Subject:
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Re: vision command idea...
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 18 Dec 2000 17:23:01 GMT
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Original-From:
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J Austin David <austin@+AntiSpam+havoc.gtf.org>
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Reply-To:
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austin@STOPSPAMMERSgtf.org
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Viewed:
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1675 times
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> Another problem with all wheel steering is the problem of "switch over."
> Honda had a prototype of an all wheel steering car which used the mechanism
> of turning the wheels in opposite directions at slow speeds for improved
> turning radius and turning the wheels in the same direction at high speeds
> for improved performance. The problem arose when the car was at the "switch
> over" point. Which way should the wheels turn? What happens when the
> driver turns while accelerating? It turns out to be non trivial and Honda
> abandoned the experiment.
For our purposes, this may not matter. However, couldn't the rear
wheels be steered with a reciprocator? So as the steering wheel
turns to the right, the rear wheels start turning right, then turn
back to the left? So at, say 1/4 turn, the rear wheels are turned
t the right, at 1/2 are back even (straight), and at 3/4 or better
are turning left?
This would have the overall effect of letting the car "slide" when
the wheel is turned only a little, but it would turn pretty sharp at
higher angles.
At faster speeds (highway) we tend to only use the wheel a little
bit (lane changes), and at very low speeds quote a bit (parking,
dodging pedestrians). Maybe I'll retrofit the supercar ...
---
J Austin David austindavid.com austin@gtf.org
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Message is in Reply To:
 | | Re: vision command idea...
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| Another problem with all wheel steering is the problem of "switch over." Honda had a prototype of an all wheel steering car which used the mechanism of turning the wheels in opposite directions at slow speeds for improved turning radius and turning (...) (24 years ago, 15-Dec-00, to lugnet.robotics)
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