Autocorrelation Analysis in Time and Frequency Domains for Passive Structural Diagnostics

Figure 8

Higher modal frequency estimation results of impulse response and nonstationary noise: condition 1 (a), condition 2 (b), condition 3 (c), and condition 4 (d). (Solid line: simulated observed signal; dotted line: original impulse response.)

(a)

(b)

(c)

(d)