2 ways to measure Understeer and Oversteer on a racecar.

The best understeer and oversteer sensor should be the driver.
Here's another way.
Racecar Data Analysis with AiM: academy.yourda...
For more visit - www.yourdatadr...
#motorsport #datadriven #racingdriver #understeer #aim #howto

[@garywood465]

Thanks for this, an interesting idea, can I ask how you account for the speed variation? Are you looking at the steering input relative to the GPS location so as to avoid the speed variation between going slowly for the no slip and then to get a full speed response?

[@YourDataDriven]

Yes this is a fairly common approach when you have a steering trace. If I understand your question correctly, you don't need to account for the location or the speed. What this is try to help you with is a reference to compare your fast lap steering trace too. If you don't have this you can see you're turning left or right but you can't see if that is with understeer or not. What this is trying to do is say, to driven on the racing line with a perfectly neutral car your steering trace would look like this. Therefore if you actual steering trace doesn't look like that, then you can infer that your car is pushing or is loose. Does that make it any clearer?

[@garywood465]

@@YourDataDriven Thank you for the quick response and apologies if I have miss understood. When you say you don't need speed or location, how do you compare the traces please? If one is a slow lap to avoid slip, and then one is fast, they will take a different amount of time/input to complete the steering event, as such I was wondering how you compare them directly, is it just the peak steering value in the corner. Apologies if I have completely missed this.

[@YourDataDriven]

@@garywood465 Oh sorry you're right, I misunderstood. In the analysis software for your data system you need to use distance (or location) on the x axis so that the steering traces line up. Some systems also allow you to create another trace which just shows you the difference - one minus the other. Hope that helps?

[@garywood465]

@@YourDataDriven Thank you, that makes a lot of sense now. I appreciate the quick response as well as the very interesting content!