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Obtaining damping ratio from transfer function
Posted: Thu Sep 11, 2025 2:08 pm
by suktan
Hello,
I want to obtain damping ratio from the transform function. What should I do with the DDP/UDDP?
Thank you.
Re: Obtaining damping ratio from transfer function
Posted: Fri Sep 12, 2025 7:02 pm
by 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.