Pack net_fdm Packet for FlightGear

Generate net_fdm packet for FlightGear

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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

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.

Open Live Script

Ports

Input

Position/Attitude Inputs

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

Velocity/Acceleration Inputs

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

V_cas — 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

v_north — 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

v_east — 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

v_down — 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

v_{wind 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

v_{wind 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

v_{wind 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

A_{X 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

A_{Y 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

A_{Z 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

Control Surface Position Inputs

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

Engine/Fuel Inputs

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

Landing Gear Inputs

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

Environment Inputs

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
`longitude`	rad	double	1	Geodetic longitude
`latitude`	rad	double	1	Geodetic latitude
`altitude`	m	double	1	Altitude above sea level
`theta`	rad	single	1	Pitch
`phi`	rad	single	1	Roll
`psi`	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
`alpha`	rad	double	1	Angle of attack
`beta`	rad	single	1	Sideslip angle
`dphi/dt`	rad/sec	single	1	Roll rate
`dtheta/dt`	rad/sec	single	1	Pitch rate
`dpsi/dt`	rad/sec	single	1	Yaw rate
`Vcas`	knot	single	1	Calibrated airspeed
`climb_rate`	feet/sec	single	1	Rate of climb
`v_north`	feet/sec	single	1	North velocity in body frame
`v_east`	feet/sec	single	1	East velocity in body frame
`v_down`	feet/sec	single	1	Down velocity
`v_wind_body_north`	feet/sec	single	1	North velocity in body frame relative to local airmass
`v_wind_body_east`	feet/sec	single	1	East velocity in body frame relative to local airmass
`v_wind_body_down`	feet/sec	single	1	Down velocity in body frame relative to airmass
`Axpilot`	feet/sec²	single	1	X acceleration in body frame
`Aypilot`	feet/sec²	single	1	Y acceleration in body frame
`Azpilot`	feet/sec²	single	1	Z acceleration in body frame
`stall_warning`	—	single	1	Amount of stall [0-1]
`slip_deg`	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
`elevator`	1 (dimensionless)	single	1	Normalized elevator position
`elevator_trim_tab`	1 (dimensionless)	single	1	Normalized elevator trim tab position
`left_flap`	1 (dimensionless)	single	1	Normalized left flap position
`right_flap`	1 (dimensionless)	single	1	Normalized right flap position
`left_aileron`	1 (dimensionless)	single	1	Normalized left aileron position
`right_aileron`	1 (dimensionless)	single	1	Normalized right aileron position
`rudder`	1 (dimensionless)	single	1	Normalized rudder position
`nose_wheel`	1 (dimensionless)	single	1	Normalized nose wheel position
`speedbrake`	1 (dimensionless)	single	1	Normalized speedbrake position
`spoilers`	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
`num_engines`	—	uint32	1	Number of engines
`eng_state`	—	uint32	4	Engine state (off, cranking, running)
`rpm`	rev/min	single	4	Engine RPM
`fuel_flow`	gal/hour	single	4	Fuel flow
`fuel_px`	psi	single	4	Fuel pressure
`egt`	deg F	single	4	Exhaust gas temperature
`cht`	deg F	single	4	Cylinder head temperature
`mp_osi`	psi	single	4	Manifold pressure
`tit`	deg F	single	4	Turbine inlet temperature
`oil_temp`	deg F	single	4	Oil temperature
`oil_px`	psi	single	4	Oil pressure
`num_tanks`	—	uint32	1	Number of fuel tanks
`fuel_quantity`	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
`num_wheels`	—	uint32	1	Number of wheels
`wow`	—	uint32	3	Weight on wheels switch
`gear_pos`	—	single	3	Landing gear normalized position
`gear_steer`	—	single	3	Landing gear normalized steering
`gear_compression`	—	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
`agl`	m	single	1	Altitude above ground level
`cur_time`	sec	uint32	1	Current UNIX time
`warp`	sec	int32	1	Offset in seconds to UNIX time
`visibility`	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

See Also

FlightGear Preconfigured 6DoF Animation | Generate Run Script | Receive net_ctrl Packet from FlightGear | Send net_fdm Packet to FlightGear | Unpack net_ctrl Packet from FlightGear

Topics