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Unread 25-01-2003, 05:35
FotoPlasma FotoPlasma is offline
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Quote:
Originally posted by Lloyd Burns
The big problem with the gyro, if it is used for dead reckoning, is that it goes non-linear at turn rates less than 90 degrees/second. This is the turn rate of your forearm as you raise it from horizontal to vertical over a whole second ("one steamboat"). If your robot turns only that fast, it will appear quite sedate. If it turns faster, your robot can't tell where it is heading.
It's actually worse than that.

The GyroChip which we got in the kit, for a few seasons, until 2003, actually had a maximum detectable rate of 64deg/sec, after which it's maxed out. This year's GyroChip is only marginally better at 75deg/sec.

Basically, if you're planning on having a quick drivetrain, and using it to its full potential, you're not going to be able to use the GyroChip to dictate your rate of turn, without some tweaking.

references:
http://www.systron.com/prodinfo/AQRSSpc.html
http://www.systron.com/GyroChip%20Theory.pdf (page 5)
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Last edited by FotoPlasma : 25-01-2003 at 05:38.
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