1 / 7

Three-Body Trajectory Model and Spiral Transfer Matching

March 5, 2009. Three-Body Trajectory Model and Spiral Transfer Matching. 1. Three-Body Gravity Model. Much more accurate than patched two body model Gravity effects of Earth and moon are always taken into account Important Result: We will not need a separate circularization scheme!!

bertha
Download Presentation

Three-Body Trajectory Model and Spiral Transfer Matching

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. March 5, 2009 [Andrew Damon] [Mission Ops] Three-Body Trajectory Model and Spiral Transfer Matching 1

  2. Three-Body Gravity Model • Much more accurate than patched two body model • Gravity effects of Earth and moon are always taken into account • Important Result: We will not need a separate circularization scheme!! • Time of flights will be on the order of 1 year to desired lunar orbit Spiral Out ~ 290 days Spiral In ~ 60 days [Andrew Damon] [Mission Ops] 2

  3. Approximate Data for Trajectory Match [Andrew Damon] [Mission Ops] All scenarios based on 400 km Earth parking orbit and 50 km lunar circular orbit Total TOF set to 350 days Sizing will be iterative procedure with propulsion group (Brad) Important to match masses at end of outbound spiral and beginning of inbound spiral ΔV to match up outbound and inbound spirals is not yet optimized 3

  4. Backup Slides 10 kg payload case [Andrew Damon] [Mission Ops] 4

  5. 100g case - Zoomed in to match point: [Andrew Damon] [Mission Ops] 5

  6. 10 kg case - Zoomed in to match point: [Andrew Damon] [Mission Ops] 6

  7. [Andrew Damon] [Mission Ops] A Big Thanks to: Dan Grebowand Marty Ozimek Their help with the orbit mechanics of the 3-body problem was invaluable. They spent several hours checking over our code and also lent us class notes from Prof. Howell’s AAE 632. 7

More Related