1 / 34

CubeSat Deorbit Device Final Report

MAE 435 Fall 2013. CubeSat Deorbit Device Final Report. 435 Team Members. Sahil Dhali Christopher Quarles Michael Foch Brockton Baskette Kyle Wade Cian Branco Advisor: Dr. Robert Ash, P.E. Introduction. Space debris are a serious hazard to continued Space exploration

curt
Download Presentation

CubeSat Deorbit Device Final Report

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. MAE 435 Fall 2013 CubeSat Deorbit DeviceFinal Report

  2. 435 Team Members SahilDhali Christopher Quarles Michael Foch Brockton BasketteKyle Wade Cian Branco Advisor: Dr. Robert Ash, P.E.

  3. Introduction • Space debris are a serious hazard to continued Space exploration • Dead CubeSats are hard to track • De-Orbit Device Project aimed at Prototype for 1U CubeSats

  4. Overview • De-orbit Device Project is multidepartment effort between the Mechanical and Electrical Engineering Departments • MAE 435 Group’s goal to build the prototype

  5. Team Gantt Chart

  6. Benzoic Acid • Sublimation at room temperature

  7. Inflation Requirements • Sounding Rocket Altitude: 160kms. • Pressure for sublimation@160kms: 1.42*10-6 • Temperature for sublimation@160kms: -41’C

  8. Large Vacuum Chamber

  9. Difficulties • Unknown leak in large vacuum chamber • Extensive man hours spent troubleshooting and brainstorming solutions • Ultimately had to resort to using small vacuum chamber

  10. Small Vacuum Chamber

  11. Small Chamber Cont. • The small chamber reaches minimum pressure around 3 minutes

  12. Preliminary Heating Element • Design required to fit inside small chamber at minimal cost • Prototype: Steel wire wound around itself in the shape of a Fermat’s Spiral. • Operates on 4 AA batteries.

  13. Preliminary Heating Element Cont. • The element can achieve temperatures between 60’C to 85’C • The spiral grill was designed to create a flat surface area with as much contact with the plate holding the benzoic acid.

  14. Pros/Cons • Materials readily available • Inexpensive • Easy to modify design • Difficult to control heat output • Power runs out quickly • Requires Direct Contact

  15. New Heating Element: E-Cigarette • Default temperature:65-80 ‘C • Potentially can go up to 180’C with appropriate voltage. • Made of 4 major parts: • The LED light cover • The lithium battery • The Atomizer (heating element) • The mouth piece

  16. Our E-Cig Heating Element • Fig 1 shows the mouth of the piece where the airbrake would be attached with the epoxy. • Fig 2 shows the top view of the heating element. The benzoic acid crystal would be secured on the screen over the heating coil. • Fig 3 shows the battery pack we used to perform the experiment. It attches to the bottom of the element and powers to heat the coil visible in fig.2. Fig 1 Fig 3 Fig 2

  17. Pros/Cons of Using E-Cig Atomiser • Extremely light weight; usually Al alloy;….. Weight Constraint: Check • Safe and easy to use and store;….. Storing and lasting Constraint: Check • Power efficient; Works on a 3.1V – 6.7V to achieve max heating capabilities;….. Power Constraint: Check • Size is significantly smaller than previous design, but needs to be more compact….. Space Constraint: Not Check • Bowl on which acid to be secured cannot hold all the acid required for complete deployment….. Container Volume Constraint: Not Check

  18. Conclusion: Heating Element • Meets our temperature requirements, which was our main concern. • The on board lithium battery should be enough to power our heater. • This device is powered by a button which has to be manually pressed • Now all that is needed for the heating element is a bigger bowl to store the complete amount of the acid, securing it in the mylar.

  19. Final Steps • Design remote activation for heating element • Fit all the parts together for one final test before launch.

  20. ODU Satellite Ground Station • Operates mission specific transceivers, antennas, transmission lines, amplifiers and digital signal processing. • Intended to communicate with orbiting weather satellites and amateur radios to obtain earth images and current prevailing weather conditions. • Designed to receive data from NOAA weather satellites. • OUR PURPOSE: Use the SGS to keep constant communication with our CubeSat to obtain its position coordinates and signal to deploy the airbrake on command.

  21. Balloon Airbrake • Material - Aluminized Mylar for its strength and reflectivity. (DuPont Films) • Target Cross-sectional area – 1 m2 • The inflation medium will be benzoic acid.

  22. Constraints • Benzoic Acid Pressure • Pmin > 0.1813 Pa (greater than environment @ 90 km) • Partial Pressure of Air • Ambient air in balloon is to be removed to prevent premature inflation • Benzoic Acid Placement • Must absorb enough heat from heating element to reach sublimation

  23. Mylar Inflatable Status • New material from (Coated Product Sales) was ideal for sealing. • Rectangular Cross-Section (Pillow shape) was used. • Cross-sectional area may need to be reduced due to chamber volume.

  24. Benzoic Acid Storage • Benzoic acid stored in a washer with a screen. • Epoxied (cold welded) to inflatable. • Located on the inner surface of balloon.

  25. Inflatable Prep • Vacuum Seal-Off Fitting – OerlikonLeybold product • Predesigned to seal off during vacuuming, solid heat conduction, low weight and small profile • Vacuum seal-off fitting was press-fit into the bottom of chamber • Balloon will be epoxy sealed to the fitting

  26. Inflatable Prep • During removal of ambient air, the material was sucked into the valve exhaust creating a seal. • Did not allow for all ambient air to be evacuated. • Solutions included folding the balloon before pumping, a pump with a throttle and/or collapsible stent.

  27. Balloon Chamber • Provides a pressurized zone to house the balloon. • Contains a valve mounted in the bottom surface. • Current prototype does not account for camera mounting

  28. Chamber Testing • Single layer of Kapton failed. • Punctured by sharp corners of chamber cap

  29. Chamber Testing Cont.

  30. More Testing • 5 mil Mylar holds pressure with 2 gaskets • There are multiple points of deformation in membrane

  31. Remaining Challenges • Mounting doors on pins • Locking mechanism to keep the doors closed

  32. Conclusion • Prototype in current state reduces chance for waste • Overall Goal to pass working prototype to current 434 students at end of the semester has been met • Hand-off to occur next week

  33. Questions? Questions? Comments? Concerns?Thank you!

More Related