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speed, lateral path and vertical plan as computed
by the FMGCs,
- manual control of the aircraft with regard to speed
and vertical plan (selected through FCU), lateral
path (through FMGC or FCU).
STL 945.7136/97 10.4
A319/A320/A321 FMGS – system interface
FCDC 1
ELAC/SEC
Landing gear
Slats/flaps
ADIRS 1
ILS 1
RA 1
VOR 1
DME 1
Clock
Fuel
Data
base
loader
FADEC 1
To FAC 1
and FMGC 1
ADIRS 3
To FAC 2
FMGC 2 To system 2
To system 1
Side 1
Side 2
MCDU
ECU
FWC 1, 2
Radio navigation
auto tuning
EIS (DM 1, 2, 3)
ELAC-SEC
CFDIU
EIS (DMC 1, 2, 3)
Actuators for :
rudder trim
yaw trim damper
rudder travel
FMGC 1
• AP/FD/ATS
• Cruise and land
modes
• Lateral nav.
• Vertical nav.
• Performance
FAC 1
• Yaw damper
• Rudder travel
limiting
• Rudder trim
• Flight envelope
protection
• Yaw AP
STL 945.7136/97 10.5
A319/A320/A321 FMGS – system redundancy
FMGC 1 Crosstalk FMGC 2
buses
FMGC 1 FMGC 2
MCDU MCDU
MCDU MCDU
FMGC 1 FMGC 2
MCDU MCDU
Two FMGCs associated to two MCDUs provide a
redundant configuration.
Normal mode operation : dual mode
- Each FMGC makes its own computation
- One FMGC is MASTER – the other one is SLAVE
- Both MCDUs act independently (entries are
automatically recopied on the other MCDU and
applied to both FMGCs)
Independent mode
- Automatically operative if mismatch between
FMGCs
- Independent operation of FMGCs with associated
MCDUs. (Data insertion and display related to the
side concerned).
- One FMGC remains master.
Single mode
- One FMGC fails
- Either MCDU can be used to enter or display data
related to the remaining FMGC.
STL 945.7136/97 10.6
A319/A320/A321 FMGS crew interface
ND 1 control FCU ND 2 control
PFD 1 ND 1 ND 2 PFD 2
Guidance
display
Navigation
display
Navigation
display
Guidance
FADEC display
MCDU 1 Thrust levers MCDU 2
STL 945.7136/97 10.7
A319/A320/A321 FMGS crew interface
Two MCDUs on the central pedestal provide long-term
interface between the crew and FMGCs in terms of :
- flight plan definition and display
- data insertion (speeds, weights, cruise level, etc)
- selection of specific functions (direct to, offset,
secondary flight plan).
One FCU on the central glareshield to provide shortterm
interface between crew and FMGCs.
Two thrust levers linked to the FMGCs and FADECs
provide autothrust or manual thrust control selection to
the crew.
Two PFDs and two NDs provide visual interface with
flight management and guidance related data such as :
on PFD :
- FMGS guidance targets,
- armed and active modes
- system engagement status
on ND :
- flight plan presentation,
- aircraft position and flight path,
- navigation items (radio navaid, wind).
STL 945.7136/97 10.8
A319/A320/A321 FMGS flight guidance
Auto control
white lights
Heading / track
window
Vertical speed /
Flight Path angle
Altitude window
window
Auto control
white lights
Speed / Mach
Commutation
Speed / Mach
window
AP / A / THR
engagement
Mode engagement
Altitude
selection
V / S or FPA
selection
Control the display of selected altitude
(in meters) on lower ECAM (permanent data)
Managed guidance parameter window is dashed and auto control illuminated.
Managed speed guidance Lateral selected guidance
HDG or TRK
selection
SPD or TRK
selection
STL 945.7136/97 10.9
A319/A320/A321 FMGS flight guidance
The FCU is the main crew interface for short-term
guidance with a single rule for the various control
knobs :
- pull + rotate = pilot input
- push = return to FMGS control.
As an example, a change of altitude can be achieved
by a double action on the FCU :
- either by selection of a new altitude through the
FCU selector and validation of this new
altitude pushing (management guidance)
this knob.
- or by selection of a V / S through the FCU
selector and validation of this new V
/ S by pulling this knob.
Actions on the FCU are displayed on the FCU as well
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A319/A320/A321飞行员驾驶舱和系统简介(16)
