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Re: Problems with tuning shooters using AM basketballs on Practice Field?
We've been using an open-ended voltage control (same as 2006) for our 5-roller shooter and were very consistent throughout GSR. Even when fresh balls were put out on the field during eliminations our hybrid was as consistent as before. FWIW I think we're ranked 20-something in Hybrid OPR.
Our program essentially does this:
shooter_speed = 11/system_voltage
We tried a PID loop but couldn't ever get it to behave the way we wanted it to. The issues being that there are huge changes in friction and system inertia when a ball is engaged with the shooter, and our shooter system is slow low-inertia that the PID loop is unstable when under no load no matter how much we tuned it.
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Theory is a nice place, I'd like to go there one day, I hear everything works there.
Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
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* FIOTWOD -pronounced "FI ot wood", the first two syllables rhyme with "riot" -stands for: FIRST-is-the-only-topic-worthy-of-discussion - Joe Johnson [more] 
06-03-2012, 08:58
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