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Flight Readiness Review

Flight Readiness Review. Team Hawaii. Leo Hano Full Scale Low Power . March 13, 2011 Motor = K780R. Leo Hano Full Scale Low Power. March 20, 2011 Motor = K1000T. Overview. Parachutes. Drogue 42in 83.59 ft /sec Main 144in 22.45 ft /sec. Dual Deployment Avionics test.

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Flight Readiness Review

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  1. Flight Readiness Review Team Hawaii

  2. Leo HanoFull Scale Low Power March 13, 2011 Motor = K780R

  3. Leo HanoFull Scale Low Power March 20, 2011 Motor = K1000T

  4. Overview

  5. Parachutes • Drogue • 42in • 83.59 ft/sec • Main • 144in • 22.45 ft/sec

  6. Dual Deployment Avionics test • Main Charge • Primary: 5.5 g • Back up: 5.5 g • Drogue Charge • Primary: 4 g • Back up: 4 g

  7. rail Exit Velocity • 65.2 ft/sec • Reach safe speed at 66.34 inches

  8. FSLP First attempt 3/13/11 • Possible causes: • E-matches pulled through • Improper packing of the main chute • Insufficient time to deploy main chute • Rocket was stable throughout flight • Drogue was deployed at apogee • Main event • No main deployment • Unsuccessful

  9. Fslp second attempt 3/20/11 • Rocket stable throughout flight even with the wind gusting between 12-19mph • Deployed drogue at apogee 12.5 sec after lift off • Main deployed shortly after • Drifted out to sea • Water recovery • Damaged avionics • Loss of data

  10. Payload – Hula-hoop 2 - Block Diagram

  11. Hula-hoop2 Subsystems • Controller • Main serial interface • Debug port serial interface • LEDs and switch • Data storage • Sensors & Analog to Digital Convertors (ADC) • Temperature • Acceleration • Magnetic field • 12 bit ADC • Power

  12. Controller Data Storage Micro Technology 24LC512 EEPROM features: 8 pin DIP capacity of 65,536 bytes or 64 Kbytes per chip I2C interface Memory sizes Model A: 4 chips for 256 Kbytes Model B: 2 chips for 128 Kbytes • 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

  13. Sensors Temperature: Acceleration: Parallax’s Freescale MMA7455 Accelerometer features: wider than usual 8 pin DIP SPI or I2C 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 • National Semiconductor LM34 features: • 3 pin TO-92 case • Analog Output • Connected to ADC#2

  14. 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

  15. Analog to digital convertors: 12 bit ADC #1 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 • 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

  16. Mahalo Questions?

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