space grant symposium presentation
DESCRIPTION
Space Grant Symposium Presentation. Saturday – April 19 th , 2008 Joseph Farrell – U of A. Background Information. Junior in Aerospace Engineering at University of Arizona Location of internship – Raytheon Missile Systems Project Title – “Robotic Lander Design and Development” - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/1.jpg)
Saturday – April 19th, 2008
Joseph Farrell – U of A
![Page 2: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/2.jpg)
Junior in Aerospace Engineering at University of Arizona
Location of internship – Raytheon Missile Systems
Project Title – “Robotic Lander Design and Development”
Mentor – Jim Head (with assistance from Raytheon Engineers, and UA Faculty/Students)
Joseph Farrell
![Page 3: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/3.jpg)
Analysis of a Lunar Surface Return (LSR) report and excel spreadsheet (‘06-’07 Space Grant Report). Review of the Boomerang Report (NASA).
Analysis of Lander thruster configurations. Other Tasks:• Organization and summarization of the Goddard
Space Flight Center Program Listing.• Basic Matlab proficiency.• Preliminary Honeycomb Analysis (See Chris
Rogers’ presentation).
Joseph Farrell
![Page 4: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/4.jpg)
Joseph Farrell
Image taken from the Boomerang Report
Focus of Analysis
![Page 5: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/5.jpg)
LSR Report details a round-trip mission to the moon to collect a payload of moon material and bring it back to Earth.
“Boomerang” Report details a functionally similar mission.
Tasked with making the spreadsheet “close” ◦ Enough Net Delta V available for both the
ascent and landing stages◦ Positive lift margin for the launch stage
Goal was to optimize the spreadsheet to function with the parameters of the “Boomerang” Report.
Joseph Farrell
![Page 6: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/6.jpg)
Analysis parameters:- Fixed Launch Vehicle- Landing Stage • Between 1-4 pairs of fuel
tanks• Variable SRM Engine (Star #
ATK Motor)
- Lunar Ascent Stage (LAV)• 2 Stage Launch
Stage 1 – Variable SRM Engine (Star # ATK Motor)
Stage 2 – Variable SRM Engine (Star # ATK Motor)
Joseph Farrell
![Page 7: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/7.jpg)
Ultimately concluded that spreadsheet can not ‘close’.
“Boomerang” assumptions include the Lunar Lander providing delta V for landing and ascent.
LSR Report / Spreadsheet lacks this assumption.
Joseph Farrell
![Page 8: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/8.jpg)
Presented with four potential thruster configurations for landing a Planetary Lander with a vertical delta V=250m/s:Configuration 1: 4 Divert Thrusters, 8 ACS
Thrusters on deck.Configuration 2: 4 Divert Thrusters, 6 ACS
Thrusters on poles.Configuration 3: 2 Lateral and 2 Downward
Divert Thrusters , 8 ACS Thrusters on deck.Configuration 4: 2 Lateral and 2 Downward
Divert Thrusters, 6 ACS Thrusters on poles.
Joseph Farrell
![Page 9: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/9.jpg)
Joseph Farrell
![Page 10: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/10.jpg)
Task was to judge/analyze different configurations based on (only a few listed):
- Braking Time - Fuel usage - Correction time for 10ms
Divert misfire
- Ability to compensate for C.G. drift
- Misfires about the X, Y, and Z axes
- More…
Joseph Farrell
VerticalHorizontal
Error bars compensate for C.G. Drift
![Page 11: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/11.jpg)
Configuration 3 chosen to be optimum configuration – 2 Down, 2 Lateral Divert Thrusters, 8 ACS Thrusters on deck.
Joseph Farrell
![Page 12: Space Grant Symposium Presentation](https://reader035.vdocuments.us/reader035/viewer/2022062723/56813cd8550346895da67d80/html5/thumbnails/12.jpg)
Overall, my experience at Raytheon has been a very positive one.
Gained valuable insight into team-work and solitary analysis.
Better understanding of the practical work that goes with the title of an “engineer”.
Thanks!!
Joseph Farrell