Post Cook Islands Bedrock and Soil Science Studies, The 3rd leg in our Journey to Endeavour Crater |
  |
Post Cook Islands Bedrock and Soil Science Studies, The 3rd leg in our Journey to Endeavour Crater |
 May 3 2009, 01:51 AM
Post
#106
|
|
|
Member  Group: Members Posts: 202 Joined: 9-September 08 Member No.: 4334  |
How will this new problem affect the overall mission? Will it drop our chances of getting to Endeavour?
|
 |
 
|
|
May 3 2009, 06:00 AM
Post
#107
|
|
 Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
QUOTE (Vultur @ May 2 2009, 06:51 PM)  How will this new problem affect the overall mission? Will it drop our chances of getting to Endeavour? Don't know yet. There is some challenging terrain ahead still. If we lose the RF wheel when we are on the parking lot type of terrain maybe we can still drive her to Endeavor. We got some experience in driving with a stuck wheel. :-( 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.
|
|
|
|
| Guest_Sunspot_* |
May 3 2009, 07:31 AM
Post
#108
|
|
Guests |
QUOTE (Vultur @ May 3 2009, 02:51 AM) How will this new problem affect the overall mission? Will it drop our chances of getting to Endeavour? Isn't their another "Endurance" type crater on the route to Endeavour? Maybe that would be a more realistic target. |
|
|
|
|
May 3 2009, 10:48 AM
Post
#109
|
|
 Senior Member Group: Members Posts: 2921 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
QUOTE (Oersted @ May 3 2009, 02:23 AM) Non so se tifi per qualche squadra, ma io stavo a San Siro stasera, e mi sembra che Inter sta per vincere il campeonato... Forza el AC Milano 
-------------------- |
|
|
|
|
May 3 2009, 01:30 PM
Post
#110
|
|
 Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
Just observing casually, it seems like every time the RF current acts up, it's after a period of driving laterally across drifts. Could be my imagination.
|
|
|
|
|
May 3 2009, 06:16 PM
Post
#111
|
|
 Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
That would make sense, Mike; the drive wheels are probably spinning a bit during dune traverses.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
|
|
|
|
|
May 3 2009, 08:38 PM
Post
#112
|
|
|
Senior Member Group: Members Posts: 2921 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
QUOTE (Sunspot @ May 3 2009, 09:31 AM) Isn't their another "Endurance" type crater on the route to Endeavour? Maybe that would be a more realistic target. Administrators: is there any mean to hide this post to Ustrax's view?  
-------------------- |
|
|
|
|
May 3 2009, 11:29 PM
Post
#113
|
|
|
Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
QUOTE (nprev @ May 3 2009, 11:16 AM) That would make sense, Mike; the drive wheels are probably spinning a bit during dune traverses. Hmmm, I remember seeing higher RF wheel currents in VC anulus, and never thought to correlate the wheel currents with ripple crossings. It seems that whenever the RF current is high it is high for entire drives, not particularly during ripple crossings. But one thing that is related to ripple crossing is heading. Since we drive more or less at the same time of day, the Sun will heat one side more than the other. I will try to investigate this. Thanks! 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.
|
|
|
|
|
May 4 2009, 10:21 AM
Post
#114
|
|
|
Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
QUOTE (RoverDriver @ May 4 2009, 01:29 AM) Since we drive more or less at the same time of day, the Sun will heat one side more than the other. which would also be consistent with the observed correlation wrt. to forward/backwards-driving... |
|
|
|
|
May 4 2009, 10:56 AM
Post
#115
|
|
|
Senior Member Group: Members Posts: 2921 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
IIRC, Spirit RF went off right after a full steering. Any correlation with end of drive manoeuver?
-------------------- |
|
|
|
|
May 4 2009, 11:00 AM
Post
#116
|
|
 Member Group: Members Posts: 578 Joined: 5-November 04 From: Denmark Member No.: 107 |
Opportunitys RF wheel no longer has any steering.
Maybe parking at the end of the drive so that the morning sun heats the RF wheel? Of course this could conflict whith communication passes etc... -------------------- "I want to make as many people as possible feel like they are part of this adventure. We are going to give everybody a sense of what exploring the surface of another world is really like"
- Steven Squyres |
|
|
|
|
May 4 2009, 01:23 PM
Post
#117
|
|
|
Solar System Cartographer Group: Members Posts: 10171 Joined: 5-April 05 From: Canada Member No.: 227 |
Can a single wheel be disabled during driving? A sort of voluntary Spiritism (or should that be Spiritosis?) - the idea being to drive on five wheels maybe three drives out of four, allowing Opportunity to make some progress while still resting the bad wheel. Then driving on all six on one drive out of four to make up some extra distance. Those drives could include a direction reversal.
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) |
|
|
|
|
May 4 2009, 03:35 PM
Post
#118
|
|
 Senior Member Group: Moderator Posts: 2262 Joined: 9-February 04 From: Melbourne - Oz Member No.: 16 |
Yes, in fact Spirit did that a lot when high motor currents first showed up on her back in the first winter.
-------------------- |
|
|
|
|
May 4 2009, 03:45 PM
Post
#119
|
|
|
Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
Yup - the Thanksgiving Pan (sol 300ish?) shows the interrupted drag tracks from doing just that.
|
|
|
|
|
May 4 2009, 04:55 PM
Post
#120
|
|
 Senior Member Group: Members Posts: 4247 Joined: 17-January 05 Member No.: 152 |
QUOTE (Phil Stooke @ May 4 2009, 02:23 PM) Can a single wheel be disabled during driving? Like a lot of good questions, this one's been asked before. Check out Paolo's response here. To me it seems this would be a really tough call. How do you quantify the advantages of driving faster now, versus extending the life of the wheel to allow greater maneuverability later? Actually, it may be moot at the moment, since negotiating even the current moderate ripples may be a big problem with five wheels. But then I suppose that would be simple enough to test with a short experimental drive using 5 wheels. Perhaps voluntary 5-wheel driving will become a good option once we get to the flat parking lot terrain. |
|
|
|
|
|
Lo-Fi Version | Time is now: 29th May 2024 - 12:19 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. |
|
