monitoring and fault diagnosis has important practical significance. According to characteristics of working process of car dumper is intermittent and timevarying, adaptive multiway principal component analysis (MPCA) was used for condition monitoring and fault diagnosis. Covariance matrix was updated adaptively using the weighted recursive algorithm. Impact of new data on final model was adjusted by weight. Contribution rate of Q can not reflect the degree of deviation from normal range of each process variable that leads to inaccurate results of fault diagnosis. Parameter of principal component contribution rate t was used for fault location which directly reveals the change degree of process variables. The operation of the online monitoring system over car dumper proved that the adaptive MPCA method can accurately detect fault in time. The accuracy of fault diagnosis is up to 90% based on the t contribution rate.
张立杰1,2,鄂东辰1,2. 基于自适应MPCA的翻车机液压系统状态监测与故障诊断[J]. 振动与冲击, 2018, 37(8): 245-250.
ZHANG Lijie1,2, E Dongchen1,2. Car dumper hydraulic system state monitoring and fault diagnosis based on adaptive MPCA. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(8): 245-250.
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