Calculating the weighted RMS acceleration (ISO 2631)
Calculating the weighted RMS acceleration (ISO 2631)
(OP)
Hello everyone!
I simulated the vertical acceleration of a tractors cab with a semi active damping system. The model works perfect, but need to be optimized. For this, I need to analyse the vertical acceleration using the frequency weighted RMS acceleration according to the ISO 2632. The explanation is extremely complicated since they explain the complete mathematic theory.
My model delivers a ASCII table with the vertikal acceleration, and through a Fourier Transformation I get the frequency spectrum but not the actual acceleration for each frequency.
Could someone point me to a website where its explained how to calculate the RMS acceleration?
Thanks!
Claudio
I simulated the vertical acceleration of a tractors cab with a semi active damping system. The model works perfect, but need to be optimized. For this, I need to analyse the vertical acceleration using the frequency weighted RMS acceleration according to the ISO 2632. The explanation is extremely complicated since they explain the complete mathematic theory.
My model delivers a ASCII table with the vertikal acceleration, and through a Fourier Transformation I get the frequency spectrum but not the actual acceleration for each frequency.
Could someone point me to a website where its explained how to calculate the RMS acceleration?
Thanks!
Claudio





RE: Calculating the weighted RMS acceleration (ISO 2631)
RE: Calculating the weighted RMS acceleration (ISO 2631)
To get the overal G value integrate the PSD surve. Be careful the axis are in Log-Log format and integration is not strightforward.
Regards
Dave
RE: Calculating the weighted RMS acceleration (ISO 2631)
You also have to multiply the g^2 value by the bandwidth of the filters (or frequency resolution if digital) to get the RMS. So, using your number, if the bandwidth was .2 hz then you would have .02 g^2/hz * .2 hz = .004 g^2.