Figure 13
From: Application of Instantaneous Rotational Speed to Detect Gearbox Faults Based on Double Encoders
![Figure 13](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs10033-019-0324-z/MediaObjects/10033_2019_324_Fig13_HTML.png)
Signal of instantaneous transmission ratio for the intact gear. a Waveform of the intact gear, b Spectrum of the intact gear
From: Application of Instantaneous Rotational Speed to Detect Gearbox Faults Based on Double Encoders
Signal of instantaneous transmission ratio for the intact gear. a Waveform of the intact gear, b Spectrum of the intact gear