There are three method of analysis vibration in rotating components.

i) Angular Vibration: This method utilizes the change in rotational speed over individual rotations, it is also called as Torsional Vibration.

ii) Twist: Difference in rotation between the two points of the shaft.

iii) General Noise and Vibration of Rotating Components: This uses tachometer and other noise, vibration signal of the system to study the general characteristics of the rotating component.

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