BlackBox Sat by hol43707

VIEWS: 18 PAGES: 26

									      BlackBox Sat

    Critical Design Review
Colorado State University-Pueblo
         April 2, 2004


                           Greg Barela
                           Jose Segovia
                           Enrique Cornejo
        Mission Description
 To obtain certain individual atmospheric
  characteristic data.
 Measure acceleration activity and the
  Earth’s magnetic force.
 Store and retrieve collected data.
Mission Goals and NASA Benefits

 Collect sample satellite direction activity
 Observe acceleration of the Earth’s
  atmosphere during entire flight and landing
 Route gathered data from microprocessor to
  micro-cassette recorder.
 NASA Benefit: Determining direction for
  output video and still shot evaluation.
     System Requirements
 Payload under 1.5kg
 On-board power supply
 Heating and ventilation subsystems
 External power engaging mechanisms
          System Overview
•Basic outline of system
          Subsystem Description
   We have nine subsystems which form our payload.
     –Sensors
     –Instrumentation amplifier
     – Relays
     – Signal converter
     –Micro-controller
     –Coding
     –Micro-cassette recorder
     –Shell
     –Heater Circuit
     Magnetic Field Sensor
 Honeywell
  (HMC1001)
 + - 3mv/V/gauss
 3-5Volt supply
 Bandwidth is over
  1MHz
 Analog output
          Accelerometer
 ±2 g Dual Axis
  Accelerometer
  Features
 1000 G shock
  survival
 3 V to 5.25 V
  Single supply
  operation
 Low Power < 0.6
  mA
 Duty Cycle Output
         Instrumentation Amp




Gain =
                  Relays
   Double Pole Double Throw
    – 11.1mA contact rating
    – 5v coil voltage

   Single Pole Single Throw
     – .20mA contact rating
     – 5V coil voltage
                A/D Converter

   ADC801LCN
    – 5V supply
    – 0V-5V input voltage
      range
    – 8-bit resolution
              PIC16F84
 18-Pin
 Enhanced
  Flash/EEPROM
 8-bit µ-controller
 68 bytes EEPROM
 1K x 14 Program
  Memory
             Objective of Coding
   Digital Output Accelerometer Sensor
    – Calibrate
    – Measure Tilt
    – Frequency Differentiation


   Linear Output Magnetic Field Sensor
    – A/D Conversion
    – Port Intializing
    – Delays
      Computer Programming
   PICSTART Plus

   MPLAB SIM

   MPASM Assembler
Flowchart           Start




                  Initialize




             Restore Calibration
                 Constants


                Check Accel



                Read Accel



            Find X-AXIS & Y-AXIS


            Record measurement
               on tape drive


                   Delay
           Sony M-560V
 Voice Operated
  Recording
 2AA battery supply
 90 minute tapes
 300Hz-4000hz
 113 grams
                  Shell
 House all seven subsystems
 Protects subsystems from the changing
  environment
 Helps cushion on landing
           Shell Hardware
 ¼’’ foam core forms the outer shell
 Aluminum tape for extra strength
 Glue to adhere the shell
                Heater Circuit

   (3) 9V batteries


   (2) 6 Ohm 5 watt wire
    wound resistors
           Payload Insulation
   Styrofoam
    – Help keep subsystems from freezing


    – Cushions the landing


    – Helps protect all sybsystems
         System Interfaces
•Complete System Overview
               Mass Budget

Micro-cassette recorder                       113g
Batteries (7) 9V, (2) AA                      364g
Shell (Insulation, Glue)                      200g
All Circuitry (Sensos, IC's, Relays, etc.)    110g
Heater Circuit                                 50g
TOTAL                                        837g
LIMIT                                        1.4kg
         Project Organization
 Greg Barela : purchase parts, create
  schematics, sensor prototyping, circuit
  integration
 Jose Segovia: sensor modules
  programming, sensor to micro-
  processor research and evaluation,
  output data conversion.
 Enrique Cornejo: Payload
  construction, Heater Circuit, insulation
  and ventilation.
                                   Budget
 Circuit Design             Item Needed                 Quantity           Price
                               Greg
                     Accelorometer(ADX202JQC)              1              $19.25
                    A/D Converter (ADC801LCN)                             $25.85
                   Magnetic Field Sensor(HMC1001)          2              $33.16
                        Solderable Ck t. Board             1              $15.00
                       PIC Chip ( PIC16F84A)               1               $5.63
                      Voltage Regulator(78L05)            1 IC          CSU supplied
                             Circuit Wire                 2ft.          CSU supplied
                            Relay(DPDT)                    1               $5.84
                             Relay(SPST)                   1               $1.53
                         Microcassette Tapes               2               $4.99
                       Microcassette Recorder              1           Sears Donation
                      Resistors, Caps, and Misc.       as needed        CSU supplied
Programming                    Jose
                      PIC Start Plus Programmer            1            CSU supplied
                        18 DIP Pack age Case               1            CSU supplied
  Satellite Box               Henry
                           Aluminum Tape                   30 ft.       CSU supplied
                             Foam Core                    4' x 8'         $10.52
                            Batteries (9V)                   6          CSU supplied
                        Braided Dacron Line               2.4mm        EOSS Supplied
                       Anti-Abrasion Bushings         3.6-5.5mm x 2        $4.00
                            Box Materials            20" x 30"inches      $+--4.99
                             Heater Kit                      1          CSU supplied
Finished Project                                    Estimated Total = $133.76 $133.76
                               Schedule
             Ta sk                  Du ra tio n   Sta rt    F in ish   Pe rso n re sp o n sib le
         Finalize Design                15        10-Mar    28-Mar                  -
Power                                              14-Mar    31-Mar               Jose
Mass and power budgets                             14-Mar    31-Mar              Greg
Presentation of PDR                      1          1-Apr     1-Apr                 -
                    CDR                  0         2-Apr     2-Apr                  -
shell                                    2         22-Mar    26-Mar             Enrique
insulation                               2         23-Mar    27-Mar             Enrique
conect power                             2         29-Apr     1-May                 -
          subsystems complete            0         22-Mar    26-Mar                 -
        subsystems final testing         5         5-Apr     16-Apr                 -
  subsystems enviromental testing        5         5-Apr     9-Apr                  -
Drop test                                1         6-Apr     10-Apr              Team
Freeze test                              1         7-Apr     11-Apr           Jose & Greg
Vacum test                               1         8-Apr     12-Apr                 -
                integration             30        12-May    20-Jun                  -
           system env. Testing           5         5-Apr     16-Apr                 -
Drop test                                1         5-Apr     16-Apr              Team
Freeze test                              1         5-Apr     16-Apr           Jose & Greg
Vacum test                               1         5-Apr     16-Apr                 -
           Prepare for Launch            2        16-Apr     17-Apr                 -
                  Launch                 0         2-Aug     2-Aug                  -
Thanks you for your time.
Are there any questions or
       suggestions?

								
To top