Avionics Flashcards
Learn critical avionics components.
What is the primary purpose of the “Comm” Flight Computer?
The “Comm” flight computer acts as a bridge between HLS and Orion, and also runs all the cabin systems.
What is the primary purpose of the “Deck” Flight Computer?
The “Deck flight computer runs all the systems in the garage and airlocks, and isolates the vehicle from all systems driven by the “Main” computer.
What is the primary purpose of the “Main” Flight Computer?
It runs all the critical vehicle propulsion and control systems.
What is the primary purpose of the “Gateway” Flight Computer?
IT connects to the Ground Infrastructure through the Quick Disconnect (QD).
How many computer strings does the V4H flight computer?
3
What is the Fault Tolerance for this hardware for LOM?
1FT to LOM
What is Fault Tolerance to LOC?
2FT to credible catastrophic hazards that result in LOC.
Where do the flight computers reside?
Comm FC is in forward nose, Deck and Main computers are in Garage, and Gateway computer is in Aft.
What is the box I/O for the flight computer
3x RS-422 (1 per string); 6x 1000Base-T Ethernet connections (2 per string)
What is the primary purpose of the Sensor DAQ?
To sense vehicle temperatures and pressure sensors
What is the Fault Tolerance for the Sensor DAQ?
1 FT to any single network, power or microcontroller fault (requires 2 of 3 strings to work for voting)
What is the Box I/O for the Sensor DAQ
3x 100Base-TX Ethernet inputs; 18x RTD
What is the primary purpose of the Stage Controller?
To actuate valves, read pressure transducers and RTDs.
What is the box I/O for the Stage Controller?
2x100Base-TX Ethernet inputs; 12 x Valve drivers; 6x RTDs
What is the FT of the Stage Controller?
1 FT to power, network, and microcontroller faults.
What components make up the Flight Computation System?
4 V4H Flight Computers. The Comm, Deck, Main and Gateway.
What is the purpose of the Display Computer?
To control vehicle displays on the bridge and airlock.
What is the box I/O for the Display computer?
1x48Vdc; 1x1000Base-T Ethernet input; 1x LVDS display connection (tentative), 1x 12Vdc power output, 1x USB for touch feedback
What is the Fault Tolerance for the Display Computer
0 FT to vehicle network and power faults on bridge
What is the primary purpose of the Backbone Hub?
To distribute vehicle power and communications.
What are the box I/O for the Backbone Hub?
2xHV DC pwr inputs, 2x 1000Base-T Ethernet input, 12x 48Vdc switched outputs, 12x 1000Base-T Ethernet outputs.
What is the Fault Tolerance of the Backbone Hub?
1 FT to network faults (network switch internal cross-strap)
0 FT to HV inputs (takes down associated LV power output ports)(trade fixing)
What is the primary purpose of the Lighting-Bolt Controller
To provide lighting drivers and provides capability to activate Frangibolts.
What is the Box I/O of the LightingBolt Controller?
2x48Vdc power inputs, 2x100Base-TX Ethernet inputs, 12x constant current outputs
What is the Fault tolerance for the lighting bolt controller?
1FT. Any single network, power or microcontroller fault results in a loss of one string of constant current outputs.
What is the primary purpose of the Audio/Button Controller?
To provide hardline audio capability to the vehicle. Drives speakers, headsets, reads microphones and senses buttons.
What is the fault tolerance of the Audio/Button Controller?
1 FT to network, power, and microcontroller faults.
What is the primary purpose of the StarTrekker?
To determine vehicle attitude using star tracking.
What are the box I/O for the StarTrekker?
1x 48Vdc power input, 1x 100Base-TX Ethernet
What is the fault tolerance for the StarTrekker?
0 FT to all faults
What is the primary purpose of the TRN NavCam?
To calculate vehicle position relative to lunar surface using terrain relative navigation imaging.
What is the box I/O for the TRN NavCam?
1x 48Vdc power input, 1x 100Base-TX Ethernet
What is the fault tolerance for the TRN NavCam?
0 FT to all faults.
