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

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