5 10 15 20 25 30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Consistency Diagram Frequency (Hz) Model Iteration cluster pole & vector pole frequency conjugate non realistic 1/condition Figure 8. Bridge Example: Consistency Diagram - Pole Density = 4 5 10 15 20 25 30 0 2 4 6 8 10 12 14 Pole Surface Consistency Imaginary (Hz) Zeta (%) cluster pole & vector pole frequency conjugate non realistic 1/condition Figure 9. Bridge Example: Pole Surface Consistency - All Poles The following plots, Figures 10 and 11, are a presentation of the statistical distribution of the pole information for four of the clusters shown in Figure 9. In Figures 10 and 11, the black stars are the original pole estimates and the red star represents the mean pole calculated from the cluster of pole estimates. The large red circle is the one standard deviation radius. The green 395
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