Thread: Arc Driving
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Unread 22-01-2007, 12:53
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Re: Arc Driving

Quote:
Originally Posted by Kevin Watson View Post
Perhaps it's presumptious of me to assume that you're referring to the drawing I posted, but in case it is, Ackerman steering won't work very well because the strategy counts on the 'bots ability to do a turn-in-place, which Ackerman can't do very well. Actually, I had in mind a tank-drive setup, which can do a nice turn-in-place (with suitable wheels/tires) and driving arcs can be achieved by just driving each side at a different velocity.

If it's not my drawing you're referring to, then nevermind <grin>.

-Kevin
heh, the strategy in the picture did give me ideas. It happens to work perfect for our forklift drivetrain(easier to drive in an arc).

- Not going with Ackerman steering, so turns in place will be just fine.

Quote:
The steering system in cars is called Ackerman steering. The front wheels have to turn at slightly different angles such that the if lines drawn perpendicular to the plane of each wheel and through the center of the wheel all meet at a single point, the center of the turn. This is a pretty good article:

http://www.rctek.com/handling/ackerm...principle.html
That is very good information, however it doesn't help me with my problem as I am not using ackerman steering. Also, it doesn't give any mathematcal equations which is what I was looking for. Thanks anyway.