A real power pid?
12-03-2008, 09:00 PM
#1
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A real power pid? Instead of using calculated torque and playing some math on it has anyone tried to find power and torque using the fundamental dv/dt?
I tried it in excel but all I'm getting a ton of noise from the slow frame rate, gear changes, and wheel spin.
I tried it in excel but all I'm getting a ton of noise from the slow frame rate, gear changes, and wheel spin.
12-03-2008, 09:17 PM
#2
yes, it's been tried, but the lack of precision and not enough of a scanning rate kills the math, there's simply too much noise. i've tried all kinds of trend predictions, expoentially weighted moving averages, even some robust fitting and it's just simply not enough.
12-03-2008, 09:48 PM
#4
true, the scanning frequency is much better, but resolution is still an issue. with old controllers you had 10 frames with velocity going 10,10,11,11,12,12...km/hr and now with increased scanning frequency but same resolution you're gonna get 10,10,10,10,10,11,11,11,11,11... not much improvment, unless you wanna get into some smoothing. now if we could somehow get at least a digit or two of reliable resolution on the velocity, then we could actually talk about making this useful.
oh, another note, both gps and gtech ss/rr are useless as well, also nowhere near resolution, but this time on the scanning frequency portion.
oh, another note, both gps and gtech ss/rr are useless as well, also nowhere near resolution, but this time on the scanning frequency portion.
