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Published byGeorgina Grant Modified over 9 years ago
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FLIGHT READINESS REVIEW TEAM HAWAII
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LEO HANO FULL SCALE LOW POWER March 13, 2011 Motor = K780R
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LEO HANO FULL SCALE LOW POWER March 20, 2001 Motor = K1000W
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OVERVIEW
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Drogue 42in 83.59 ft/sec Main 144in 22.45 ft/sec PARACHUTES
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Main Charge Drogue Charge DUAL DEPLOYMENT AVIONICS TEST
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65.2 ft/sec Reach safe speed at 66.34 inches RAIL EXIT VELOCITY
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HULA-HOOP2 PLANNED FEATURES 2 memory options Model A: 256 Kbytes – built on multiple circuit boards to be flown on the Leo Hano rocket Model B: 128 Kbytes – built on one circuit board to be flown on an Executioner rocket One version of the program code for all units Variable sample rates – between 1 to 6 samples per second
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HULA-HOOP2 SUBSYSTEMS Controller Main serial interface Debug port serial interface Field Input and Output Data storage Sensors & Analog to Digital Convertors (ADC) Temperature Acceleration Magnetic field 12 bit ADC Power
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BLOCK DIAGRAM – V3
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CONTROLLER Parallax Basic Stamp 2p features: 24 pin DIP 8 code and/or data segments at 2 Kbytes per segment 16 digital Input/Output interfaces Debug and program upload interface Voltage regulator at +5 Volts DATA STORAGE Micro Technology 24LC512- I/P EEPROM features: 8 pin DIP capacity of 65,536 bytes or 64 Kbytes per chip I 2 C interface Memory sizes Model A: 4 chips for 256 Kbytes Model B: 2 chips for 128 Kbytes
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SENSORS TEMPERATURE: National Semiconductor LM34 features: 3 pin TO-92 case Analog Output Connected to ADC#2 ACCELERATION: Parallax’s Freescale MMA7455 Accelerometer features: wider than usual 8 pin DIP SPI or I 2 C interface – using SPI 3 axis acceleration choices of 2g, 4g or 8 g – using 8g 8 bit or 10 bit resolution – using 8 bit Digital Output Data stream 8 bits in 8 bits out
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SENSORS: MAGNETIC FIELD Custom built inductors Analog Output 3 coils will be used, one for each axis (X, Y and Z) Each coil will have its own 4 resistor network that will be connected to ADC#1
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ANALOG TO DIGITAL CONVERTORS: 12 BIT ADC #1 Micro Technology MCP3208 features 16 pin DIP 12 bit resolution 8 single ended input channels SPI interface Adjustable voltage reference (.25 to 5 volts) while keeping the device’s power supply at 5 volts. Will be set at 1 volt Data stream 6 bits in 12 bits out ANALOG TO DIGITAL CONVERTORS: 12 BIT ADC #2 Micro Technology MCP3202 features 8 pin DIP 12 bit resolution 2 single ended input channels SPI interface Data stream 4 bits in 12 bits out
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MAHALO
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