4.5 Convergence Rate 
Table 2 shows the results of runs with convergence criterion AZ < 2cm for the cases AZ = 0.5 m 
and 1.25 m. 
PARAMETER PARAMETER 
ALTERATIONS ALTERATIONS 
1.8r 8274/0.5/0.001/F. 1.87 8274/1.25/0.001/F 
     
1.54 1.5 
1.01 1.04 
0.54 0.51 
  
0.0 
  
| 7 
> > NUMBER OF 
  
  
  
  
  
  
  
  
  
-0.4+ -0.4+ ITERATIONS 
a) b) 
PARAMETER ; Z.....HEIGHT (m) 
ALTERATIONS XL..LEFT X-SHIFT (pi) 
YL..LEFT Y-SHIFT (pi) 
131 8274/1.25/0.001 XR XR...RIGHT X-SHIFT (pi) 
YR..RIGHT Y-SHIFT (pi) 
1.0 + VR 
YL 
0.5 T 
XL 
HERZ Tire 
-0.3 + Z NUMBER OF 
C) ITERATIONS 
Figure 3. Alterations of the parameters versus iterations 
a) AZ=0.5 filtering 
b) AZ=1.25, filtering 
c) AZ=1.25,no filtering 
The alterations of the parameters during the iterations for the two approximate heights are shown 
in Figures 3 a), 3 b). It can be observed that: 
i) for AZ = 0.5 mthe alterations start from relatively large values and fall rapidly 
ii) for AZ = 1.25 m the starting alterations are small and increase slowly until a maximum 
alteration is reached, where the patches are in a similar position as at the beginning of 
the iterations with AZ = 0.5 m. After this maximum alteration the convergence is similar 
for both cases i) and ii) 
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