Description: What is the significance of phase angle in vibration? What is phase angle?
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Description: What is the significance of phase angle in vibration? What is phase angle?
Phase angle represents the relative position of a vibrating object with respect to a fixed point or with respect to another vibrating object. Consider the following example where object-1 is moving up and simultaneously object-2 is moving down from their mean equilibrium position. The motion of objects is plotted in the curve shown below. The horizontal gap between the peaks of the two curves is 180 degrees. Hence the phase angle between these two objects is 180 degrees which tells that the two objects are moving in opposite directions to each other.
Figure: Physical significance of phase angle.