FGMassBalance Class Reference

#include <FGMassBalance.h>

Inherits FGModel.

List of all members.

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Detailed Description

Maintains a vector of point masses. Sums the contribution of all, and provides this to FGPropagate. Loads the <mass_balance> section of the aircraft configuration file.

Configuration File Format:

    <mass_balance>
        <ixx unit="{SLUG*FT2 | KG*M2}"> {number} </ixx>
        <iyy unit="{SLUG*FT2 | KG*M2}"> {number} </iyy>
        <izz unit="{SLUG*FT2 | KG*M2}"> {number} </izz>
        <ixy unit="{SLUG*FT2 | KG*M2}"> {number} </ixy>
        <ixz unit="{SLUG*FT2 | KG*M2}"> {number} </ixz>
        <iyz unit="{SLUG*FT2 | KG*M2}"> {number} </iyz>
        <emptywt unit="{LBS | KG"> {number} </emptywt>
        <location name="CG" unit="{IN | M}">
            <x> {number} </x>
            <y> {number} </y>
            <z> {number} </z>
        </location>
        <pointmass name="{string}">
            <weight unit="{LBS | KG}"> {number} </weight>
            <location name="POINTMASS" unit="{IN | M}">
                <x> {number} </x>
                <y> {number} </y>
                <z> {number} </z>
            </location>
        </pointmass>
        ... other point masses ...
    </mass_balance>

Definition at line 99 of file FGMassBalance.h.

Public Member Functions
void	AddPointMass (Element *el)
	FGMassBalance (FGFDMExec *)
FGMatrix33 &	GetJ (void)
FGMatrix33 &	GetJinv (void)
double	GetMass (void) const
FGMatrix33	GetPointmassInertia (double slugs, const FGColumnVector3 &r) const
	Computes the inertia contribution of a pointmass.
FGColumnVector3 &	GetPointMassMoment (void)
double	GetTotalPointMassWeight (void)
double	GetWeight (void) const
double	GetXYZcg (int axis) const
FGColumnVector3 &	GetXYZcg (void)
bool	InitModel (void)
bool	Load (Element *el)
	Loads this model.
bool	Run (void)
	Runs the model; called by the Executive.
void	SetAircraftBaseInertias (FGMatrix33 BaseJ)
void	SetBaseCG (const FGColumnVector3 &CG)
void	SetEmptyWeight (double EW)
FGColumnVector3	StructuralToBody (const FGColumnVector3 &r) const
	Conversion from the structural frame to the body frame.
Classes
struct	PointMass

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Member Function Documentation

FGMatrix33 GetPointmassInertia	(	double	slugs,
		const FGColumnVector3 &	r
	)			const [inline]

Computes and returns the inertia matrix of a pointmass of mass slugs at the given vector r in the structural frame. The units should be for the mass in slug and the vector in the structural frame as usual in inches.

Parameters:

	slugs	the mass of this single pointmass given in slugs
	r	the location of this single pointmass in the structural frame

Definition at line 123 of file FGMassBalance.h.

bool Load

(

Element *

el

)

[virtual]

Parameters:

el

a pointer to the element

Returns:

true if model is successfully loaded

Reimplemented from FGModel.

Definition at line 93 of file FGMassBalance.cpp.

bool Run

(

void

)

[virtual]

See also:

JSBSim.cpp documentation

Returns:

false if no error

Reimplemented from FGModel.

Definition at line 149 of file FGMassBalance.cpp.

FGColumnVector3 StructuralToBody

(

const FGColumnVector3 &

r

)

const

Converts the location given in the structural frame coordinate system to the body frame. The units of the structural frame are assumed to be in inches. The unit of the result is in ft.

Parameters:

r

vector coordinate in the structural reference frame (X positive aft, measurements in inches).

Returns:

vector coordinate in the body frame, in feet.

Definition at line 275 of file FGMassBalance.cpp.

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The documentation for this class was generated from the following files:

• FGMassBalance.h
• FGMassBalance.cpp