View Single Post
  #13   Spotlight this post!  
Unread 05-07-2016, 23:57
Ether's Avatar
Ether Ether is offline
systems engineer (retired)
no team
 
Join Date: Nov 2009
Rookie Year: 1969
Location: US
Posts: 8,026
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: Good way to bring shooter to exact speed?

Quote:
Originally Posted by GeeTwo View Post
...If M is a bit high (results in a speed greater than the acceptable variation from the desired speed), this would result in the same tiny overshoot followed by a decay ramp* towards a speed greater than that desired.
You don't ramp "towards a speed greater than that desired". You ramp toward the setpoint S, by reducing (or increasing) Y. When you cross the setpoint, the sign of the error changes, and Y is adjusted.

Quote:
Originally Posted by GeeTwo View Post
The speed will never again cross the desired speed
Y will be integrated in the proper direction until the sign of the error changes. You will cross the setpoint.


Reply With Quote