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Can electric cars on the highway emulate plane-to-plane refueling?

spectrum.ieee.org

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Re: Can electric cars on the highway emulate plane-to-plane refueling?

#7

One of the next obvious steps for self-driving vehicles is “flocking” or drafting; this is an almost trivial problem once two or more vehicles are autonomously locked within a few inches of each other.

If you have a car only a few inches behind you and you spot a problem and need to emergency brake, you can't actually start braking until the car behind has started braking, otherwise the car behind will crash into the back of you.

If you have 3 cars in a row, and the first car spots a problem, it can't start braking until after the 2nd car has started, but the 2nd car can't start braking until after the 3rd car has started.

It gets linearly more dangerous as more cars are added.

Not saying it can't be done, but the problem is more subtle than just working out how to stop the cars from crashing into each other at speed: they also need to be able to brake in emergencies without crashing into each other.

Possibly the way to do it would be to mechanically couple the cars like a train, so that it is safe for the one in front to start braking earlier than the one behind, albeit with reduced performance.

Re: Can electric cars on the highway emulate plane-to-plane refueling?

#9
Asking sincerely: Why should we not simply pull over to do this? Planes obviously are a different situation, but cars can easily just stop.

While cool to imagine, it seems unnecessarily complicated and unsafe to do this in motion on the road.

[Edit: The prof and his team are quite serious about it, so I assume there must be a reason and I'm actually curious what it might be.]

Re: Can electric cars on the highway emulate plane-to-plane refueling?

#10
post #7

One of the next obvious steps for self-driving vehicles is “flocking” or drafting; this is an almost trivial problem once two or more vehicles are autonomously locked within a few inches of each other.

If you have a car only a few inches behind you and you spot a problem and need to emergency brake, you can't actually start braking until the car behind has started braking, otherwise the car behind will crash into the back of you. If you have 3 cars in a row, and the first car spots a problem, it can't start braking until after the 2nd car has started, but the 2nd car can't start braking until after the 3rd car has…

The idea is predicated on autonomous control and presumably the vehicles communicate in real time...they all brake together at the delta V of the least capable member.
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