Package org.orekit.forces.maneuvers.propulsion

Class ScaledConstantThrustPropulsionModel

java.lang.Object

org.orekit.forces.maneuvers.propulsion.AbstractConstantThrustPropulsionModel

org.orekit.forces.maneuvers.propulsion.ScaledConstantThrustPropulsionModel

All Implemented Interfaces:

PropulsionModel, ThrustPropulsionModel, EventDetectorsProvider, ParameterDriversProvider

public class ScaledConstantThrustPropulsionModel
extends AbstractConstantThrustPropulsionModel

Thrust propulsion model with parameters (for estimation) represented by scale factors on the X, Y and Z axis of the spacecraft frame.

Since:

10.2

Author:

Maxime Journot

Field Summary

Fields

Modifier and Type	Field	Description
static final String	THRUSTX_SCALE_FACTOR	Parameter name for the scale factor on the X component of the thrust in S/C frame.
static final String	THRUSTY_SCALE_FACTOR	Parameter name for the scale factor on the Y component of the thrust in S/C frame.
static final String	THRUSTZ_SCALE_FACTOR	Parameter name for the scale factor on the Z component of the thrust in S/C frame.

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

DATATION_ACCURACY

Constructor Summary

Constructors

Constructor	Description
ScaledConstantThrustPropulsionModel(double thrust, double isp, Vector3D direction, String name)	Constructor with min/max deviation for the scale factors.

Method Summary

Modifier and Type	Method	Description
double	getFlowRate()	Get the flow rate (kg/s).
double	getFlowRate(double[] parameters)	Get the flow rate (kg/s).
double	getFlowRate(AbsoluteDate date)	Get the flow rate (kg/s).
<T extends CalculusFieldElement<T>> T	getFlowRate(T[] parameters)	Get the flow rate (kg/s).
List<ParameterDriver>	getParametersDrivers()	Get the drivers for parameters.
Vector3D	getThrustVector()	Get the thrust vector in spacecraft frame (N).
Vector3D	getThrustVector(double[] parameters)	Get the thrust vector in spacecraft frame (N).
Vector3D	getThrustVector(AbsoluteDate date)	Get the thrust vector in spacecraft frame (N).
<T extends CalculusFieldElement<T>> FieldVector3D<T>	getThrustVector(T[] parameters)	Get the thrust vector in spacecraft frame (N).

Methods inherited from class org.orekit.forces.maneuvers.propulsion.AbstractConstantThrustPropulsionModel

getControl3DVectorCostType, getDirection, getDirection, getFlowRate, getFlowRate, getFlowRate, getInitialFlowRate, getInitialThrustVector, getIsp, getIsp, getName, getThrustMagnitude, getThrustMagnitude, getThrustVector, getThrustVector, getThrustVector

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.utils.ParameterDriversProvider

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

Methods inherited from interface org.orekit.forces.maneuvers.propulsion.PropulsionModel

getEventDetectors, getFieldEventDetectors, init, init

Methods inherited from interface org.orekit.forces.maneuvers.propulsion.ThrustPropulsionModel

getAcceleration, getAcceleration, getDirection, getIsp, getMassDerivatives, getMassDerivatives

Field Details

THRUSTX_SCALE_FACTOR

public static final String THRUSTX_SCALE_FACTOR

Parameter name for the scale factor on the X component of the thrust in S/C frame.

See Also:

• Constant Field Values

THRUSTY_SCALE_FACTOR

public static final String THRUSTY_SCALE_FACTOR

Parameter name for the scale factor on the Y component of the thrust in S/C frame.

See Also:

• Constant Field Values

THRUSTZ_SCALE_FACTOR

public static final String THRUSTZ_SCALE_FACTOR

Parameter name for the scale factor on the Z component of the thrust in S/C frame.

See Also:

• Constant Field Values

Constructor Details

ScaledConstantThrustPropulsionModel

public ScaledConstantThrustPropulsionModel(double thrust,
 double isp,
 Vector3D direction,
 String name)

Constructor with min/max deviation for the scale factors. Typical usage is, for example, if you know that your propulsion system usually has an error of less than 10% then set the min/max to respectively 0.9 and 1.1.

Parameters:

thrust - the thrust (N)

isp - the isp (s)

direction - in spacecraft frame

name - the name of the maneuver

Method Details

getThrustVector

public Vector3D getThrustVector()

Get the thrust vector in spacecraft frame (N). Here it does not depend on current S/C state.

Specified by:

getThrustVector in class AbstractConstantThrustPropulsionModel

Returns:

thrust vector in spacecraft frame (N), will throw an exception if used on driver containing several value spans

getThrustVector

public Vector3D getThrustVector(AbsoluteDate date)

Get the thrust vector in spacecraft frame (N). Here it does not depend on current S/C state.

Specified by:

getThrustVector in class AbstractConstantThrustPropulsionModel

Parameters:

date - date at which the thrust vector wants to be known, often the date parameter will not be important and can be whatever if the thrust parameter driver as only value estimated over the all orbit determination interval

Returns:

thrust vector in spacecraft frame (N)

getFlowRate

public double getFlowRate()

Get the flow rate (kg/s). Here it does not depend on current S/C.

Specified by:

getFlowRate in class AbstractConstantThrustPropulsionModel

Returns:

flow rate (kg/s) will throw an exception if used on driver containing several value spans

getFlowRate

public double getFlowRate(AbsoluteDate date)

Get the flow rate (kg/s). Here it does not depend on current S/C.

Specified by:

getFlowRate in class AbstractConstantThrustPropulsionModel

Parameters:

date - date at which the thrust vector wants to be known, often the date parameter will not be important and can be whatever if the thrust parameter driver as only value estimated over the all orbit determination interval

Returns:

flow rate (kg/s)

getParametersDrivers

public List<ParameterDriver> getParametersDrivers()

Get the drivers for parameters.

Returns:

drivers for parameters

getThrustVector

public Vector3D getThrustVector(double[] parameters)

Get the thrust vector in spacecraft frame (N). Here it does not depend on current S/C state.

Specified by:

getThrustVector in class AbstractConstantThrustPropulsionModel

Parameters:

parameters - propulsion model parameters

Returns:

thrust vector in spacecraft frame (N)

getFlowRate

public double getFlowRate(double[] parameters)

Get the flow rate (kg/s). Here it does not depend on current S/C state.

Specified by:

getFlowRate in class AbstractConstantThrustPropulsionModel

Parameters:

parameters - propulsion model parameters

Returns:

flow rate (kg/s)

getThrustVector

public <T extends CalculusFieldElement<T>>
FieldVector3D<T> getThrustVector(T[] parameters)

Get the thrust vector in spacecraft frame (N). Here it does not depend on current S/C state.

Specified by:

getThrustVector in class AbstractConstantThrustPropulsionModel

Type Parameters:

T - extends CalculusFieldElement<T>

Parameters:

parameters - propulsion model parameters

Returns:

thrust vector in spacecraft frame (N)

getFlowRate

public <T extends CalculusFieldElement<T>> T getFlowRate(T[] parameters)

Get the flow rate (kg/s). Here it does not depend on current S/C state.

Specified by:

getFlowRate in class AbstractConstantThrustPropulsionModel

Type Parameters:

T - extends CalculusFieldElement<T>

Parameters:

parameters - propulsion model parameters

Returns:

flow rate (kg/s)