Opportunity Route Map |
Opportunity Route Map |
Feb 11 2005, 08:11 AM
Post
#1
|
|
The Insider Group: Members Posts: 669 Joined: 3-May 04 Member No.: 73 |
|
|
|
Apr 19 2018, 05:05 PM
Post
#2
|
||
Solar System Cartographer Group: Members Posts: 10166 Joined: 5-April 05 From: Canada Member No.: 227 |
Sol 5060, Opportunity moves a meter on Mars so I have to update my map. Time for some improvements to the base map.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
|
|
||
Apr 19 2018, 06:26 PM
Post
#3
|
||
Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
Sol 5060, Opportunity moves a meter on Mars so I have to update my map. Time for some improvements to the base map. Phil I'm assuming the Oppy outline is to scale, um, how does the rover execute the 180' turns? Does it do some form N-point turn, or can it do a tank-style "piviot in place" manouver, I ask because I don't recall ever seeing a circular pivot track. |
|
|
||
Apr 20 2018, 11:56 AM
Post
#4
|
|
Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
I'm assuming the Oppy outline is to scale, um, how does the rover execute the 180' turns? Does it do some form N-point turn, or can it do a tank-style "piviot in place" manouver, I ask because I don't recall ever seeing a circular pivot track. The MER and MSL rovers are designed to do a point turn, that is, pivoting around the vehicle center (assuming flat terrain, no slip). This is done by setting the corner wheels toed in at about 60 deg and rotating the left wheels in the opposite direction relative to the right side wheels. We can also do (small) tank turns when we need to point the vehicle with extreme accuracy (better than 1 deg) to avoid the small vehicle motion when we straighten the wheels. Alas Oppy now has TWO steering actuators that are inoperable so while we can still command a point turn, this results in a semi-tank-steer which we sometimes do but creates a lot of stress to the vehicle shaking it pretty violently. What we are left is what we call a spirograph turn, basically the 13-point turn you see being done by large SUVs in a small parking lot. This is even more difficult when you are on a 20 deg slope. Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
|
|
|
Lo-Fi Version | Time is now: 23rd May 2024 - 01:57 AM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |