Aero.FixedWing.Specification Class

Namespace: Aero

Define Aero.FixedWing specification set

Since R2025a

Description

Use the Aero.FixedWing.Specification class to define the specification for the flying qualities modes, Phugoid, ShortPeriod, DutchRoll, Spiral, and RollSubsidence, of an Aero.FixedWing aircraft. A subclass can inherit the Aero.FixedWing.Specification.

Class Attributes

Sealed

true

For information on class attributes, see Class Attributes.

Creation

Description

fixedwing = Aero.FixedWing.Specification creates a single Aero.FixedWing.Specification object with default property values.

fixedwing = Aero.FixedWing.Specification(modes)creates an instance of an Aero.FixedWing.Specification object with default values for the flight dynamic modes specified in modes.

fixedWing = Aero.FixedWing(__,property,propertyValue) creates an array of Aero.FixedWing objects with property, propertyValue pairs applied to each of the Aero.FixedWing array objects. For a list of properties, see Properties.

Input Arguments

modes — Specification flight dynamic modes

Phugoid | ShortPeriod | DutchRoll | Spiral | RollSubsidence

Specification modes, specified as:

• Phugoid — Long period oscillation mode

• ShortPeriod — Short period oscillation mode

• DutchRoll — Roll and yaw mode

• Spiral — Spiral dive mode

• RollSubsidence — Roll damping mode

For more information, see Properties.

Properties

Phugoid — Long period oscillation mode

Aero.FixedWing.FlyingQuality.PhugoidMode (default)

Long period oscillation mode, specified as an Aero.FixedWing.FlyingQuality.PhugoidMode object. Default values of the object properties are:

Property	Value	Default	Data Type	Units
MinDampingRatio	scalar	-inf	double	Not applicable
MaxDampingRatio	scalar	inf	double	Not applicable
MinNaturalFrequency	scalar	0	double	rad/s
MaxNaturalFrequency	scalar	inf	double	rad/s
MaxTimeToHalf	scalar	inf	double	s
MinTimeToDouble	scalar	-inf	double	s
MaxRelativeAmplitude	scalar	inf after seven cycles	double	Not applicable
NCycles	scalar	7	integer	Not applicable

Attributes:

GetAccess	public
SetAccess	public

Data Types: string | char

ShortPeriod — Short period oscillation mode

Aero.FixedWing.FlyingQuality.ShortPeriodMode (default)

Short period oscillation mode, Angle system, specified as an Aero.FixedWing.FlyingQuality.ShortPeriodMode object. Default values of the object properties are:

Property	Value	Default	Data Type	Units
MinDampingRatio	scalar	-inf	double	Not applicable
MaxDampingRatio	scalar	inf	double	Not applicable
MinNaturalFrequency	scalar	0	double	rad/s
MaxNaturalFrequency	scalar	inf	double	rad/s
MaxTimeToHalf	scalar	inf	double	s
MinTimeToDouble	scalar	-inf	double	s
MaxRelativeAmplitude	scalar	inf after seven cycles	double	Not applicable
NCycles	scalar	7	integer	Not applicable

Attributes:

GetAccess	public
SetAccess	public

Data Types: string | char

DutchRoll — Roll and yaw mode

Aero.FixedWing.FlyingQuality.DutchRollMode (default)

Short period oscillation mode, Angle system, specified as an Aero.FixedWing.FlyingQuality.DutchRollMode object. Default values of the object properties are:

Property	Value	Default	Data Type	Units
MinDampingRatio	scalar	-inf	double	Not applicable
MaxDampingRatio	scalar	inf	double	Not applicable
MinNaturalFrequency	scalar	0	double	rad/s
MaxNaturalFrequency	scalar	inf	double	rad/s
MaxTimeToHalf	scalar	inf	double	s
MinTimeToDouble	scalar	-inf	double	s
MaxRelativeAmplitude	scalar	inf after seven cycles	double	Not applicable
NCycles	scalar	7	integer	Not applicable

Attributes:

GetAccess	public
SetAccess	public

Data Types: string | char

Spiral — Spiral dive

Aero.FixedWing.FlyingQuality.SpiralMode (default)

Short period oscillation mode, Angle system, specified as an Aero.FixedWing.FlyingQuality.SpiralMode object. Default values of the object properties are:

Property	Value	Default	Data Type	Units
MaxTimeToHalf	scalar	inf	double	seconds
MaxTimeConstant	scalar	inf	double	seconds

Attributes:

GetAccess	public
SetAccess	public

Data Types: string | char

RollSubsidence — Roll damping

Aero.FixedWing.FlyingQuality.RollSubsidenceMode (default)

Short period oscillation mode, Angle system, specified as an Aero.FixedWing.FlyingQuality.RollSubsidenceMode object. Default values of the object properties are:

Property	Value	Default	Data Type	Units
MaxTimeToHalf	scalar	inf	double	seconds
MaxTimeConstant	scalar	inf	double	seconds

Attributes:

GetAccess	public
SetAccess	public

Data Types: string | char

Methods

Public Methods

getModes	Return list of all modes active in flying quality analysis
setModes	Set list of flying quality analysis modes that are active given input modes
setPhugoidRequirements	Set requirements for phugoid mode for flying quality analysis
setShortPeriodRequirements	Set requirements for short period mode for flying quality analysis
setDutchRollRequirements	Set requirements for Dutch roll mode for flying quality analysis
setSpiralRequirements	Set requirements for spiral mode for flying quality analysis
setRollSubsidenceRequirements	Set requirements for roll subsidence mode for flying quality analysis
addPhugoidRequirementFunctions	Add custom requirement functions for phugoid modes
addShortPeriodRequirementFunctions	Add custom requirement functions for short period modes
addDutchRollRequirementFunctions	Add custom requirement functions for Dutch roll mode
setPhugoidRequirementFunctions	Set list of custom requirement functions for phugoid modes
setShortPeriodRequirementFunctions	Set list of custom requirement functions for short period modes
setDutchRollRequirementFunctions	Set list of custom requirement functions for Dutch roll modes

Examples

Analyze De Havilland Beaver Aircraft Flying Qualities

This example shows how to analyze the De Havilland Beaver aircraft against the specification values in a default Aero.FixedWing.Specification object.

Get the aircraft and state values for the De Havilland Beaver aircraft.

[aircraft, state] = astDehavillandBeaver();

Create a Aero.FixedWing.Specification object with default values and set it to FixedWingSpec, and then call the analyzeFlyingQualities method using aircraft, state, and FixedWingSpec.

FixedWingSpec = Aero.FixedWing.Specification();
AnalysisResult = analyzeFlyingQualities(aircraft,state,FixedWingSpec)

AnalysisResult = 
             Modes: ["Phugoid"    "ShortPeriod"    "DutchRoll"    "Spiral"    "RollSubsidence"]
           Phugoid: [1×1 struct]
       ShortPeriod: [1×1 struct]
         DutchRoll: [1×1 struct]
            Spiral: [1×1 struct]
    RollSubsidence: [1×1 struct]
       IsCompliant: 1

Version History

Introduced in R2025a