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  #16   Spotlight this post!  
Unread 22-01-2010, 11:47
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Re: Semi-Omni-Arcade Drive

Quote:
Originally Posted by Greg McKaskle View Post
If that is with the robot standing still, that sounds too high. I'd suggest repeating the test and make sure that the robot isn't moved while being calibrated, and make sure the modules are plugged in when the cRIO is turned on, and make sure that your wires aren't picking up noise from motors and such.

Greg McKaskle
The robot was on blocks, not moving (visibly), all 5 modules were plugged in, and the wire went from the crio away from the cims, turning at about .2-.4
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  #17   Spotlight this post!  
Unread 22-01-2010, 16:43
Adam.garcia Adam.garcia is offline
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Re: Semi-Omni-Arcade Drive

Yes, team 1388, Eagle Robotics used a gyro for their steering mechanism. I was so impressed as to how it worked. They had a bike tire, with pegs on each side to show the concept.
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Unread 22-01-2010, 18:06
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Jared Russell Jared Russell is offline
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Re: Semi-Omni-Arcade Drive

Quote:
Originally Posted by Adam.garcia View Post
Yes, team 1388, Eagle Robotics used a gyro for their steering mechanism. I was so impressed as to how it worked. They had a bike tire, with pegs on each side to show the concept.
This is an active gyroscope with a rotating mass. The original poster was referring to a MEMS sensing gyroscope.

But yes, Eagles Robotics' gyro system was very cool.
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Unread 23-01-2010, 15:56
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Re: Semi-Omni-Arcade Drive

Figured out our problem, we thought the gyro was using 0-1, so we were multiplying the results by 360. actual drift was only 0.01 degrees a second.
We also had driver testing, and decided to not use this drive system. They liked Twist joystick Arcade better
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  #20   Spotlight this post!  
Unread 23-01-2010, 23:07
buchanan buchanan is offline
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Re: Semi-Omni-Arcade Drive

In "real life" I do a lot of work in human-hardware interaction and measuring effectiveness of different ways of doing things. Without reading too much into it with respect to the particular merits of one control paradigm over another, consider some general thoughts:

What seems (or what they say is) easier or more intuitive to people isn't necessarily. When you want to evaluate the effectiveness of alternatives, measure their actual performance on tasks similar to the ones you care about. "Intuitive" often is used simply as a synonym for "familiar", and people with hard-won skills in a difficult task are prone to describing what they do as "easy".

Subjective evaluations like these are notoriously untrustworthy. If you want to find out what works best, measure how well things work. If you want to give people what they like, ask them what they like. Be careful about confusing the two.

Last edited by buchanan : 23-01-2010 at 23:09. Reason: typo
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Unread 24-01-2010, 08:21
Greg McKaskle Greg McKaskle is offline
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Re: Semi-Omni-Arcade Drive

Quote:
If you want to give people what they like, ask them what they like. Be careful about confusing the two.
And then give them feedback in the form of a side-by-side test, as blind as can be -- placebo effect doesn't only affect drug tests. Sometimes it takes a skill test and measured data to convince someone of their own performance numbers.

Greg McKaskle
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