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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Thu, 14 Dec 2000 22:29:00 GMT
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Viewed:
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1395 times
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In lugnet.robotics, "Tilman Sporkert" <tilman@webmethods.com> writes:
>
> If you are parallel and very close to an obstacle, like a curb or a wall,
> you can't get away from it with all-wheel steering.
Thanks for that explanation, everything is much clearer now. I suppose it is
to do with the line perpendicular to the vehicle coinciding with the centre
point of the turning circle; with all wheel equal steering, it will
intersect the middle of the vehicle, leading to the behaviour you described,
but with front wheel only, it will tend to be towards the back, thus causing
the vehicle to "pivot" round the rear with the sideways movement at the front.
I feel a bit daft for missing that now, in retrospect it seems obvious :-)
Jennifer Clark
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Message has 1 Reply:
 | | 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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Message is in Reply To:
| | RE: vision command idea...
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| (...) If you are parallel and very close to an obstacle, like a curb or a wall, you can't get away from it with all-wheel steering. As soon as you turn the wheel to get the front away from the wall, the back of the vehicle will smash into it. This (...) (24 years ago, 14-Dec-00, to lugnet.robotics)
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