Thread: Speed PID Function
View Single Post
  #4   Spotlight this post!  
Unread 26-01-2012, 22:37
Ether's Avatar
Ether Ether is offline
systems engineer (retired)
no team
  
Join Date: Nov 2009
Rookie Year: 1969
Location: US
Posts: 8,058
Ether has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond repute
Re: Speed PID Function
Quote:
Originally Posted by John_1102 View Post
As far as I know PID Control is normally applied to move a motor, ei. an arm or wheel to a set target/position/distance.

What I NEED to implement is a speed based PID method.
I input a rate.
In my java encoder.java class it lists a method getRate();
I suspect this works by returning......a rate which I could use to set my speed.

from the rate/speed I input... I need to implement a PID method so when voltage drops or a ball passes through the shooter I am using, the POWER % will increase to compensate to allow the shooter to hold a constant SPEED.
Not a consensus, but teams have reported success using a controller using feedforward and the "I" term of a PID.

Here are some links which may be of interest:

http://www.chiefdelphi.com/forums/sh...80&postcount=7

http://www.chiefdelphi.com/forums/sh...5&postcount=15

http://www.chiefdelphi.com/forums/sh...28&postcount=6

http://www.chiefdelphi.com/forums/sh...04&postcount=3

http://www.chiefdelphi.com/forums/sh...7&postcount=34

http://www.chiefdelphi.com/forums/sh...7&postcount=29