Rover - Revision history

Michel Lamontagne: /* Wheels */

2025-04-14T20:54:25Z

Wheels

Michel Lamontagne: /* Wheels */

2025-04-14T20:52:23Z

Wheels

Michel Lamontagne: /* Wheels */

2025-04-14T20:51:57Z

Wheels

Michel Lamontagne: /* Wheels */

2025-04-14T20:51:45Z

Wheels

Michel Lamontagne: /* Wheels */

2025-04-14T20:50:55Z

Wheels

Michel Lamontagne: /* Wheels */

2025-04-14T20:50:07Z

Wheels

Michel Lamontagne: /* Wheels */

2025-04-14T20:47:47Z

Wheels

Michel Lamontagne: /* Wheels */

2025-04-14T20:46:03Z

Wheels

Michel Lamontagne: /* Air pressure */

2024-09-24T12:57:00Z

Air pressure

Michel Lamontagne: /* Life support */

2024-09-23T14:19:50Z

Life support

@@ Line 55: / Line 55: @@
 ===Wheels===
-Wheels and suspensions are a significant challenge for a Mars rover.
+Wheels and suspensions are a significant challenge for a Mars rover:
 *The extreme cold of Martian nights and winters can reach the glass transition phase of most flexible materials.  This makes the wheel materials brittle and destroys them.
 *The swings in temperature can also cause damage to many materials, and any material used would have to function correctly in the wide range of temperatures experienced.
 Possible solutions are:
 *To reduce temperature swings, rovers could be stored at night in structures with infrared heating.
 *Solid metallic wheels, as for the Curiosity Rover, can solve many of the above mentionned problems, but might perform poorly at higher speeds.
 *Wire wheels were used successfully by the Apollo Moon Rover, and have recently been re-developed by NASA<ref>https://www.nasa.gov/specials/wheels/</ref>.
-*Radiation can cause organic molecules such as carbon based materials (plastics for instance) to deform and become very different and inconsistent materials.
+*Regular replacement of the wheels, or storage of the rovers in radiation shielded environments.
 *Additives that change the properties of materials have been explored as a possibility to conserve the advantages of flexible structures.<ref>https://meridian.allenpress.com/tst/article/52/3/225/493096/Tires-for-Mars-Rovers-Reinforcing-BR-and-BR-Vinyl</ref>

@@ Line 58: / Line 58: @@
 *The extreme cold of Martian nights and winters can reach the glass transition phase of most flexible materials.  This makes the wheel materials brittle and destroys them.
 *The swings in temperature can also cause damage to many materials, and any material used would have to function correctly in the wide range of temperatures experienced.
-**To reduce temperature swings, rovers could be stored at night in structures with infrared heating.
+Possible solutions are:
 *Solid metallic wheels, as for the Curiosity Rover, can solve many of the above mentionned problems, but might perform poorly at higher speeds.
 *Wire wheels were used successfully by the Apollo Moon Rover, and have recently been re-developed by NASA<ref>https://www.nasa.gov/specials/wheels/</ref>.

@@ Line 59: / Line 59: @@
 *The swings in temperature can also cause damage to many materials, and any material used would have to function correctly in the wide range of temperatures experienced.
 **To reduce temperature swings, rovers could be stored at night in structures with infrared heating.
-*Solid metallic wheels, as for the Curiosity Rover can solve many of the above mentionned problems, but might perform poorly at higher speeds.
+*Solid metallic wheels, as for the Curiosity Rover, can solve many of the above mentionned problems, but might perform poorly at higher speeds.
 *Wire wheels were used successfully by the Apollo Moon Rover, and have recently been re-developed by NASA<ref>https://www.nasa.gov/specials/wheels/</ref>.
 *Radiation can cause organic molecules such as carbon based materials (plastics for instance) to deform and become very different and inconsistent materials.

@@ Line 59: / Line 59: @@
 *The swings in temperature can also cause damage to many materials, and any material used would have to function correctly in the wide range of temperatures experienced.
 **To reduce temperature swings, rovers could be stored at night in structures with infrared heating.
-*Solid metallic wheels, as for the Curiosity Rover.
+*Solid metallic wheels, as for the Curiosity Rover can solve many of the above mentionned problems, but might perform poorly at higher speeds.
 *Wire wheels were used successfully by the Apollo Moon Rover, and have recently been re-developed by NASA<ref>https://www.nasa.gov/specials/wheels/</ref>.
 *Radiation can cause organic molecules such as carbon based materials (plastics for instance) to deform and become very different and inconsistent materials.

@@ Line 57: / Line 57: @@
 Wheels and suspensions are a significant challenge for a Mars rover.
 *The extreme cold of Martian nights and winters can reach the glass transition phase of most flexible materials.  This makes the wheel materials brittle and destroys them.
-*The swings in temperature can also cause damage to many materials, and any material used would have to function correctly in the wide range of temperatures experienced. A possible solution is solid metallic wheels, as for the Curiosity Rover.
+*The swings in temperature can also cause damage to many materials, and any material used would have to function correctly in the wide range of temperatures experienced.
 *Wire wheels were used successfully by the Apollo Moon Rover, and have recently been re-developed by NASA<ref>https://www.nasa.gov/specials/wheels/</ref>.
 *Radiation can cause organic molecules such as carbon based materials (plastics for instance) to deform and become very different and inconsistent materials.
 *These issues could mean regular replacing of wheels, or storage of rovers in radiation shielded environments.
 *Additives that change the properties of materials have been explored as a possibility to conserve the advantages of flexible structures.<ref>https://meridian.allenpress.com/tst/article/52/3/225/493096/Tires-for-Mars-Rovers-Reinforcing-BR-and-BR-Vinyl</ref>

@@ Line 57: / Line 57: @@
 Wheels and suspensions are a significant challenge for a Mars rover.  The extreme cold of Martian nights and winters can reach the glass transition phase of most flexible materials.  This makes the wheel materials brittle and destroys them. The swings in temperature can also cause damage to many materials, and any material used would have to function correctly in the wide range of temperatures experienced. A possible solution is solid metallic wheels, as for the Curiosity Rover.
 Alternatively, wire wheels were used successfully by the Apollo Moon Rover, and have recently been re-developed by NASA<ref>https://www.nasa.gov/specials/wheels/</ref>. Another note is that radiation can cause organic molecules such as carbon based materials (plastics for instance) to deform and become very different and inconsistent materials. These issues could mean regular replacing of wheels, or storage of rovers in radiation shielded environments.
-Additives that change the properties of materials have been explored as a possibility to conserve the advantages of flexible structures.()
+Additives that change the properties of materials have been explored as a possibility to conserve the advantages of flexible structures.<ref>https://meridian.allenpress.com/tst/article/52/3/225/493096/Tires-for-Mars-Rovers-Reinforcing-BR-and-BR-Vinyl</ref>
 ==References==

@@ Line 35: / Line 35: @@
 ===Air pressure===
-The choice  of air pressure used in the rover depends on a number of operational constraints.  If the rover includes pressure suits that are used frequently, then there may be an advantage in using the pressure suits operating pressure as the rover's pressure, to avoid the requirement of a long adaptation period for the astronauts to enter the suits.  If the rovers do not have suits, then they may operate at whatever the atmospheric pressure of the martian base is maintained at.
+The choice  of air pressure used in the rover depends on a number of operational constraints.  If the rover includes pressure suits that are used frequently, then there may be an advantage in using the pressure suit's operating pressure as the rover's pressure, to avoid the requirement of a long adaptation period for the astronauts to enter the suits.  If the rovers do not have suits, then they may operate at whatever the atmospheric pressure of the Martian base is maintained at.  With the possibility for the recent Artemis suits of operation at 8.2 psi, this may favor operating at the pressure suit's pressure.
 ===Radiation protection===

← Older revision		Revision as of 14:19, 23 September 2024
Line 33:		Line 33:

	Note that storage for life support items such as food and water will have to be provisioned inside the rover in case of emergency and to enable longer mission duration. Food often has a more strict requirement on storage.		Note that storage for life support items such as food and water will have to be provisioned inside the rover in case of emergency and to enable longer mission duration. Food often has a more strict requirement on storage.
		+
		+	===Air pressure===
		+	The choice of air pressure used in the rover depends on a number of operational constraints. If the rover includes pressure suits that are used frequently, then there may be an advantage in using the pressure suits operating pressure as the rover's pressure, to avoid the requirement of a long adaptation period for the astronauts to enter the suits. If the rovers do not have suits, then they may operate at whatever the atmospheric pressure of the martian base is maintained at.

	===Radiation protection===		===Radiation protection===