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Unread 02-03-2016, 13:55
Ben Wolsieffer Ben Wolsieffer is offline
Dartmouth 2020
AKA: lopsided98
FRC #2084 (Robots by the C)
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Join Date: Jan 2011
Rookie Year: 2011
Location: Manchester, MA (Hanover, NH)
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Re: Bang-bang using Talon-SRX and PID for a Shooter

Quote:
Originally Posted by cjl2625 View Post
I found the PID + Feedforward (built into the SRX) to work great on speed control. In fact, I got great results with purely P and F. It spins up fast, goes right to the target speed, and doesn't make the same disconcerting noises that I experienced with bang bang.
This is what we are currently using, though I have some experimental code that uses the pseudo-bang-bang I described before. Ours sits around +-50 RPM from the target, which turned out to be good enough for our shooter.

Also, this paper and its discussion has some good information about shooter control: http://www.chiefdelphi.com/media/papers/2663
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2016 North Shore District - Semifinalists and Excellence in Engineering Award
2015 Northeastern University District - Semifinalists and Creativity Award
2014 Granite State District - Semifinalists and Innovation in Control Award
2012 Boston Regional - Finalists