Figure 3. The exact (f1 and f2) and estimated (f1 and f2) external forces using displacement measurements with σ1 = 0.07 and σ2= 0.13 in numerical test case 1.
Figure 4. The exact (f1 and f2) and estimated (f1 and f2) external forces using displacement measurements with σ1 = 0.35 and σ2= 0.65 in numerical test case 1.
Figure 5. The exact (f1 and f2) and estimated (f1 and f2) external forces using displacement measurements with σ1 = σ2= 0.0 in numerical test case 2.
Figure 6. The exact (f1 and f2) and estimated (f1 and f2) external forces using displacement measurements with σ1 = 0.09 and σ2= 0.1 in numerical test case 2.
