What is Averaging Time & Data Reduction Factor in Frequency-Weighted Acceleration?

[GDU]

I have to analyse the Ride Comfort Data of one vehicle (as per ISO2631-1). It has Acceleration levels of driver seat in X, Y, Z directions.

I need to plot Frequnecy Weighting in dB vs Frequency in Hz. Data is recorded at 500 Hz for 9.95 secs.

How much Averaging time & Data Reduction Factor should i take and how to convert them in as above said graph.

[cs_BOT]

Hi,

Your total data is 500*9.95 =  4975 points which should be fine in DIAdem as it can take millions of data points.

Can you provide more information on your problem. For example what is ISO2631-1 and how will you get frequency weighting in dB and also why is the factoring required?

[GDU]

In ISO2631-1 it says that while analysing the data you should take weighing factors for seating condition. For driver seat it is 1 it is also mentioned in Frequency Weighted Averaging in Diadem as Wk & Wd etc in signal analysis.



Output should come as Frequency weighted RMS of individual X, Y , Z and combined RMS of X, Y , Z. for that i need to know the "Averaging Time Constant Required" & Data Reduction Factor. As changing any of these will change the results.



I need to have one final RMS value of X, Y, Z representing the ride comfort of that vehicle & If possible combined RMS too.



And how to change that value to dB. I know how to do it manually by taking a reference value and taking log with base 10 by dividing by reference value.