Online Structural Health Monitoring and Parameter Estimation for Vibrating Active Cantilever Beams Using Low-Priced Microcontrollers

Table 3

Verification experimental results (mean EKF estimates at = 40–80 s).

Experimental setting	0 g	16 g	50 g	99 g	195 g	246 g	345 g
Periodogram estimate (Hz)	2.289	2.239	2.214	2.139	2.015	1.940	1.841
EKF estimate (Hz)	2.261	2.238	2.209	2.131	2.014	1.945	1.835
Abs. difference (Hz)	0.028	0.001	0.005	0.008	0.001	0.005	0.006
Percentual difference (%)	1.22	0.04	0.023	0.37	0.05	0.26	0.33