Package org.orekit.propagation.numerical.cr3bp

Class CR3BPForceModel

java.lang.Object

org.orekit.propagation.numerical.cr3bp.CR3BPForceModel

All Implemented Interfaces:

ForceModel, EventDetectorsProvider, ParameterDriversProvider

public class CR3BPForceModel
extends Object
implements ForceModel

Class calculating the acceleration induced by CR3BP model.

Since:

10.2

Author:

Vincent Mouraux

See Also:

• "Dynamical systems, the three-body problem, and space mission design, Koon, Lo, Marsden, Ross"

Field Summary

Fields

Modifier and Type	Field	Description
static final String	MASS_RATIO_SUFFIX	Suffix for parameter name for Mass Ratio enabling Jacobian processing.

Fields inherited from interface org.orekit.propagation.events.EventDetectorsProvider

DATATION_ACCURACY

Constructor Summary

Constructors

Constructor	Description
CR3BPForceModel(CR3BPSystem cr3bp)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
<T extends CalculusFieldElement<T>> FieldVector3D<T>	acceleration(FieldSpacecraftState<T> s, T[] parameters)	Compute acceleration.
Vector3D	acceleration(SpacecraftState s, double[] parameters)	Compute acceleration.
boolean	dependsOnPositionOnly()	Check if force model depends on position only at a given, fixed date.
List<ParameterDriver>	getParametersDrivers()	Get the drivers for parameters.
<T extends CalculusFieldElement<T>> FieldDerivativeStructure<T>	getPotential(FieldSpacecraftState<T> s)	Calculate spacecraft potential.
DerivativeStructure	getPotential(SpacecraftState s)	Calculate spacecraft potential.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.orekit.propagation.events.EventDetectorsProvider

getDateDetector, getEventDetectors, getFieldDateDetector, getFieldEventDetectors

Methods inherited from interface org.orekit.forces.ForceModel

addContribution, addContribution, dependsOnAttitudeRate, getEventDetectors, getFieldEventDetectors, getMassDerivative, getMassDerivative, init, init

Methods inherited from interface org.orekit.utils.ParameterDriversProvider

getNbParametersDriversValue, getParameterDriver, getParameters, getParameters, getParameters, getParameters, getParametersAllValues, getParametersAllValues, isSupported

Field Details

MASS_RATIO_SUFFIX

public static final String MASS_RATIO_SUFFIX

Suffix for parameter name for Mass Ratio enabling Jacobian processing.

See Also:

• Constant Field Values

Constructor Details

CR3BPForceModel

public CR3BPForceModel(CR3BPSystem cr3bp)

Simple constructor.

Parameters:

cr3bp - Name of the CR3BP System

Method Details

acceleration

public Vector3D acceleration(SpacecraftState s,
 double[] parameters)

Compute acceleration.

Specified by:

acceleration in interface ForceModel

Parameters:

s - current state information: date, kinematics, attitude

parameters - values of the force model parameters at state date, only 1 value for each parameterDriver

Returns:

acceleration in same frame as state

acceleration

public <T extends CalculusFieldElement<T>>
FieldVector3D<T> acceleration(FieldSpacecraftState<T> s,
 T[] parameters)

Compute acceleration.

Specified by:

acceleration in interface ForceModel

Type Parameters:

T - type of the elements

Parameters:

s - current state information: date, kinematics, attitude

parameters - values of the force model parameters at state date, only 1 value for each parameterDriver

Returns:

acceleration in same frame as state

getPotential

public DerivativeStructure getPotential(SpacecraftState s)

Calculate spacecraft potential.

Parameters:

s - SpacecraftState

Returns:

Spacecraft Potential

getPotential

public <T extends CalculusFieldElement<T>>
FieldDerivativeStructure<T> getPotential(FieldSpacecraftState<T> s)

Calculate spacecraft potential.

Type Parameters:

T - Field element

Parameters:

s - SpacecraftState

Returns:

Spacecraft Potential

getParametersDrivers

public List<ParameterDriver> getParametersDrivers()

Get the drivers for parameters.

Specified by:

getParametersDrivers in interface ParameterDriversProvider

Returns:

drivers for parameters

dependsOnPositionOnly

public boolean dependsOnPositionOnly()

Check if force model depends on position only at a given, fixed date.

Specified by:

dependsOnPositionOnly in interface ForceModel

Returns:

true if force model depends on position only, false if it depends on mass or velocity, either directly or due to a dependency on attitude