某一直升机齿轮箱上的早期损伤的特征是，在伴随振动信号上产生一个可变周期的非平稳扰动信号。要求按此特征构造一组有物理意义的数据仿真早期故障信号，应用小波变换技术分析故障的特征和发生时刻。-a helicopter gearbox early on the characteristics of the injury, In addition to the vibration signal produced a variable cycle perturbation of non-stationary

外文文献，介绍 风电齿轮箱相关的诊断的方法，即运用自适应小波进行诊断-Wind Turbine Gearbox Fault Diagnosis Using Adaptive Wavelet Spectrum

小波熵去噪，仿真期刊《基于小波熵的矿用齿轮箱振动信号相关去噪法》-The wavelet entropy denoising simulation journal based the wavelet entropy mine with gearbox vibration signal denoising law "