On the basis of bench tests, the relationship between the vibration signal and the state of the gear coupling of the Mi-26 helicopter is shown. By the methods of spectral transformations and Hilbert–Huang transform, informative signs are established that characterize the wear of teeth and splines. The results obtained can be used in the on-board diagnostics system of the helicopter to determine the residual life and the critical state of gear couplings.

中文翻译：

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直升机传动齿轮联轴器的基于振动的诊断

根据工作台测试，显示了Mi-26直升机的振动信号与齿轮耦合状态之间的关系。通过光谱变换和希尔伯特-黄变换的方法，建立了表征牙齿和花键磨损的信息性标志。所获得的结果可用于直升机的机载诊断系统中，以确定齿轮箱联轴器的剩余寿命和临界状态。