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Electronic Frisbee Thrower

Electronic Frisbee Thrower. ECE345 Senior Design Fall 2002 Daniel Kang Keith Orlowski. Introduction. Proposed idea Design a project with personal interest Decided on a disc thrower Application Training tool Entertainment. Objective. Launch a disc approximately 50 yards

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Electronic Frisbee Thrower

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  1. Electronic Frisbee Thrower ECE345 Senior Design Fall 2002 Daniel Kang Keith Orlowski

  2. Introduction • Proposed idea • Design a project with personal interest • Decided on a disc thrower • Application • Training tool • Entertainment

  3. Objective • Launch a disc approximately 50 yards • Create spin of 10 rev/sec • Control direction • Pitch (Up-Down) • Yaw (Left-Right) • Roll (Tilt) • Portability

  4. Initial Ideas • Projection methods • Slingshot / crossbow • Catapult arm • Single belt • One degree of freedom • Dual belt with independent speed • Two degrees of freedom

  5. Original Design • Keypad user interface • Processor / logic • Display • Motor drivers • Output • Feedback loop • Orientation limit

  6. Motor Calculations • Results • Disc • vTMax = 22.4 m/s (~50 mph) • vRMax = 10 rev/sec • Belt • vMax = 30.9 m/s (~70 mph) • vMin = 0.46 m/s • Motor • RPMMAX = 9,835 rpm

  7. Construction • Frame Design • Develop CAD drawings • Materials • Motor Selection • RPM vs torque • Cost / availability

  8. Design Modifications • Motor choice • RPM/torque requirements not feasible • Economic constraints • Overall performance decreased

  9. Testing • Amplifier characteristics • Power rating • Signal quality • Linearity • DC quality • Current Draw • Max = 5 A

  10. Testing (cont.)

  11. Problems • Motors • Limited selection of motors in Part Shop • Insufficient torque or RPM • Price • Belts • Not enough friction between disc surface and belt • Too much friction between belt and frame

  12. Problems (cont.) • Amplification • Op-amp + Transistor • Non-linear I-V relationship • Audio amplifier • Overheating • Poor signal quality • Power amplifier • Cost • Overheating

  13. Improvements • Motors • Higher RPM • Amplification • Multiple power amplifiers • Better quality heatsinks • Belt • Higher friction coefficient • Increase surface area

  14. Successes • Basic functionality achieved • Proper functioning of user interface • Linear response of amplifier • Independent motor control

  15. Questions?

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