org.orekit.forces.maneuvers.propulsion

Class BasicConstantThrustPropulsionModel

java.lang.Object

org.orekit.forces.maneuvers.propulsion.AbstractConstantThrustPropulsionModel

org.orekit.forces.maneuvers.propulsion.BasicConstantThrustPropulsionModel

All Implemented Interfaces:

PropulsionModel, ThrustPropulsionModel

public class BasicConstantThrustPropulsionModel
extends AbstractConstantThrustPropulsionModel

Constant thrust propulsion model with: - Constant thrust direction in spacecraft frame - Parameter drivers (for estimation) for the thrust norm or the flow rate. Note that both parameters CANNOT be selected at the same time since they depend on one another.

Since:

10.2

Author:

Maxime Journot

Field Summary

Fields

Modifier and Type	Field and Description
static String	FLOW_RATE Parameter name for flow rate.
static double	FLOW_RATE_SCALE Flow rate scaling factor.
static String	THRUST Parameter name for thrust.
static double	THRUST_SCALE Thrust scaling factor.

Constructor Summary

Constructors

Constructor and Description
BasicConstantThrustPropulsionModel(double thrust, double isp, Vector3D direction, String name) Simple constructor.

Method Summary

Modifier and Type	Method and Description
double	getFlowRate() Get the flow rate (kg/s).
double	getFlowRate(double[] parameters) 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 propulsion model parameter drivers.
Vector3D	getThrustVector() Get the thrust vector in spacecraft frame (N).
Vector3D	getThrustVector(double[] parameters) 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

getDirection, getFlowRate, getFlowRate, getFlowRate, getInitialFlowrate, getInitialThrustVector, getIsp, getName, getThrust, 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.forces.maneuvers.propulsion.ThrustPropulsionModel

getAcceleration, getAcceleration, getDirection, getIsp, getMassDerivatives, getMassDerivatives, getThrust

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

init

Field Detail

THRUST

public static final String THRUST

Parameter name for thrust.

See Also:

Constant Field Values

FLOW_RATE

public static final String FLOW_RATE

Parameter name for flow rate.

See Also:

Constant Field Values

THRUST_SCALE

public static final double THRUST_SCALE

Thrust scaling factor.

We use a power of 2 to avoid numeric noise introduction in the multiplications/divisions sequences.

FLOW_RATE_SCALE

public static final double FLOW_RATE_SCALE

Flow rate scaling factor.

We use a power of 2 to avoid numeric noise introduction in the multiplications/divisions sequences.

Constructor Detail

BasicConstantThrustPropulsionModel

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

Simple constructor.

Parameters:

thrust - thrust (N)

isp - isp (s)

direction - direction in spacecraft frame

name - name of the maneuver

Method Detail

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)

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)

getParametersDrivers

public List<ParameterDriver> getParametersDrivers()

Get the propulsion model parameter drivers.

Returns:

propulsion model parameter drivers

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)