Thread: tank steering
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Unread 23-06-2002, 22:27
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#0047 (ChiefDelphi)
  
Join Date: May 2001
Location: Pontiac, MI
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Re: I don't think it's preference....
Posted by Jerry Eckert.

Engineer from Looking for a team in Raleigh, NC sponsored by .

Posted on 1/10/2000 10:20 PM MST


In Reply to: I don't think it's preference.... posted by Daniel on 1/10/2000 8:43 PM MST:



: Having two joysticks really gives you optimal control over the radius of your turns. I suppose you could code the joystick so that as you move it along the x axis it uses more reverse on the side you're turning, but I still don't think it'll give you the freedom that you should have in the playing feild. There are things that should be done by the control system but I tend to think that how you drive is too dependent on your situation to leave it to a computer that can't see what's going on.

: I vote for two joysticks.

The down-side to steering with two joysticks is that it takes more practice to control the robot effectively. For many teams, practice before the competition is something that is usually hard to come by.

One trick I've used effectively on single stick robots is to use one of the joystick buttons as a shift control. When the button is depressed the maximum speed of the robot is 1/2, or even 1/3, of the full maximum. By changing the scaling of the control to the output speed, and even using non-linear control functions, you can get very good control using the single stick. Granted, it may not be as good as an experienced operator using a two-stick system, but it worked much better for our operators.

Jerry



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