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<p>The NASA Space Robotics Challenge 2 was a swarm of robots
searching and mining materials. They were much sleeker than <a
moz-do-not-send="true"
href="https://www.nasa.gov/feature/ames/vipers-many-brains-are-better-than-one">Viper</a>.</p>
<p>My robots for the NASA Sample Return Robot Challenge were 6 Wheel
Wild Thumpers. (Some videos:
<a class="moz-txt-link-freetext" href="https://www.youtube.com/playlist?list=PLo9blbzvWvrG9_Mkug2W6FMsEww7IsKXv">https://www.youtube.com/playlist?list=PLo9blbzvWvrG9_Mkug2W6FMsEww7IsKXv</a>)
They were the smallest and least expensive rovers in that
competition. That is a nice chassis. One problem I encountered was
on some turns wheels would lose contact with the ground and just
spin. They were difficult to rotate in place because of high
traction. <br>
</p>
<div class="moz-signature"><font face="Comic Sans MS"
color="#000080"> <br>
-73 - <br>
<b>Rud Merriam K5RUD</b> <br>
<a href="http://mysticlakesoftware.com/"> <i>Mystic Lake
Software</i> </a> <br>
<br>
</font>
</div>
<div class="moz-cite-prefix">On 11/5/21 8:43 AM, Doug Paradis via
DPRGlist wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOdUW+bT0FVQ9Bj=N22EGe4aj-Q+DMoG_CYSpjH5BwKfUVncLg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Jeff,
<div> Here is another good article discussing "CADRE"'s
purpose (see: <a
href="https://www.nasa.gov/directorates/spacetech/game_changing_development/projects/CADRE"
moz-do-not-send="true">https://www.nasa.gov/directorates/spacetech/game_changing_development/projects/CADRE</a>).
I wish they showed their rover design a bit more. It looks to
have a lot of 3D printed parts in the prototype. Other
observations are that each wheel is driven by an individual
motor like Dagu Wild Thumper designs (see: <a
href="https://www.pololu.com/product/1564"
moz-do-not-send="true">https://www.pololu.com/product/1564</a>)
and the top of the final rover, not the test rover, is to be
covered with solar cells (see: <a
href="https://www.autoevolution.com/news/autonomous-rovers-being-tested-in-the-slope-nasa-to-3d-map-the-moon-with-them-173419.html#agal_4"
moz-do-not-send="true">https://www.autoevolution.com/news/autonomous-rovers-being-tested-in-the-slope-nasa-to-3d-map-the-moon-with-them-173419.html#agal_4</a>).
I wish we had a better view of the rover's suspension. That is
the design feature that really interests me currently.The
rover shown in the article doesn't appear to be a folding
robot A-PUFFER variation.</div>
<div><br>
</div>
<div> NASA seems to be really investigating the idea of
multiple small robots launched from the delivery vehicle after
landing (A-PUFFER and CADRE). </div>
<div><br>
</div>
<div>Regards,</div>
<div>Doug P.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Nov 4, 2021 at 8:09 PM
Jeff Koenig via DPRGlist <<a
href="mailto:dprglist@lists.dprg.org" moz-do-not-send="true">dprglist@lists.dprg.org</a>>
wrote:<br>
</div>
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0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div>I thought this was interesting. This is the first time
I've heard of NASA's "CADRE" project, and I'm hoping to
learn more about it.</div>
<div><br>
</div>
<div><a
href="https://www.jpl.nasa.gov/news/a-cadre-of-mini-rovers-navigate-the-lunar-terrain-of-slope"
target="_blank" moz-do-not-send="true">https://www.jpl.nasa.gov/news/a-cadre-of-mini-rovers-navigate-the-lunar-terrain-of-slope</a></div>
<div><br>
</div>
<div>Best Robo-Regards,</div>
<div>Jeff<br>
</div>
</div>
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