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Subject: 
RE: Gyroscopes That Don't Spin Make It Easy to Hover
Newsgroups: 
lugnet.robotics
Date: 
Wed, 21 Aug 2002 12:58:44 GMT
Original-From: 
Rob Limbaugh <RLIMBAUGH@GREENFIELDGROUP.COMstopspam>
Viewed: 
570 times
  
Tilt

-----Original Message-----
From: John Barnes [mailto:barnes@sensors.com]
Sent: Wednesday, August 21, 2002 8:55 AM
To: lego-robotics@crynwr.com
Subject: Re: Gyroscopes That Don't Spin Make It Easy to Hover


In lugnet.robotics, Marco Correia writes:

Has anyone built a custom sensor based on these ?
...probably too expensive for simple LEGO bots, no ?

Not yet ;)

The Murata part looks worth wrapping in a brick though!

The big question, in my mind, is what would you want a single axis rate gyro
for in a Lego robot for?

It certainly won't help with navigation if mounted in such a way as to pick
up horizontal rotation because these devices are notorious for serious
drift. You'll even note that the application information shows a high pass
filter removing the "DC" component from the sensor's output. If you want to
know what direction you're heading in, the better choice is a compass. So
what else are they useful for?

JB



Message has 2 Replies:
  Re: Gyroscopes That Don't Spin Make It Easy to Hover
 
Ergh, it's a lot cheaper to use an accelerometer (measuring "g") for that and they inherently make absolute readings, so there's no drift. JB (...) (22 years ago, 21-Aug-02, to lugnet.robotics)
  Re: Gyroscopes That Don't Spin Make It Easy to Hover
 
Hi, (...) Our bluewand ((URL) uses the murata parts. Analog devices has some gyros, too. (...) The same as in a heli: Prevent from rotation. You can e.g. make your robot drive a straight line on a thick carpet. Or you can make it return to the (...) (22 years ago, 21-Aug-02, to lugnet.robotics)

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