Cornering Power on Herb Adams

[Necrobata]

Hey guys!! Ive been in the Tire selection for our prototype and i read a good way to select them using the vertical and lateral loads to create a "Performance" graph.

I read it on the Herb Adams "Chassis Engineering" in the first chapter. If you see it, it is represented as a Logarithmic curve, so i grabbed my TTC Fy and Fz and Graphed it (i dont know if thats the correct verb, correct me if im wrong).

What i get from graphing it, its a 25000 point stairlike graph, i mean it, it looks like a staircase, soooo i guess i need to find the best curve that can represent those values.

Soooo, i need to make an arrangement and i think the Logarithmic is the best choice for it because it cant be lineal (acording to the shape of the curve in the book), not potential or exponencial cuz it cant go to the infinite, am i pissing in the right place? is this correct?

Thanks!

Angelo S.

[Ben K]

Note: I am not a crazy suspension guy...so take what I say with a grain of salt.

My advice would be to use Matlab's built in curve fitting toolbox, or excel's curve fitting options and figure out what works best.

Ben

[Necrobata]

Fitting was the word! excels fitting!, well, the only curve that fits better is the Log.. soo im gonna continue using it until someone has an opposite argument http://fsae.com/groupee_common/emoticons/icon_smile.gif

Thanks Ben!

[BillCobb]

The only tires I've ever seen that fit well using logs were Fred Flintstones. (Barney's, too as I recall).

You'll need to do better than that. Please keep in mind that the start of tire optimization begins with the functional modeling of a pair of tires. Then sets of pairs of tires......

[HenningO]

Bill, when is your next stand-up comedy appearance, I need to get some tickets!

The software OptimumT is a purpose built software for just that task. It also comes with a FSAE discount!

http://optimumg.com/OptimumGWe...e/AboutOptimumT.html (http://optimumg.com/OptimumGWebSite/Software/AboutOptimumT.html)