Complete Inverse Method Using Ant Colony Optimization Algorithm for Structural Parameters and Excitation Identification from Output Only Measurements
Table 4
Identified results with noise-pollution measurements.
Case 1
Case 2
Case 3
Case 4
Parameters and its real values
(Noise = 1%)
(Noise = 5%)
(Noise = 10%)
(Noise = 15%)
Error (%)
Error (%)
Error (%)
Error (%)
271390
271212
−0.07
270655
−0.27
267110
−1.58
251259
−7.42
290360
290206
−0.05
288793
−0.54
288103
−0.78
273108
−5.94
282690
282877
0.07
281526
−0.41
278466
−1.49
276999
−2.01
252480
252271
−0.08
252238
−0.10
249497
−1.18
246445
−2.39
233540
233605
0.03
232816
−0.31
230917
−1.12
229261
−1.83
229940
229767
−0.08
229776
−0.07
230418
0.21
222248
−3.35
2469.65
2451.16
−0.75
2484.77
0.61
2061.82
−16.51
1591.87
−35.54
2874.56
2878.74
0.15
2865.31
−0.32
3047.32
6.01
3293.65
14.58
2572.48
2564.28
−0.32
2601.61
1.13
2124.07
−17.43
2192.95
−14.75
2297.57
2297.05
−0.02
2273.31
−1.06
2468.87
7.46
2490.99
8.42
2265.33
2266.12
0.03
2246.78
−0.82
2231.8
−1.48
2191.78
−3.25
2092.45
2095.25
0.13
2107.04
0.70
2134.34
2.00
2038.22
−2.59
200
300
200
300
For all cases, identical initial values range [1, ] is used for all stiffness and damping parameters; : identified parameter vector; Error: relative error, : number of sampling points used.