MTK Philosophy
The overall goal of the MTK is to help perform modal testing tasks quickly and efficiently by providing the user with a toolbox of MATLAB-based functions and GUIs. This user guide and user documentation will use the following set of nomenclature throughout.
- Subscript “t” corresponds to “test”
- Subscript “g” corresponds to “analysis” or “g-set”
- Subscript “a” corresponds to TAM or “a-set”
- Subscript “syn” corresponds to synthesized from test results
- Subscript “_exp” corresponds to back expansion
- Subscript “e” corresponds to “enhanced”
- s- Shapes
- st – Test shapes
- st_exp – Back-expanded test shapes
- sg – Analysis shapes (G-set)
- sa – TAM shapes (A-set), shapes from eigenvalue solution of TAM matrices
- Ott – Test shape self-orthogonality
- Otg – Test shape/Analysis shape cross-orthogonality
- Oag – TAM shape/Analysis shape cross-orthogonality
- PO – Psuedo-Orthogonality
- POgg- FEM un-scaled self-orthogonality
- MAC- Modal Assurance Criterion
- MACtt – Test shape self-MAC
- MACtg – Test shape/Analysis shape cross-MAC
- MACag – TAM shape/Analysis shape cross-orthogonality
- CTable – Comparison Table
- CTableOtg – Comparison table based on Test shape/Analysis shape cross-orthogonality
- CTableMACtg - Comparison table based on shape/Analysis shape cross-MAC
- f –frequency response functions (FRF)
- ft – Test measured FRF
- fg- Analysis generated FRF (usually imported)
- fsyn – Synthesized FRF from extracted test mode shapes
- fe – Enhanced FRF
- TAM – Test Analysis Model Matrices
- TAM.aset- imat_ctrace of “a-set” DOF
(often the “test set”)
- TAM.oset- imat_ctrace of unmeasured Test Display Model DOF
- TAM.mass- Mass matrix corresponding to a-set DOF
- TAM.stiffness- Stiffness matrix corresponding to a-set DOF
- TAM.constraint- Back expansion matrix estimating o-set DOF from measured a-set DOF.