Development of an Optical Fiber Sensor Interrogation System for Vibration Analysis

Table 1

Estimated resonance frequencies and damping values.

Mode	Accelerometer		FBG sensor		Difference, in %
	, in Hz	, in %	, in Hz	, in %
First bending	22,7	1,9	22,7	1,8	0	5,3
Second bending	145,2	2,1	144,4	2,1	0,6	0
First torsion	206,5	1,5	206,6	1,4	0	6,7
Third bending	323,4	0,6	323,6	0,6	−0,1	0