Skip to content

Latest commit

 

History

History
99 lines (89 loc) · 2.61 KB

SensorList.md

File metadata and controls

99 lines (89 loc) · 2.61 KB
Raw

Sensors List

Acronyms

  • CDH: Command and Data Handling:
  • DCIU: Digital Control Interface Unit
  • EPS: Electric Power System
  • ADCS: Attitude Determination Control System
  • RTC: Real Time Clock

Data Protocols

  • I2C/SPI
    • communication to sensors (e.g. voltage)
  • UART (serial)
    • debug interface, DCIU control, camera
  • GPIO
    • watchdog heartbeat pulse, bit-banging
  • RTC
    • button battery + crystal for ultra low-power timekeeping
  • CAN
    • data from comms module
  • ETH
    • ping from comms module
  • PWM
    • control for attitude actuators
  • USB Serial
    • development, debugging

From system breakdown slide

  • CDH needs to recieve telemetry from:
    • DCIU
    • Thermal Sensors
    • Transciever
    • EPS
    • ADCS
    • Structures
  • CDH needs to send commands to:
    • DCIU
    • Transciever
    • EPS
    • ADCS
    • Structures

Components Potential Options

  • CDH

    • Flight Computer:
      • Potential Options (Will we be using Beaglebone?)
        • Beaglebone Black
        • Raspberry Pi Zero
        • Teensy 3.6
        • Pumpkin
    • RTC
      • Potential Options: (What will we be using?)
    • Differential Amplifier
      • Potential Options: (What will we be using?)

  • ADCS

    • Reaction Wheels
      • Potential Options: (Which motor controller are we using? Will it be PWM?)
    • Magnetorquers
      • Potential Options (Which magnetorquer are we using?)
        • CubeTorquer
          • Nominal magnetic moment (2.5V @ 25 degC): +/- 0.24 Am2
          • Residual Moment: <0.48 mAm2
        • CubeCoil
          • Nominal magnetic moment (5V @ 25 degC): +/- 0.13 Am2
    • Camera
      • 4D Systems uCAM-III (Are we using this?)
        • Very good documentation
        • Auto WB, brightness, contrast; manual focus
        • Operate under -20C ~ 85C
        • Serial
        • Adjustable lens -> 115deg
    • IMU: Inertial Measurement Unit
      • CHRobotics UM7 Sensor (Are we using this?)
        • On-board Kalman Filtering
        • Outputs include euler angles, attitude quarternion
        • Raw data from Accelerometer, Gyroscope and Magnetometer
        • Magnetometer serves as external reference

  • EPS

    • Potential Options: (Which one are we using, and will there be a builtin controller, or will we use seperate senors?)
      • Pumpkin BM2 Battery Module
      • EXA BA0x Pegasus Class BA01/D
      • Panasonic NCR18650 (x6)

  • Thermal Sensors

    • Potential Options: (What will we be using?)

  • Communications Transciever:

    • Potential Options: (Which one will we be using?)
      • LimeSDR for data, functionality, and prototyping
      • Nanoavionics S-Band Transciever

  • DCIU:

    • UART connection
    • CDH simply commands "Startup", "Throttle Level 1", "Shutdown" etc.
    • Contains entire logic structure, calibration data, and throttle table for MiXI
    • (Is there a specification of the commands we can send?)