三分之一倍频程函数，将时程结果进行1/3倍频程分析，得到振级结果(octave analysis, which carries out 1/3 octave band analysis for a time-domain signal and converts it into vibration level resutls)

matlab振动试验数据分析，信号获取：测量获取设备的信号（振动、转速、过程参等）。信号分析：从信号中提取反映设备运行状态和故障的特征值。故障诊断：根据信号特征信息，对故障进行诊断（专家诊断、智能自动诊断）和预测(Matlab vibration test data analysis, signal acquisition: Measurement and acquisition of equipment signals (vibration, speed, process parameters