(Pro version only)
You use the modal indicators tab to set the modal indicators used in the Stochastic Subspace Identification editor.
To enable the use of different symbols for stable/unstable modes as well as noise modes in the Stabilization Diagram of the Stochastic Subspace Identification editor you should check the box labeled Enable Mode Indication on Stabilization Diagram.
If the deviations of the Natural Frequency, the Damping Ratio, the Mode Shape MAC and of the Initial Modal Amplitude MAC all are less than the maximum allowed deviations specified in the Control Panel, then a mode is characterized as stable. You set these maximum allowed deviations in the four edit boxes of the control group called Deviations for Stable Modes between Consecutive Models. Deviations for one model are determined by comparing with the model one model order lower.
Typically, structural modes are lightly damped. This means that many modes can be excluded from the search for stable modes. The exclusion can be obtained by setting the range of the damping ratio of stable structural modes. You set this range using the two edit boxes of the control group called Expected Range of Modal Parameters. This range is characterized by a minimum damping ratio and a maximum damping ratio both specified in per cent.
When you have set the values you want to change you simply press the <Return> key.