Fiber Bragg Grating Smart Material and Structural Health Monitoring System Based on Digital Twin Drive

Table 1

Corresponding strain errors.

Actual strain (με)	Wavelength change (nm)	Sensitivity relative error (%)	Strain error (με)
100	0.12	0.008	0.08
1000	1.2	0.077	0.77
10000	12	0.774	7.74
20000	24	1.548	15.48