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Unread 21-08-2014, 10:52
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Jared Russell Jared Russell is offline
Taking a year (mostly) off
FRC #0254 (The Cheesy Poofs), FRC #0341 (Miss Daisy)
Team Role: Engineer
 
Join Date: Nov 2002
Rookie Year: 2001
Location: San Francisco, CA
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Re: blog; Motor Controller Options for 2015

Quote:
Originally Posted by Ether View Post
Has anyone been able to find any details about the algorithm used for the built-in PID in the Talon SRX? Is it strict PID, or does it have, for example, user-selectable feedforward etc.


I would love to see a velocity PID loop with:

Selectable Frequency (though a fixed rate would be fine if it is fast enough)
User tunable P, I, D gains
User tunable Feedforward gain
User tunable Forward/reverse stiction compensation
User tunable Maximum output cap
User tunable Maximum integrator output
VERY IMPORTANT: Slave mode so that a single sensor can be used to control a multi-motor, multi-Talon mechanism (like the drivetrain). It was never really clear how to do this with Jaguars.

I do not think I would ever run a position control loop on the speed controller, but I can envision making heavy use of velocity control.
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