Quote :

Um, I'm not sure what you mean, but I'll try and explain it a bit better, I was in a rush last night.

Sorry to be not clear, I understood that you wrote and it proves that my FFT graph are misused and not accurate. Anyway I'll keep my tool for later if needed.

Quote :

did you scale those plots ? normally they should go up to 100 Hz

hum, I don't understand what you mean, but I can say that the scale was automatic and linear, I only display a range from 0Hz to 5Hz.

Quote :

oh and this step is just plain wrong you have to do the fft over the deflection of the suspension and not its time-derivative

and another thing from whar youve said ive gathered that you did cut out blocks from the data sets put those together and did the fft over that
is that right ? cause if you did youll get false fft results

Yep, you must be in the thruth. However, I'm not sure about FFT the deflection. I tried once and the results were weird.
What do you mean by "white"?

Quote from Shotglass :

hoiw exactly did you calculate those graphs anyway ?

Open RAF with F1perfview, export it to a csv file, import it into excel, calculate suspension velocity, export it into a FFT program, and (in my case) import FFT data in excel.

OK I think now that working FFT with LFS is useless, I can't see what I thought I could see, and as I was afraid, suspension are mainly setup with feelings and many tests, not with calculation. I'm a bit disappointed since I spend very long time for it but I'm cool now because I don't need to break my head for things I can simply do.

About tires you said that their frequency range is 5-13Hz, I think it doesn't interfere in the case of the LX4

edit: your post frozen me colcob :melting:

Last edited by Bogey Jammer, Mon 19 Dec 2005, 21:20.

Thanks!

I understand and the subject becomes very interesting.

Quote :

What is the y scale?
What data is it you've actually plotted.

y scale is in dB
One lap of the track is plotted, but all data between -0.40G and 0.40G is not included.

I think hard but I can't see the relation between weight transfer and frequency

It sounds very strange for me, I'm afraid I'll dream about this question this night lol

So, FFT analysis is only for weight transfer watching? :worried:

I'll try to FFT the curves only

Ok

The track is Fern Bay Green

The car is LX4, neutral set suspension WITHOUT antiroll bar, dampers are set to critical. Minimum loaded fuel.

Data between -0.4G and 0.40G are not analysed (I don't care about straight lines)

Hi all

I've just started to use suspension spectrum analysis to tune my spring rates.

I tried different suspension settings with the same car and the same track.

All the graphs show a natural suspension frequency peak. Sometimes it is tall but it's often small an surrounded by two or three tall peaks. What do they mean?

In short I did not managed to find myself how to interprete correctly these graph, each one has an unique shape. I didn't find the track frequency either..

Does somebody have some experience with it?

Thanks men

Yep, only with photoshop with vector shapes. The pattern too but converted it to bitmap in order to manipulate it easier (but finally it was long and hard)

I think there is 2 or 3 hundred layers in this skin illepall

Thanks a lot!


Yes, the theme is quite "weird", but I assume this fantaisy

I think I'll adapt this skin to the FZR car, there's not many heavy modification to do, and I think it will suit better than the FZ5

I only hope that next patches will not modify the texture mapping

Gwhehehe...

I've just finished my skin:








I was inspired by my avatar

The skinning technique may be simple, and I probably did some mistake but..

I'm very proud of it :lovies3d:

In fact I started to create it when the first alpha version of S2 viewer was released, but the difficulties make me finish it very lately. Photoshop was hard to learn lol. I thought I would never finish it but when someone is determined, he can accomplish many things

I'm afraid to share it since it was a very hard personal work, but it would be egoïst to keep my treasure for myself. If there's enough positive feedback, I would find a solution