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Senior Design Team 12 Timothy O’Hara (MEM) Amanda Annesi (MEM) Jason Gomes (ECE) Louis Bocchicchio (ECE)

Three-Dimensional Control of De-spun Flying Munitions Vehicles. Senior Design Team 12 Timothy O’Hara (MEM) Amanda Annesi (MEM) Jason Gomes (ECE) Louis Bocchicchio (ECE). Team Advisors B. C. Chang (MEM) P. Nagvajava (ECE) H. Kwatny (MEM). Team Sponsor David Hepner (ARL).

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Senior Design Team 12 Timothy O’Hara (MEM) Amanda Annesi (MEM) Jason Gomes (ECE) Louis Bocchicchio (ECE)

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  1. Three-Dimensional Control of De-spun Flying Munitions Vehicles Senior Design Team 12 Timothy O’Hara (MEM) Amanda Annesi (MEM) Jason Gomes (ECE) Louis Bocchicchio (ECE) Team Advisors B. C. Chang (MEM) P. Nagvajava (ECE) H. Kwatny (MEM) Team Sponsor David Hepner (ARL)

  2. Project Organization Chart Amanda Annesi Project Manager Mechanical Group Electrical Group Timothy O’Hara (MEM) Senior Mechanical Engineer Jason Gomes (ECE) Senior Electrical Engineer Louis Bocchicchio (ECE) Senior Computer Engineer Amanda Annesi (MEM) Senior Mechanical Engineer

  3. Presentation Outline • Background • Problem Statement • Existing Technologies • Previous accomplishments • Proposed Work • Project Conceptualization • Design Approach • Methods of Solution • Deliverables • Management • Economic Analysis • Gantt Chart • Project Summary

  4. Problem Statement • Current projectiles are lacking advanced precision guidance systems • Partially de-spin a projectile in 3-dimensional space • Position control of projectile in 3-dimensional space

  5. Project Background • Conventional Munitions are Less Effective at Longer Ranges • Most Artillery Rounds Wasted – No lethal Effect • Opportunity for Efficiency Improvement is Enormous • Reduced Collateral Damage • Accelerated Enemy Defeat

  6. Causes of Inaccuracy • Natural elements acting on the projectile in flight • Defects during manufacturing • Worn gun tubes from which they are fired • Meteorological data • Propellant temperature • Variable initial velocities

  7. Existing Technologies • Types of Technology • Canards Actuator System (CAS) • Air Brake System • Drawbacks • Reduced range • Lack of maneuverability and accuracy • Expensive • Large • Current Application • ANSR • ERGM • Excalibur

  8. Previous Senior Design Accomplishments Back Half Motor DSP Board Front Half Motor Support

  9. Recommended Improvements • PID control is not sufficient for high frequencies • Explore multiple manufacturing techniques (i.e. machining, wood working, rapid prototyping) • Filter out accelerometer, ADC noise • Develop and test magnetometer code • Develop a controller that can handle 20 Hz (different control techniques) • 24V motor control board • Plan for certain tasks taking longer then initially estimated • Model the system more accurately

  10. Design Approach • Two separate Control systems • Control of partial de-spun • Collect test data • Build controller • Guidance control • Canards • Thrusters • Valve system

  11. Constraints & Challenges • High-G and temperature qualified parts • Responsive • Precise • Fits current infrastructure • Attractive cost / performance ratio • Survivable • Low Cost

  12. Methods of Solution • Design and build front-end of projectile to interface with the ARL supplied gyro/gimbal test unit • System Identification and State space representation • Determine optimal pole placement to obtain desired transient response • PID Experimental Implementation • Design Build, Test, Simulate • Control Projectile • Roll • Yaw • Pitch

  13. CAD Drawing of Model

  14. Gyroscope with Gimbal

  15. Electrical components Figure D-1: DSP Microprocessor circuit chip Figure D-3: Magnetometer circuit chip Figure D-4: JTAG Emulator Figure D-2: Accelerometer circuit chip

  16. Testing and Experimentation • Mount final prototype on gyro/gimbal for performance evaluation • Test plan • Spin Projectile without control • Activate controller and collect data • Observe projectile reaction to outside interference • Adjust gyro/gimbal motor speeds • Evaluate partially de-spun projectile performance results • Test Criteria • Position Control • Response Time • Overshoot • Stability

  17. Deliverables • Working Prototype • Capable of de-spin and position control • Final Report • Dynamics Model • Simulation • Demonstration • Mechanical drawings • Circuitry Schematic

  18. Economic Analysis

  19. Timetable: September - January

  20. Timetable: January - May

  21. Project Summary • Fully functional partially de-spun projectile that can be controlled in a 3 degree system. • Components that contribute to the projectile • Testing to ensure it meets requirements and expectations

  22. Thank You • The members of Senior Design Team 13 would like to give special thanks to : • Dr. B.C. Chang • Dr. Harry Kwatny • Dr. Prawat Nagvajara • Mr. David Hepner • Army Research Laboratory • Drexel University

  23. Questions??

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