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The wheel speed is stabilised with 3 mechanisms to control
and reduce your feet sliding forward or backwards.
First, the wheels on both feet are connected by a mechanical
linkage that goes up each leg through a conduit. The linkage
makes them spin at the same speed. This helps prevent feet
sliding
apart in a forward backward direction.
Second, the mechanical linkage also connects to a geared
flywheel, to resist rapid changes in wheel speed. This helps
prevent both feet suddenly sliding out from under you
together, or one sliding out from under you while the other is
off the ground.
You can propel yourself forward in two ways: pushing
diagonally as with regular skates, or by using a normal
walking motion.
Skating sort of takes a bit more effort than normal as the
flywheel causes resistance to your increase in speed. On the
other hand it also resists decrease in speed.
With the parts so far, a walking motion would not move you
as far as walking normally, as the flywheel would allow your
foot to slip backward. To prevent this while walking from a
standstill, the third mechanism is a ratchet on the flywheel
preventing it from turning backwards.
You have to put up with the lesser walking progress when
walking from a roll. But you get it on top of the roll
movement.
There is a gear change mechanism (safely adjustable only
while stationary) to change how much the flywheel resists
wheel speed changes. Lower resistance makes skating easier,
and deliberate speed changes easier, higher resistance makes
you more stable and makes walking from a given roll speed
more effective.
Drawing
http://www.sockstar...abilised-skates.png [caspian, Jul 05 2015]
3 things your current skates are doing wrong
http://www.sockstar...-stabilised-skates/ Advocating it clickbait-style [caspian, Jul 05 2015]
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I am envisioning the mechanical linkage. I imagine the drive chain from each wheel meet where ones legs meet. There are other things already occupying that property which might not want to be roommates with spinning chains and geared flywheels. |
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Or maybe these come up to meet in a backpack like device? |
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I am feeling envisionally challanged. Caspian can you draw a picture? |
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Direct mechanical linkage - energetically efficient. |
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Motor/generator with battery and PWM control - sophisticated but many losses through the system. |
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I'm envisioning skating in tar. |
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[bungston] I was thinking of a flexible rotary shaft in a non-rotating
conduit, with the flywheel also being encased, so you're protected
from the spinning parts, with the flywheel case flat against the front of
your stomach to down in front of the occupied property. I'll make a
picture. It could go at the back though. |
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[8th] using a pair of motor generators and a battery might make this a
lot more practical, despite the possibility of slippage. |
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If you had plenty of power available you could get up to speed and
then change virtual inertia (resistance to change in wheel speed) to
make walking and stability better, or offer more resistance to
reduction in wheel speed than increase, to make speeding up easy by
shuffling feet back and forth. |
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And even without so much power, replacing the shafts, flywheel and
gearbox could make it much easier to build. |
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