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MatthewGrim / Lunar_SPS

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Generate results for larger scale targets #41

Closed MatthewGrim closed 5 years ago

MatthewGrim commented 6 years ago

This issue documents the target analysis for a lunar lander and ISRU mission demonstrator using the SPS design tool.

MatthewGrim commented 5 years ago

First Pass

Equatorial

equatorial_demonstrator_results equatorial_excavator_results

North Pole

northpole_demonstrator_results northpole_excavator_results

MatthewGrim commented 5 years ago

Comments

Looking at the excavator results, the entire domain is accessible. This is because the design is effectively designed to survive the lunar night on its own. This implies the battery size could potentially be reduced. At the same time, the excavator now needs a solar array which may not be practical.

The demonstrator cannot access high altitude orbits. This is because we have constrained the beam to be larger than the receiver area. If this changes so the beam can be smaller, as well, it may be possible to access the higher altitude space.

MatthewGrim commented 5 years ago

To-do

  1. Change analysis to take into account the possibility that the receiver area is larger than the transmitted beam.
  2. Check that the rovers can survive over the whole lunar night.

With these two changes we will be up to speed with the higher power targets to where we are with Sorato and AMALIA. This is still just looking at one satellite. With more satellites, we can consider whether the excavator can be continuously powered. This may go beyond what we need for the CDF study.

MatthewGrim commented 5 years ago

Results from ISRU demonstrator and excavator survival

equatorial_demonstrator equatorial_excavator northpole_demonstrator northpole_excavator

MatthewGrim commented 5 years ago

So the designs as they stand can survive the lunar night for almost the entire domain. This is with the assumptions that I have currently. Changing the efficiency or the hibernation requirements may change this result.

MatthewGrim commented 5 years ago

Range results for higher power targets

figure_1

MatthewGrim commented 5 years ago

Coming back to this issue, it seems like I have done most of what I aimed to do, and there is no need to further develop the loose ends.