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Team 6: Defender

Stephen Wolf Kirk Iler Brian Bentz Fuhe Xu. Team 6: Defender. Updated PSSCs. 1. An ability to fire a projectile using magnetic force 2. An ability to aim the projectile by controlling of the azimuth and elevation angles of the barrel

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Team 6: Defender

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  1. Stephen Wolf Kirk Iler Brian Bentz FuheXu Team 6:Defender

  2. Updated PSSCs • 1. An ability to fire a projectile using magnetic force • 2. An ability to aim the projectile by controlling of the azimuth and elevation angles of the barrel • 3. An ability to charge a capacitor bank to a variable voltage, up to 400V • 4. An ability to gather images and perform target recognition and tracking • 5. An ability for a user to enter commands and display the status of the turret through an external interface Team 6: Defender

  3. Block Diagram Team 6: Defender

  4. Constraint Considerations • High voltage, current requirements for coilgun; safety considerations • Various communication protocols • Computation on Atom board • Cost, Availability, Samples? Team 6: Defender

  5. “Free” Parts • Donated, custom built, or used with professor permission • Atom board: onboard computation • Cameras: Canon VC-C50i with PTZ • Capacitors: 3900μF, 400V max electrolytics(x4). U32L • Coilgun Barrel Team 6: Defender

  6. Master Microcontroller • 8 bit vs 16 bit • Freescalevs PIC vs Atmel • Needs I2C, USB, maybe others • Easy to program • 3.3V vs 5V • C programming capability • Memory / RAM / MIPS (not as important) • In circuit debugging Team 6: Defender

  7. Master Microcontroller • PIC18F65J50 • 8 bit, 32KB flash/4KB RAM, 12 MIPS, 3.3V, 64TQFP • 5 Timers, 2 USART, 2 MSSP, 1 USB, 2PWM, 8 DAC, 7 GPIO • PIC24FJ64GB002 • 16bit, 64KB flash/8k RAM, 16MIPS, 3.3V, 44 QFN/SOIC • 5 Timers, 2 MSSP, 2 UART, 1 USB OTG, 5 PWM, 15 remappable pins • MC9S08JM60 • 8 bit, 60KB flash/4KB RAM, 12 MIPS, 5V, 44-64QFN/QFP • 3 Timers, 1 MSSP, 2 SCI, 1 USB, 2 PWM Team 6: Defender

  8. Coilgun Firing Control • Voltage • Amperage • Heat dissipation, Failure Modes • Price!! • IGBT vs SCR - Control Team 6: Defender

  9. Insulated Gate Bi-Polar Transistor(IGBT) • APT200GN60JDQ4 • 600V, 283/600A , 640W, .25°C/W $42.60 (no sink) • APTGT300SK60D3G • 600V, 400/600A, 940W, .16°C/W, $155.32 (w/sink) • SEMIX 453GAL12E4S • 1200V, 685/1350A, .11°C/W, 215.48 (w/ sink) • STGE200NB60S • 600V, 200/400A, 600W, .21°C/W , 35.28 (no sink) Team 6: Defender

  10. Stepper Motors • Unipolarvs Bipolar, Stacks • Holding Torque • Steps per rotation • Operating voltage Team 6: Defender

  11. Stepper Motor Controllers • Dual motor controller • High current output • Internal PWM generation vs external driving • Interface • Ability to microstep Team 6: Defender

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