Pack net_fdm Packet for FlightGear
Generate net_fdm
packet for FlightGear
Libraries:
Aerospace Blockset /
Animation /
Flight Simulator Interfaces
Description
The Pack net_fdm Packet for FlightGear block creates, from
separate inputs, a FlightGear net_fdm
data packet compatible with a
particular version of FlightGear flight simulator. This block accepts all signals
supported by the FlightGear net_fdm
data packet. These signals are
arranged into six groups:
Position/attitude inputs
Velocity/acceleration inputs
Control surface position inputs
Engine/fuel inputs
Landing gear inputs
Environment inputs
To enable or disable the inputs for these groups, select the associated block parameter. The block input ports change depending on the requested signal groups. The block inserts zeros for packet values that are part of inactive signal groups.
The Aerospace Blockset™ product supports FlightGear versions starting from v2.6. If you are using a FlightGear version older than 2.6, the model displays a notification from the Simulink® Upgrade Advisor. Consider using the Upgrade Advisor to upgrade your FlightGear version. For more information, see Supported FlightGear Versions.
Examples
HL-20 Project with Optional FlightGear Interface
Model NASA HL-20 lifting body and controller modeled in Simulink and Aerospace Blockset, using FlightGear for visualization.
Ports
Input
l — Longitude
scalar
Longitude, specified as a scalar, in rad.
Dependencies
To enable this port, select the Show position/attitude inputs check box.
Data Types: double
μ — Latitude
scalar
Latitude, specified as a scalar, in rad.
Dependencies
To enable this port, select the Show position/attitude inputs check box.
Data Types: double
h — Altitude
scalar
Altitude, specified as a scalar, in m.
Dependencies
To enable this port, select the Show position/attitude inputs check box.
Data Types: double
ϕ — Roll
scalar
Roll, specified as a scalar, in rad.
Dependencies
To enable this port, select the Show position/attitude inputs check box.
Data Types: single
θ — Pitch
scalar
Pitch, specified as a scalar, in rad.
Dependencies
To enable this port, select the Show position/attitude inputs check box.
Data Types: single
ψ — Yaw
scalar
Yaw, specified as a scalar, in rad.
Dependencies
To enable this port, select the Show position/attitude inputs check box.
Data Types: single
α — Angle of attack
scalar
Angle of attack, specified as a scalar, in rad.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
β — Sideslip angle
scalar
Sideslip angle, specified as a scalar, in rad.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
dφ/dt — Roll rate
scalar
Roll rate, specified as a scalar, in rad/sec.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
dθ/dt — Pitch rate
scalar
Pitch rate, specified as a scalar, in rad/sec.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
dψ/dt — Yaw rate
scalar
Yaw rate, specified as a scalar, in rad/sec.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
Vcas — Calibrated airspeed
scalar
Calibrated airspeed, specified as a scalar, in knots.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
climb_rate — Rate of climb
scalar
Rate of climb, specified as a scalar, in feet/sec.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
vnorth — North velocity in body frame
scalar
North velocity in body frame, specified as a scalar, in ft/sec.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
veast — East velocity in body frame
scalar
East velocity in body frame, specified as a scalar, in feet/sec.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
vdown — Down velocity
scalar
Down velocity, specified as a scalar, in feet/sec.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
vwind body north — North velocity in body frame relative to local airmass
scalar
North velocity in body frame relative to local airmass, specified as a scalar, in ft/sec.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
vwind body east — East velocity in body frame relative to local airmass
scalar
East velocity in body frame relative to local airmass, specified as a scalar, in ft/sec.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
vwind body down — Down velocity in body frame relative to airmass
scalar
Down velocity in body frame relative to airmass, specified as a scalar, in ft/sec.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
AX pilot — X acceleration in body frame
scalar
X acceleration in body frame, specified as a scalar, in ft/sec2.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
AY pilot — Y acceleration in body frame
scalar
Y acceleration in body frame, specified as a scalar, in ft/sec2.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
AZ pilot — Z acceleration in body frame
scalar
Z acceleration in body frame, specified as a scalar, in ft/sec2.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
stall_warning — Amount of stall
scalar
Amount of stall [0-1], specified as a scalar.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
slip_degree — Slip ball deflection
scalar
Slip ball deflection, specified as a scalar, in degrees.
Dependencies
To enable this port, select the Show velocity/acceleration inputs check box.
Data Types: single
elevator — Normalized elevator position
scalar
Normalized elevator position, specified as a scalar.
Dependencies
To enable this port, select the Show control surface position inputs check box.
Data Types: single
elevator_trim_tab — Normalized elevator trim tab position
scalar
Normalized elevator trim tab position, specified as a scalar.
Dependencies
To enable this port, select the Show control surface position inputs check box.
Data Types: single
left_flap — Normalized left flap position
scalar
Normalized left flap position, specified as a scalar.
Dependencies
To enable this port, select the Show control surface position inputs check box.
Data Types: single
right_flap — Normalized right flap position
scalar
Normalized right flap position, specified as a scalar.
Dependencies
To enable this port, select the Show control surface position inputs check box.
Data Types: single
left_aileron — Normalized left aileron position
scalar
Normalized left aileron position. specified as a scalar.
Dependencies
To enable this port, select the Show control surface position inputs check box.
Data Types: single
right_aileron — Normalized right aileron position
scalar
Normalized right aileron position, specified as a scalar.
Dependencies
To enable this port, select the Show control surface position inputs check box.
Data Types: single
rudder — Normalized rudder position
scalar
Normalized rudder position, specified as a scalar.
Dependencies
To enable this port, select the Show control surface position inputs check box.
Data Types: single
nose_wheel — Normalized nose wheel position
scalar
Normalized nose wheel position, specified as a scalar.
Dependencies
To enable this port, select the Show control surface position inputs check box.
Data Types: single
speedbrake — Normalized speedbrake position
scalar
Normalized speedbrake position, specified as a scalar.
Dependencies
To enable this port, select the Show control surface position inputs check box.
Data Types: single
spoilers — Normalized spoilers position
scalar
Normalized spoilers position, specified as a scalar.
Dependencies
To enable this port, select the Show control surface position inputs check box.
Data Types: single
num_engines — Number of engines
scalar
Number of engines, specified as a scalar.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: uint32
eng_state — Engine state
vector
Engine state (off, cranking, running), specified as a vector.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: uint32
rpm — Engine RPM
vector
Engine RPM, specified as a vector, in rev/min.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: single
fuel_flow — Fuel flow
vector
Fuel flow, specified as a vector, in gal/hr.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: single
fuel_px — Fuel pressure
vector
Fuel pressure, specified as a vector, in psi.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: single
egt — Exhaust gas temperature
vector
Exhaust gas temperature, specified as a vector, in deg F.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: single
cht — Cylinder head temperature
scalar
Cylinder head temperature, specified as a vector, in deg F.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: single
mp_osi — Manifold pressure
vector
Manifold pressure, specified as a vector, in psi.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: single
tit — Turbine inlet temperature
vector
Turbine inlet temperature, specified as a vector, in deg F.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: single
oil_temp — Oil temperature
vector
Oil temperature, specified as a vector, in deg F.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: single
oil_px — Oil pressure
vector
Oil pressure, specified as a vector, in psi.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: single
num_tanks — Number of fuel tanks
scalar
Number of fuel tanks, specified as a scalar.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: uin32
fuel_quantity — Fuel quantity per tank
vector
Fuel quantity per tank, specified as a vector, in gal.
Dependencies
To enable this port, select the Show engine/fuel inputs check box.
Data Types: single
num_wheels — Number of wheels
scalar
Number of wheels, specified as a scalar.
Dependencies
To enable this port, select the Show landing gear inputs check box.
Data Types: uint32
wow — Weight on wheels switch
vector
Weight on wheels switch, specified as a vector.
Dependencies
To enable this port, select the Show landing gear inputs check box.
Data Types: uint32
gear_pos — Landing gear normalized position
vector
Landing gear normalized position, specified as a vector.
Dependencies
To enable this port, select the Show landing gear inputs check box.
Data Types: single
gear_steer — Landing gear normalized steering
vector
Landing gear normalized steering, specified as a vector.
Dependencies
To enable this port, select the Show landing gear inputs check box.
Data Types: single
gear_compression — Landing gear normalized compression
vector
Landing gear normalized compression, specified as a vector.
Dependencies
To enable this port, select the Show landing gear inputs check box.
Data Types: single
agl — Altitude above ground level
scalar
Altitude above ground level, specified as a scalar, in m.
Dependencies
To enable this port, select the Show environment inputs check box.
Data Types: single
cur_time — Current UNIX® time
scalar
Current UNIX time, specified as a scalar, in sec.
Dependencies
To enable this port, select the Show environment inputs check box.
Data Types: uint32
warp — Offset in seconds to UNIX time
scalar
Offset in seconds to UNIX time, specified as a scalar, in sec.
Dependencies
To enable this port, select the Show environment inputs check box.
Data Types: int32
visibility — Visibility
scalar
Visibility (for visual effects), specified as a scalar, in m.
Dependencies
To enable this port, select the Show environment inputs check box.
Data Types: single
Output
net_fdm — Packet generated for FlightGear
array
Packet generated for FlightGear, specified as an array.
Data Types: single
| double
| uint32
Parameters
Show position/altitude inputs — Position and altitude inputs
on
(default) | off
Select this check box to include the position and altitude inputs in the
FlightGear net_fdm
data packet.
Dependencies
Select this check box to enable these input ports.
Signal Group 1: Position/Altitude Inputs
Name | Units | Type | Width | Description |
---|---|---|---|---|
| rad | double | 1 | Geodetic longitude |
| rad | double | 1 | Geodetic latitude |
| m | double | 1 | Altitude above sea level |
| rad | single | 1 | Pitch |
| rad | single | 1 | Roll |
| rad | single | 1 | Yaw |
Programmatic Use
Block Parameter:
ShowPositionAttitudeInputs |
Type: character vector |
Values:
'off' | 'on' |
Default:
'on' |
Show velocity/acceleration inputs — Velocity and acceleration inputs
off
(default) | on
Select this check box to include the velocity and acceleration inputs in
the FlightGear net_fdm
data packet.
Dependencies
Select this check box to enable these input ports.
Signal Group 2: Velocity/Acceleration Inputs
Name | Units | Type | Width | Description |
---|---|---|---|---|
| rad | double | 1 | Angle of attack |
| rad | single | 1 | Sideslip angle |
| rad/sec | single | 1 | Roll rate |
| rad/sec | single | 1 | Pitch rate |
| rad/sec | single | 1 | Yaw rate |
| knot | single | 1 | Calibrated airspeed |
| feet/sec | single | 1 | Rate of climb |
| feet/sec | single | 1 | North velocity in body frame |
| feet/sec | single | 1 | East velocity in body frame |
| feet/sec | single | 1 | Down velocity |
| feet/sec | single | 1 | North velocity in body frame relative to local airmass |
| feet/sec | single | 1 | East velocity in body frame relative to local airmass |
| feet/sec | single | 1 | Down velocity in body frame relative to airmass |
| feet/sec2 | single | 1 | X acceleration in body frame |
| feet/sec2 | single | 1 | Y acceleration in body frame |
| feet/sec2 | single | 1 | Z acceleration in body frame |
| — | single | 1 | Amount of stall [0-1] |
| degrees | single | 1 | Slip ball deflection |
Programmatic Use
Block Parameter:
ShowVelocityAccelerationInputs |
Type: character vector |
Values:
'off' | 'on' |
Default:
'off' |
Show control surface position inputs — Control surface position inputs
off
(default) | on
Select this check box to include the control surface position inputs in
the FlightGear net_fdm
data packet.
Dependencies
Select this check box to enable these input ports.
Signal Group 3: Control Surface Position Inputs
Name | Units | Type | Width | Description |
---|---|---|---|---|
| 1 (dimensionless) | single | 1 | Normalized elevator position |
| 1 (dimensionless) | single | 1 | Normalized elevator trim tab position |
| 1 (dimensionless) | single | 1 | Normalized left flap position |
| 1 (dimensionless) | single | 1 | Normalized right flap position |
| 1 (dimensionless) | single | 1 | Normalized left aileron position |
| 1 (dimensionless) | single | 1 | Normalized right aileron position |
| 1 (dimensionless) | single | 1 | Normalized rudder position |
| 1 (dimensionless) | single | 1 | Normalized nose wheel position |
| 1 (dimensionless) | single | 1 | Normalized speedbrake position |
| 1 (dimensionless) | single | 1 | Normalized spoilers position |
Programmatic Use
Block Parameter:
ShowControlSurfacePositionInputs |
Type: character vector |
Values:
'off' | 'on' |
Default:
'off' |
Show engine/fuel inputs — Engine and fuel inputs
off
(default) | on
Select this check box to include the engine and fuel inputs in the
FlightGear net_fdm
data packet.
Dependencies
Select this check box to enable these input ports.
Signal Group 4: Engine/Fuel Inputs
Name | Units | Type | Width | Description |
---|---|---|---|---|
| — | uint32 | 1 | Number of engines |
| — | uint32 | 4 | Engine state (off, cranking, running) |
| rev/min | single | 4 | Engine RPM |
| gal/hour | single | 4 | Fuel flow |
| psi | single | 4 | Fuel pressure |
| deg F | single | 4 | Exhaust gas temperature |
| deg F | single | 4 | Cylinder head temperature |
| psi | single | 4 | Manifold pressure |
| deg F | single | 4 | Turbine inlet temperature |
| deg F | single | 4 | Oil temperature |
| psi | single | 4 | Oil pressure |
| — | uint32 | 1 | Number of fuel tanks |
| gal | single | 4 | Fuel quantity per tank |
Programmatic Use
Block Parameter:
ShowEngineFuelInputs |
Type: character vector |
Values:
'off' | 'on' |
Default:
'off' |
Show landing gear inputs — Landing gear inputs
off
(default) | on
Select this check box to include the landing gear inputs in the FlightGear
net_fdm
data packet.
Dependencies
Select this check box to enable these input ports.
Signal Group 5: Landing Gear Inputs
Name | Units | Type | Width | Description |
---|---|---|---|---|
| — | uint32 | 1 | Number of wheels |
| — | uint32 | 3 | Weight on wheels switch |
| — | single | 3 | Landing gear normalized position |
| — | single | 3 | Landing gear normalized steering |
| — | single | 3 | Landing gear normalized compression |
Programmatic Use
Block Parameter:
ShowLandingGearInputs |
Type: character vector |
Values:
'off' | 'on' |
Default:
'off' |
Show environment inputs — Environment inputs
off
(default) | on
Select this check box to include the environment inputs in the FlightGear
net_fdm
data packet.
Dependencies
Select this check box to enable these input ports.
Signal Group 6: Environment Inputs
Name | Units | Type | Width | Description |
---|---|---|---|---|
| m | single | 1 | Altitude above ground level |
| sec | uint32 | 1 | Current UNIX time |
| sec | int32 | 1 | Offset in seconds to UNIX time |
| m | single | 1 | Visibility in meters (for visual effects) |
Programmatic Use
Block Parameter:
ShowEnvironmentInputs |
Type: character vector |
Values:
'off' | 'on' |
Default:
'off' |
Sample time — Sample time
1/30
(default) | scalar
Specify the sample time (-1 for inherited).
Programmatic Use
Block Parameter:
SampleTime |
Type: character vector |
Values: scalar |
Default:
'1/30' |
Version History
Introduced before R2006a
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