Individual Subsystem Testing Report

1. Individual Subsystem Testing Report Zero Tilt Frostburg State University Kaetie Combs, Francisco Diaz , Sean Hughes, Jared Hughes, Andrew Huntley, Subhasis Ghosh, Mayowa Ogundipe, Derek Val-Addo, Michael Stevenson, Shaun O’Donnell, Ian Cuddahee, Michael Young, David Wall February 13 2012

2. Mission Overview • Mission Statement: Zero Tilt’s goal is to provide, for the first time, a stable environment throughout the flight of a Sounding Rocket via two concurrent objectives: • Tilt correction system • Despun platform system whs.mil

3. Mission Objectives • We plan to: • Counteract the platform spin • Orient the platform parallel to the earth’s surface at all times • We expect to prove that it is possible to correct spin, tilt, and determine the altitude based upon a level reference. • This could benefit any scientific experiment that requires stabilization

4. Mission Objectives: Theory and Concepts • The underlying theory and concepts: • negative feedback control systems • concepts of torque and centripetal force • Micro electromechanical systems (MEMS) • Real-Time Systems Theory (for multi-tasking

5. Mission Overview: Mission Requirements • Mission Objectives: • Counter the spin of the rocket during flight. • Keep a level surface to earth using our conceptual design. • Prove successful by using the stored gyroscope output and the feedback from various motors. • Minimum success criteria • Our main goals as the Zero Tilt team is to receive results indicating that we achieved zero tilt for the flight of a sounding rocket.

6. Functional Block Diagrams Zero Tilt System Tilt System Power System Despun System shoponline2011.com

7. Power Subsystem (Despun) Power Supply: 9 volt Lithiums 24 Volt Total Flash Memory Voltage Regulator 5 to 3 volts Voltage Regulator 24 to 5 Volts De-spin Motor Atmega 32 Processor High G Accelerometer High G Accelerometer

8. Power Subsystem (Tilt) Power Supply: 9 volt Lithiums 24 Volt Total Flash Memory Voltage Regulator 24 to 3 volts Gyroscope Voltage Regulator 24 to 6 volts Voltage Regulator 24 to 5 volts Atmega 32 Processor Spin Motor Tilt Motor Low G Accelerometer

9. Despun System High G Accelerometer Flash Memory Atmega 32 Processor High G Accelerometer Motorcontroller/Driver Despun Motor

10. Tilt System Spin Motor Flash Memory Atmega 32 Processor Tilt Motor Low-G Accelerometer Gyroscope

11. Changes from CDR • Decided to consider a new servo motor that has lower power requirements, a faster response time, and more torque. • We are running power wires from slip ring directly onto board due to our decision to limit our turn radius on the tilt platform. • Due to Servo Considerations some minor design changes are being made for placement on Tilt platform.

12. Program Management and Team Updates Pictured from left to right: Mayowa Ogundipe, Subhasis Ghosh, Jared Hughes, Ian Cuddahee, Sean Hughes Derek Val-Addo, Andrew Huntley, Kaetie Combs, Michael Stevenson, Francisco Diaz, Michael Young, Dr. Mohammed Eltayeb, Shaun O’Donnell, David Wall

13. Schedule Update • We are on schedule electrically and are waiting on the fabrication of mechanical parts to finish testing. • We have shifted the completion of the mechanical tests later because of machining time. • We are focusing our efforts on completing the electrical elements so that we know they will be reliable on the mechanical layout. • Our main concern is completing our mechanical fabrication so we can finish testing.

14. Subsystem Overview • Subsystems • Electrical • Discussion by MayowaOgundipe, and Derek Val-Addo • Power • Discussion by Andrew Huntley, Jared Hughes, and Sean Hughes • Mechanical • Discussion by Shaun O’Donnell, and David Wall nisd.net

15. Electrical Subsystem Update • Status • What is complete/what has been tested? • What has not yet been checked out?

16. Electrical Subsystem Update (Continued)

17. Electrical Subsystem Update • What were the results? • We were able to collect gyroscope and accelerometer data. (dps for gyroscope, and voltage for the accelerometer) • We were able to convert dps to degrees for the Gyroscope and voltage to g’s for the accelerometer. • We were able to program the servo motor to react to changes in degree measure read from the gyroscope, either positive or negative. lochnessproject.org

18. Power Subsystem Update • Status • What is complete/what has been tested? • What has not yet been checked out?

19. Power Subsystem Update

20. Mechanical Subsystem Update • Status • What is complete/what has been tested? • What has not yet been checked out?

21. Mechanical Subsystem Update • Discussion of current mechanical objectives including machining • schedule, tilt platform construction, and slip ring mounting

22. Plan for Subsystem Integration

23. Lessons Learned • Subsystem testing requires rigid time restraints and an understanding of the time required to complete tasks. Taking into account setbacks and off-ramps. Designing a system would benefit also from an understand as to how it will be constructed. Engineering tasks are best approached by assigning specific tasks and deadlines to groups so that any dependencies can be accounted for. • If we started this project over we would ensure more carefully that the pieces selected could perform their designated tasks. We would also assign more ambitious deadlines and complete dependent items in a more time efficient manner. • So far, by designating tasks we have been able to work ahead in certain areas and share discoveries with the entire team. We have class discussions and demonstrations that function as learning tools for all of us. http://sparetimeuniversity.com/?page_id=153

24. Conclusions In conclusion we hope to get up to speed with our mechanical subsystem. We intend to continue work with the electrical system and iron out Flash memory requirements and PCB board layouts so they will be ready for the Systems Integration Testing. We need to more extensively test power and ensure that our new selected batteries can supply the current and voltage needed.