Magnetic Bearing Critical Design Review Team miniMuffin Lauren Glogiewicz Jacob Beckner Kevin Bodkin James Holley Philip Terry

Level 0 Functional Decomposition Phil T.

Level 1 Functional Decomposition Phil T.

Level 2 Functional Decomposition Phil T.

Current Control Jake B. I out = -V in / R mag

Electromagnets Electromagnets have inductance as circuit element Causes initial overshoot and slow rise to desired level Must be accounted for in design Rise Time = 20 ns Leveling Time = 2.7 μs Jake B.

Sensor Circuit Sensor output current is based upon the distance away from the object Ideal distance to axle from the sensor is between 0.3” - 0.8” Beyond this, sensor data will become unreliable Kevin B.

A/D Converter Using microcontroller on-board A/D TI MSP430: 4 Channel 10-Bit 200 KSPS TI C2000: 7 Channel 12-Bit 4.6 MSPS Kevin B.

Software FD Kevin B bits per magnet sent to current control via FPGA I/O Convert distance error to current 8x sensor distance in to FPGA

Microprocessor / FPGA Two possible microcontroller / FPGA controllers: TI C2000 o Up to 60 MHz o Supports I2C and SPI o On board A/D Converters Altera DE2 Board o Up to 50 MHz o 80 GIO Pins o Ability to apply control in parallel James H.

D/A Converter TI DAC7576 o 8 channel, 12 bits o Up to 2.3 MHz communication speed o I 2 C synchronous communication will be used James H.

Magnet Test Bed James H.

Magnet Test Bed James H.

Timeline Milestone 1 o Floating 1D concept o Focus on feedback loop design and interface Milestone 2 o 2D axle built and working Expo o Fully 3D axle with horizontal stabilization Lauren G.

Updated Budget We have received $1000 from UROP We will still apply for the EEF Grant ItemPart No.CostQuantityTotal Cost ElectromagnetsEM 200 $ $ Optical SensorsSharp GP2Y0D805Z0F $ $ BJT $ $ 9.50 Op Amps $ $ Capacitors $ $ Resistors $ $ WireWire T Lead Plastic 22AG $ $ Nuts, Bolts, ScrewsAluminum (25 pack) $ $ Aluminum6ft x 1/4" x 2" $ Machining $ PCB $ $ Shipping and Handling $ $ Posters/Presentation $ Total $ 1, Lauren G.

Questions?