Antenna Mechanical & Structural Engineering (333H) BWG-2 Feed Platform. Jet Propulsion Laboratory California Institute of Technology.

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1 1 In The Beginning

2 This was the image That started it all.. That ignited my engines That took me to the stars.. All from a flyer, hanging on my Professors door, 3 years ago 2

3 This image continues to shine.. 3 Getting brighter and brighter And is a testament to the power of our Nation s educational programs and leadership Viva the pursuit of reaching for the stars..

4 4 Solid-Modeling and Structural Analysis for BWG Type-2 Antenna Feed-Platform Report by Andrew Crawford Jet Propulsion Laboratory/Montana Space Grant Consortium Summer Internship 2011

5 DSN Background Jet Propulsion Laboratory 5 NASA s DSN (Deep Space Network) NASA s DSN (Deep Space Network) International network that supports interplanetary spacecraft and space science DSN consists of three deep-space communications facilities Placed strategically 120 degrees apart around the Earth Tracking locations include Goldstone, California; Madrid, Spain, and Canberra, Australia DSN is the largest and most sensitive scientific telecommunications system in the world Currently tracking such missions as Opportunity rover on Mars, the Dawn spacecraft in the asteroid belt, and the Voyager missions among others

6 Project Objectives 6 Primary Target Objectives 1. Identify Necessary Requirements Gather and research all mandated requirements from interfacing stakeholders and equipment Produce requirements document with all interfacing stakeholders to establish proper communicaion 2. Conceptual Solid-Model and Design Use SolidWorks modeling software to design and layout platform in pedestal Apply requirements obtained previously 3. Stress-Analysis and Deflection Tests Use FEMAP and NASTRAN stress/deflection analysis programs to check safety and functionality requirements 4. Peer-Review and Status Briefing Establish comprehensive design status briefing Allow input and critique from stakeholders

7 Approach/Strategies Used to Achieve Objectives 7 1. Gathered Requirements All interfacing stakeholders were interviewed for their specific requirements that involved platform construction Fundamental communication in advance was vital in requirement procurement Proper fact gathering and observing requirements reduces future revisions and expensive retro-fitting Functional Requirements Document was written and at the time of this report is awaiting final release from document control International building codes and regulations were incorporated Examples of gathered requirements included Electronic layout RF (radio frequency) tolerances Structural live load (human) and working loads Feed cone tolerances to maintain signal stability Seismic Facilities (heating/cooling) Mechanical engineering Deep Space Network Equipment

8 Approach/Strategies Used to Achieve Objectives 8 2. Conceptual Design/Modeling SolidWorks 3D solid modeling was used from the beginning stages Components interfacing with the platform had to be modeled and incorporated, or imported and if a solid model already existed Careful attention was paid to previously gathered build requirements and parameters Column placement took precedent from early stages Separate stand-alone trough or miniplatform was isolated from main platform ensuring minimal deflection Equipment footprints and keep-out zones observed Configuration management, such as creating one part to work with multiple configurations was a primary driver in part/assembly design Simplistic design and ease of manufacturing taken into account

9 Approach/Strategies Used to Achieve Objectives 9 2. Conceptual Design/Modeling (cont..) Detailed bill of materials created for future drawings Organized part/assembly numerical system used for JPL/PDMS part call-outs and future installments Country-specific material availability researched

10 Approach/Strategies Used to Achieve Objectives 3. Stress and Deflection Analysis Analysis helped determine structural capability and tolerance data of trough Critical driving-requirement involved strict movement and vibration tolerances of LNA feed cone and mounting Isolated trough mini-platform was analyzed separate from main platform FEMAP (Finite Element Modeling and Post- Processing) analysis software was used in conjunction with NASTRAN code solver Subjected to critical stress-analysis movement and deflection load-case scenarios Needed to be at or above the factor of safety values and below the maximum deflection allowance Example of LC1 z-direction deflection, maintaining allowable tolerance with a Pass from Pass/Fail criteria Gravity 1G Load Case Displacement at focal point: Tz: 3.78E-2inch Allowable:.040 inch Status: Pass 10

11 Approach/Strategies Used to Achieve Objectives Peer Review/Status Briefing Jimmy Hendrix: Purple Haze? Primary objective is concurrence of current design/model with all interfacing stakeholders Provides opportunity for input/critique in order to move forward with design plans and eventual released drawings Outcome of peer review provides valuable input related to minor changes and modifications if necessary Pending positive feedback, platform will be ready for next phase in design process, drawing creation

12 Project Results/Platform Status 4 of the 4 main target objectives were met and satisfied Positive and constructive outcome from peer review fulfilled driving requirements Main platform on-target for build scheduled timelines 12

13 Internship and Project Discussion/Acknowledgements 13 Internship/Project Discussion JPL/Montana Space Grant internship far exceeded expected and desired personal and educational results Offered not only real-world and practical engineering experience and applications, but went above and beyond in the level of personal involvement and instruction from mentors and the parties involved Dynamic environment and accessible resources such as library and laboratory usage provided excellent learning platform Project was formulated and designed encompassing entire spectrum of project formulation to completion Media and public outreach generated and promoted by JPL and MSGC were a tremendous success in showcasing what Montana and the nation is capable of. Acknowledgements JPL Mentor Jason Carlton went above and beyond in excellent guidance, instruction, and hands on learning His attention to detail mind-frame and passion in engineering fundamentals provided immeasurable inspiration and long-term guidance Strived to involve and provide as many positive learning lessons as possible Group Supervisor Neil Bucknam displayed exceptional management and supervision, providing invaluable insight and advice for long-term engineering and business goals MSGC made all of this possible, was exceptional and un-matched in their support, and truly provides dreams and opportunities for Montana students to excel The rest of 333H and other 333 members for their countless support and guidance

14 Internship Extra JPL/NASA Blog titled Earth to Intern 14 Thanks to approval and cooperation of JPL s education department, the Deep Space Networks Antenna Mechanical group, and the MSGC, educational blog was possible Blog provided educational platform to share internship experiences and benefits with the masses Allowed across the board inter-departmental educational and engineering experiences within JPL and NASA, gaining invaluable positive experience Blog can be found at:

15 See you next summer! 15

16 16 Supposed to be my Destiny

17 The Old Office.. Jet Propulsion Laboratory 17

18 18

19 19 NCAS Rover Design Contest as JSC. Astronaut Andrew Feuestel Speaking with Us about the Importance of Continued Education, 2 weeks before his Launch. Working on Curiosity 1 Week before Departure to KSC

20 20 HRBE in Orbit!!

21 21 Yesterday at the DC Subway Station

22 Little Green Men The Call! 22

23 23 The second call..leland..