Subject:
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Re: Classroom experiments gone awry
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Thu, 26 Apr 2007 21:11:03 GMT
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Viewed:
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18187 times
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In lugnet.robotics.nxt, Edwin Pilobello wrote:
> Starting at a fixed point and heading, each team
> marked where the dominant wheel stopped after 10
> rotations for each "tick" on the steering slider
> of the Move Block.
What do you mean by "dominant" here? And what is a "tick" on the steering slider
equal to? I've done something similar to figure out the behavior with respect to
the position of the steering slider, but this is a *great* place to introduce
the idea of wires (where exact values can be wired in).
> I've conducted my own experiments for most of the night.
> I recorded the readings off the Move block for the inside
> motor and averaged 9 sets of results.
>
> 0. 100.0% Straight
> 1. 97.7%
> 2. 93.5%
> 3. 89.5%
> 4. 86.2%
> 5. 82.9%
> 6. 78.8%
> 7. 69.3%
> 8. 58.1%
> 9. 15.8% Had a small negative value to start with
> 10.-102.9% Spin in place
What do you mean by percentages here? By "readings recorded off the Move block"
I would think you mean the degree readings in the feedback pane of the
configuration panel... but those are pure numbers. Are you saying the inside
wheel odometry reading is some percentage of the outer wheel odometry reading?
> Vindication!
Or, perhaps something else was going on with the students trials. For instance,
are all of their data explainable by repeating readings? This is another test
they could do, I'd think. For that matter, they could try to combine their
datasets to get better results and identify outliers better.
--
Brian Davis
>
> I dd not get any of the aberrant readings the kids got. So, I've concluded that
> they inadvertently repeated some settings and missed others.
>
> Vindication!
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Message has 1 Reply:
 | | Re: Classroom experiments gone awry
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| (...) I'm using terms of my own making. These are terms that seem to work with 10 - 12 year olds. By "dominant" I mean the wheel which measures the duration specified in a turn. Sometimes I use the term "outside wheel". For example, a duration of (...) (18 years ago, 28-Apr-07, to lugnet.robotics.nxt)
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Message is in Reply To:
| | Classroom experiments gone awry
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| Imagine a classroom with eight 13-year old boys, paired up with a laptop and the standard NXT Edu robot. The 9x9 inch floor tiles made perfect for a little experiment in derivation. Starting at a fixed point and heading, each team marked where the (...) (18 years ago, 26-Apr-07, to lugnet.robotics.nxt)
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