frequent fault meaning in English

常见错误

Analysis on the frequent faults of electronic weighted type coal feeder
电子称重式给煤机的常见故障分析
Frequent fault diagnose and repair of the turbine speed reducer in portal crane
门机蜗轮减速箱常见故障的诊断及维修
The main research in this thesis can be summarized as follows : ( 1 ) the structure and features of tc620 turbo cycling compressor are introduced . its frequent faults , fault mechanism and diagnosis are also analyzed . ( 2 ) the vibration signal analysis based on fault analysis and processing are presented , including wave analysis , tarce analysis , frequency spectrum analysis etc . and connected signal transformation ideas are also described , which can be conducted in amplitude field , time field and frequency field according to different needs
本文主要包括以下内容： ( 1 )介绍了tc620透平循环压缩机的结构特点，归纳总结了其常见的故障现象，分析了各类故障产生的机理和诊断方法； ( 2 )论述了基于故障分析处理的几种常用的振动信号分析法，如波形分析、轨迹分析、频谱分析等。