| FEM | Finite element model |
| DOF | Degree of freedom |
| IRS | Improved reduced system |
| IRS-z | The z-order improved reduced system |
| GI | Generalized inverse |
| FGI | Feedback generalized inverse |
| FEM | Finite element model |
| DOF | Degree of freedom |
| IRS | Improved reduced system |
| IRS-z | The z-order improved reduced system |
| GI | Generalized inverse |
| FGI | Feedback generalized inverse |