1 / 33

Design Review

This project outlines the design evolution and final design of a window positioning system for a tank-launched infrared guided warhead. It includes analysis, project schedule, and funding details.

dlong
Télécharger la présentation

Design Review

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. Raytheon Seekers Design Review Raytheon Seekers

  2. Raytheon Seekers Aaron Scrignar…..Team Leader Eric Draves……Historian Trevor Moody……Web Page Des., Mediator Stacy Davison……Document Coord., Financial Officer LaTanya Williams……Communicator Raytheon Seekers

  3. Outline • Client Description • Problem Definition • Project Needs • Design Philosophy • Design Method • Design Evolution • Final Design • Analysis • Remaining Project Schedule • Spring 2003 • Project Funding • Time Log • Conclusion Raytheon Seekers

  4. More about… Raytheon • Specializes in defense systems, government and commercial electronics, business aviation and special mission aircraft • Chairman & CEO: Daniel P. Burnham • $16.9 billion revenue in 2001 • 79,000 employees worldwide • Headquarters located in Lexington, MA Raytheon Seekers

  5. Client Contact • Brian Scott • Electronic Systems • B.S.E. from NAU in Mechanical Engineering • Masters Degree at U of A • Worked at Raytheon for seven years • Tucson, Arizona Raytheon Seekers

  6. Problem Statement • Preliminary design and proof-of-principal prototype needed for a window positioning system to be used in a tank-launched infrared guided warhead Raytheon Seekers

  7. Seeker Device Layout Raytheon Seekers

  8. Project Needs • Survive 10KG launch • Packaged in 0.2” thick by 2.9” diameter cylinder, excluding electronics • Move a Germanium lens .04” thick by .6” diameter to cover a photocell array • Lens must stay in position for 1 second, and move in and out of the field in less than 1 second Raytheon Seekers

  9. Raytheon Seekers

  10. Shock Response Spectra • Launch Conditions • Set Back: 10,000G • Balloting: 3,300G • Set Forward: 2,000G • Flight Conditions • Lateral: 0-3G • Vibration: 5G

  11. Scope of Design Constraints • One penny subject to 10,000 G’s weighs approximately 59 lbs. • The restricted thickness of the work area is about the thickness of 3 ½ quarters Raytheon Seekers

  12. Design Philosophy • K.I.S.S. • Minimize number of parts to reduce probability of failure • Keep close contact with client • Brings attention to potential design problems before it’s too late Raytheon Seekers

  13. Design Method • Brainstorming- Mechanism ideas • Mechanism Selection- Based on size constraints • Modeling- Cardboard model to assess geometries • Analysis- Hand calculations, Adams, Cosmos • Finalize Design- Select dimensions, Tolerance fitting • Fabrication- Large scale model and actual prototype Raytheon Seekers

  14. Design Evolution • Design One • Two solenoids • Sliding rails • Return spring • Design Problems • Large actuation distance • Unnecessary parts • Space limitation Raytheon Seekers

  15. Design Evolution • Design Two • Solenoid • Arm • Pin close to edge • Spring return • Design Problems • Arm deflection • Pivot position accentuates balloting forces • Requires a latching mechanism Raytheon Seekers

  16. Selected Design • Design Three • Solenoid • Arm • Mid-arm pin position • Spring return • Deflection supports • Counterweight Raytheon Seekers

  17. Component Selection • Solenoid – PO-6 3Volt • Arm – 7075 T6 Aluminum • Pin – Stainless Steel with bronze bushing • Frame –Ti-6A1-4V HT-46 Raytheon Seekers

  18. Selected Solenoid • Meets necessary criteria: - Dimensions - Actuation Length - Forces - Power Requirements Raytheon Seekers

  19. Full Arm Swept Angle: 53 Degrees Selected Solenoid (cont.) Raytheon Seekers

  20. Arm Design Raytheon Seekers

  21. PIN ARM BUSHING FRAMEPLATE Pin Connection Design Raytheon Seekers

  22. Frame Design Raytheon Seekers

  23. Modeling • Made actual size cardboard and CAD models to assess the fit of components Raytheon Seekers

  24. Analysis Justification • Deformation of surfaces are within tolerances defined by the optical engineer • Deformation of support structure for optical and antenna elements is within tolerance and creates no interference • No ultimate failures occur and probability of failure is less than 0.01% Raytheon Seekers

  25. Analysis • Hand Calculations • Arm deflection • Arm material failure for normal forces • Arm material failure for balloting forces • Pin material failure for balloting forces • Required swept angle of arm Raytheon Seekers

  26. Full Arm Swept Angle: 53 Degrees Analysis (cont.) Adams – Arm actuation time Raytheon Seekers

  27. Future Tasks • Component FEA analysis • Pin press fit calculations • Order materials • Fabrication Raytheon Seekers

  28. Remaining Project Plan Spring 2003 • Status Report #3 March 27 • Prototype Complete April 12 • Test in Rail Gun April 15 • Design Presentation April 22 • Capstone Conference April 25 • Finalize Web Page and Report May 2 Raytheon Seekers

  29. Project Funding • Raytheon provided $3,000 for project costs • Prototype $1900 • Travel Expenses $500 • Documentation Material $500 • Modeling $100 Raytheon Seekers

  30. Purchases to Date • 8 SP-25 solenoids (two 3-volt, four 6-volt, two 12-volt) – testing, prototype • 8 PO-25-6 (two 3-volt, four 6-volt, two 12-volt) – testing, prototype • Cork – modeling • Cutting supplies – modeling • Birch plywood – modeling • Balsa wood - modeling Raytheon Seekers

  31. Time Log • Aaron Scrignar 71.95 • Eric Draves 71.00 • Trevor Moody 43.25 • Stacy Snyder 32.55 • LaTanya Williams 39.75 _________________________ Total Hours: 258.5 hrs Raytheon Seekers

  32. Conclusion • The balanced swing arm design is simple and efficient in providing the required lens motion while withstanding the environmental constraints • Prototype fabrication will be complete by April 12, 2003 for Rail Gun test Raytheon Seekers

  33. Questions? Raytheon Seekers

More Related