Table 1 Estimation error for the second-order model’s visco-elastic parameters
| \(\hat{\varvec{{\lambda }}}_{\text{LSM}}\) | \(\hat{\varvec{{\lambda }}}_{\text{KF}}\) | ||
|---|---|---|---|
| \(\mathtt {Mean}(\varvec{{\rho }})\) | 4.2E−3 | − 1.4E−2 | Nm |
| \(\mathtt {RMSE}(\varvec{{\rho}})\) | 2.1E−1 | 2.5E−3 | Nm |