Obtaining damping ratio from transfer function

[suktan]

Hello,

I want to obtain damping ratio from the transform function. What should I do with the DDP/UDDP?

Thank you.

[VirtinsTech]

The free vibration decay curve method requires MI full package. To enable damping ratio measurement using this method, right click anywhere within the oscilloscope window and select [Oscilloscope Processing]>"Damping Ratio", the corresponding DDPs are DampingRatio_A and DampingRatio_B.

In the half-power method, the damping ratio can be derived using ([BandWidthHighLimit_A(Hz)]-[BandWidthLowLimit_A(Hz)])/2/[f1Freq_A(Hz)] for Channel A. This formula can be used to define a UDDP.

[suktan]

I need that for the spectrum analyzer in transfer function mode. I am using a shaker instead of an impact hammer to excite the device. Hence, I want to get peak freq and 3dB bandwidth in DDP for the transfer function.