fr.cnes.sirius.patrius.attitudes.profiles

Class AngularVelocitiesHarmonicProfile

java.lang.Object

fr.cnes.sirius.patrius.attitudes.profiles.AbstractAttitudeProfile

fr.cnes.sirius.patrius.attitudes.profiles.AngularVelocitiesHarmonicProfile

All Implemented Interfaces:

AttitudeLeg, AttitudeProvider, AttitudeProfile, Leg, Serializable

public final class AngularVelocitiesHarmonicProfile
extends AbstractAttitudeProfile

Represents an angular velocities guidance profile, calculated with Fourier series

Since:

1.3

Version:

$Id$

Author:

Rami Houdroge

See Also:

Serialized Form

Concurrency :

conditionally thread-safe

Concurrency comment :

thread-safe if the Frame attribute is thread-safe.

Constructor Summary

Constructors

Constructor and Description
AngularVelocitiesHarmonicProfile(AbsoluteDate origin, Rotation initialRotation, Frame frame, FourierSeries xAngle, FourierSeries yAngle, FourierSeries zAngle, AbsoluteDateInterval timeInterval, KinematicsToolkit.IntegrationType integType, double integStep) Create a harmonic, angular velocities guidance profile.
AngularVelocitiesHarmonicProfile(AbsoluteDate origin, Rotation initialRotation, Frame frame, FourierSeries xAngle, FourierSeries yAngle, FourierSeries zAngle, AbsoluteDateInterval timeInterval, KinematicsToolkit.IntegrationType integType, double integStep, String nature) Create a harmonic, angular velocities guidance profile.

Method Summary

Modifier and Type	Method and Description
double[]	getAngularFrequencies()
Attitude	getAttitude(PVCoordinatesProvider pvProv, AbsoluteDate userDate, Frame frame) Compute the attitude corresponding to an orbital state.
double[]	getConstants()
double[][]	getCosArrays()
Vector3D	getRotationAcceleration(AbsoluteDate dateIn) Get the rotation acceleration from the vector3D at a given date.
double[][]	getSinArrays()
void	setSpinDerivativesComputation(boolean computeSpinDerivatives) Method to activate spin derivative computation.
AngularVelocitiesHarmonicProfile	truncateTimeInterval(AbsoluteDateInterval newInterval) Truncate the validity interval of the profile

Methods inherited from class fr.cnes.sirius.patrius.attitudes.profiles.AbstractAttitudeProfile

checkDate, getAttitude, getNature, getTimeInterval

Methods inherited from class java.lang.Object

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

Constructor Detail

AngularVelocitiesHarmonicProfile

public AngularVelocitiesHarmonicProfile(AbsoluteDate origin,
                                        Rotation initialRotation,
                                        Frame frame,
                                        FourierSeries xAngle,
                                        FourierSeries yAngle,
                                        FourierSeries zAngle,
                                        AbsoluteDateInterval timeInterval,
                                        KinematicsToolkit.IntegrationType integType,
                                        double integStep)

Create a harmonic, angular velocities guidance profile.

Parameters:

origin - origin of date

initialRotation - rotation at origin

frame - frame where initialRotation and xAngle, yAngle and zAngle are expressed

xAngle - x angular velocity Fourier decomposition

yAngle - y angular velocity Fourier decomposition

zAngle - z angular velocity Fourier decomposition

timeInterval - interval of validity of the guidance profile

integType - integration type (see KinematicsToolkit.IntegrationType)

integStep - integration step

AngularVelocitiesHarmonicProfile

public AngularVelocitiesHarmonicProfile(AbsoluteDate origin,
                                        Rotation initialRotation,
                                        Frame frame,
                                        FourierSeries xAngle,
                                        FourierSeries yAngle,
                                        FourierSeries zAngle,
                                        AbsoluteDateInterval timeInterval,
                                        KinematicsToolkit.IntegrationType integType,
                                        double integStep,
                                        String nature)

Create a harmonic, angular velocities guidance profile.

Parameters:

origin - origin of date

initialRotation - rotation at origin

frame - frame where initialRotation and xAngle, yAngle and zAngle are expressed

xAngle - x angular velocity Fourier decomposition

yAngle - y angular velocity Fourier decomposition

zAngle - z angular velocity Fourier decomposition

timeInterval - interval of validity of the guidance profile

integType - integration type (see KinematicsToolkit.IntegrationType)

integStep - integration step

nature - Nature

Method Detail

getAngularFrequencies

public double[] getAngularFrequencies()

Returns:

the angular frequencies of the three Fourier series representing x, y and z.

getConstants

public double[] getConstants()

Returns:

the a0 coefficients of the three Fourier series representing x, y and z.

getCosArrays

public double[][] getCosArrays()

Returns:

the a coefficients of the three Fourier series representing x, y and z.

getSinArrays

public double[][] getSinArrays()

Returns:

the b coefficients of the three Fourier series representing x, y and z.

getAttitude

public Attitude getAttitude(PVCoordinatesProvider pvProv,
                            AbsoluteDate userDate,
                            Frame frame)
                     throws PatriusException

Compute the attitude corresponding to an orbital state.

Parameters:

pvProv - local position-velocity provider around current date

userDate - current date

frame - reference frame from which attitude is computed

Returns:

attitude attitude on the specified date and position-velocity state

Throws:

PatriusException - if attitude cannot be computed

getRotationAcceleration

public Vector3D getRotationAcceleration(AbsoluteDate dateIn)
                                 throws PatriusException

Get the rotation acceleration from the vector3D at a given date.

Parameters:

dateIn - the date

Returns:

the rotation acceleration at a given date

Throws:

PatriusException - thrown if date is not in interval

setSpinDerivativesComputation

public void setSpinDerivativesComputation(boolean computeSpinDerivatives)
                                   throws PatriusException

Method to activate spin derivative computation.

Parameters:

computeSpinDerivatives - true if spin derivatives should be computed

Throws:

PatriusException - if spin derivatives can not be computed

truncateTimeInterval

public AngularVelocitiesHarmonicProfile truncateTimeInterval(AbsoluteDateInterval newInterval)
                                                      throws PatriusException

Truncate the validity interval of the profile

Parameters:

newInterval - the new time interval

Returns:

the current profile re-computed with the new time interval

Throws:

PatriusException - if the new time interval is not included in the current time interval