Individual subsystem testing report
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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.

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Individual Subsystem Testing Report

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Individual subsystem testing report

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


Mission overview

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


Mission objectives

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


Mission objectives theory and concepts

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


Mission overview mission requirements

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.


Functional block diagrams

Functional Block Diagrams

Zero Tilt System

Tilt System

Power System

Despun System

shoponline2011.com


Power subsystem despun

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


Power subsystem tilt

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


Despun system

Despun System

High G

Accelerometer

Flash Memory

Atmega 32

Processor

High G

Accelerometer

Motorcontroller/Driver

Despun Motor


Tilt system

Tilt System

Spin Motor

Flash Memory

Atmega 32

Processor

Tilt Motor

Low-G

Accelerometer

Gyroscope


Changes from cdr

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.


Program management and team updates

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


Schedule update

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.


Subsystem overview

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


Electrical subsystem update

Electrical Subsystem Update

  • Status

    • What is complete/what has been tested?

    • What has not yet been checked out?


Electrical subsystem update continued

Electrical Subsystem Update (Continued)


Electrical subsystem update1

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


Power subsystem update

Power Subsystem Update

  • Status

    • What is complete/what has been tested?

    • What has not yet been checked out?


Power subsystem update1

Power Subsystem Update


Mechanical subsystem update

Mechanical Subsystem Update

  • Status

    • What is complete/what has been tested?

    • What has not yet been checked out?


Mechanical subsystem update1

Mechanical Subsystem Update

  • Discussion of current mechanical objectives including machining

  • schedule, tilt platform construction, and slip ring mounting


Plan for subsystem integration

Plan for Subsystem Integration


Lessons learned

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


Conclusions

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.


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