Monday, July 27, 2009

Mo' Simulation

Last night I posted up some of the sim outputs, and I've been working on packaging it up in a GUI. Still not quite finished, but this is turning out pretty nice.

Now, usually, I don't do this but uh, go head' on and break 'em off wit a lil' preview of the remix....


Get to click through at any point, from straight-ahead to limit cornering and take a look at individual tire states, how saturated they are, and tweak the design from there. Pretty legit.

Some basic simulation outputs

Reworked how I want to do my suspension simulation and engineering. Have two separate programs now, one which generates the virtual suspension (almost identical to what I posted earlier) and one which post-processes the results. Right now it only works on one setup at a time, eventually I'll get a batch process working so it can crank on say 1,000 suspension iterations while I'm at work or out drinking or what have you.

1,000 iterations is surprisingly not much. And at 5-10 seconds an iteration that's about 1.5-3 hrs. I could easily come up with a test plan for 10,000 iterations.

I'll post up prettier picture when I have the post-processing GUI better set up. For now, just some examples of the outputs.




What's interesting to note, is even though the suspension setup is 100% symmetric, there is a noticeable amount of asymmetry in the results. I chalk this up to plysteer in the tires. I'll have to mitigate that with some alignment settings.

The understeer (balance) plot is a little funky as it is a function of the sign of trimmed lateral acceleration, and the results are off-centered. I'll come up with a better way to account for that.

Tuesday, July 7, 2009

Narrow nose

Oh yea. That's where it's at.

Not much activity lately... just got back from a week in Jersey and Brooklyn. Good stuff. Bartenders that give out free Guinness and Ketel One? So much win.