DFCS
digital flight control system
Embedded Files
input sources
inputs
process/purpose/objective
outputs
output consumers
civil aircraft:
pilot (flight controls) ==> DFCC ==> actuator commands ==> Actuators ==> control surfaces
pitch ==> elevator
roll ==> aileron
yaw ==> rudder
fly-by-wire flight control system
primary control surfaces: elevator, rudder, aileron
secondary control surfaces: spoilers, slats, flaps, trim tabs
flight controls: control stick (pitch, roll), rudder pedals (yaw)
1/2. pilot (control stick, rudder pedals), flight control panel, other avionics (ADS, FMS, AHRS/IRS) ==> pitch, roll, yaw (A/C attitude)
3. DFCC ==> algorithms - control laws (CLAW)
4. outputs: control surface commands / actuator commands
5. actuators --> control surfaces (primary - elevons, rudder, secondary -slats, airbrakes)
LCA (Light Combat Aircraft), HAL Tejas
control surfaces: 13 --> 5 + 8
primary (5) - elevator, aileron ==> ELEVON (4 - 2/2) - LOE, LIE / RIE, ROE - pitch and roll
rudder ==> RUDDER (1) - yaw
secondary (8) - slats, ==> SLATS (6 - 3/3) - LIS, LMS, LOS / RIS, RMS, ROS - lift
spoilers ==> AIRBRAKES (2 - 1/1) - LA, RA - drag
DFCC ==> redundancy level ==> 4 (quadruplex)
DFCC1/CH1, DFCC2/CH2, DFCC3/CH3, DFCC4/CH4
LRU ==> line replaceable unit
processor: i960 intel processor (32-bit)
programming language: Ada (development), testing (C/Ada)
The flight control computer receives mode selections from the flight control panel and sensor information from the air data system, navigation systems, attitude and heading reference system, radio altimeter and surface position sensors.
The FCC’s use altitude and heading reference system (AHRS) and air data computer (ADC) system information to calculate flight path and control parameters.
DOD-STD-2167A Defense Systems Software Development ==> CEMILAC
Page updated
Google Sites
Report abuse