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Exciter Selection Configuration dialog box

Method
Method Specifies the exciter selection method.NMIFIdentifies the sensors which excite the most modes using a normal mode indicator functions (NMIFs) and an NMIF threshold value.DPRProvides a sorted matrix of DOFs and their driving point residue (DPR) values from which a user-defined number of optimal exciters are identified.
Settings
Available when Method is set to NMIF.
Damping Ratio (%) Specifies the damping percentage ratio that is associated with the normal modes and that is used by the exciter selection algorithm. The damping ratio should be bigger than 0.1%.
NMIF Threshold Specifies the threshold for the normal mode indicator function (NMIF) that is used by the exciter selection algorithm to find the optimum number of exciters and the optimum location for these exciters. The NMIF threshold value must be between 0.0 and 1.0. Lower value gives more exciter locations and might result in some modes not to be excited. Higher value may result in exciter locations that only excite modes weakly.
Off-Axis Angles Specifies the allowed orientation for the exciters.
Name
Name Controls the name of the exciter configuration.
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Create an exciter selection configuration

Display exciter set information

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Exciter selection configuration

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Exciter set information

Normal Mode Indicator Function (NMIF) algorithm

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Exciter Selection Configuration dialog box, Simcenter 3D 2021.1 Series

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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/id1367731 · retrieved 2026-07-17