fr.cnes.sirius.patrius.guidance
Class AngularVelocitiesHarmonicProfile

java.lang.Object
  fr.cnes.sirius.patrius.guidance.GuidanceProfile
      fr.cnes.sirius.patrius.guidance.AngularVelocitiesHarmonicProfile

All Implemented Interfaces:

Serializable, AttitudeLeg, AttitudeProvider

public final class AngularVelocitiesHarmonicProfile
extends GuidanceProfile

Represents an angular velocities guidance profile, calculated with Fourier series

Since:

1.3

Version:

$Id: AngularVelocitiesHarmonicProfile.java 15520 2016-03-07 13:25:06Z bignon $

Author:

Rami Houdroge

See Also:

Serialized Form

Concurrency :

conditionally thread-safe

Concurrency comment :

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

Constructor Summary

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.

Method Summary

double[]	getAngularFrequencies()
Attitude	getAttitude(PVCoordinatesProvider pvProv, AbsoluteDate userDate, Frame frame) Compute the attitude corresponding to an orbital state.
double[]	getConstants()
double[][]	getCosArrays()
double[][]	getSinArrays()
void	setSpinDerivativesComputation(boolean computeSpinDerivatives) Method to activate spin derivative computation.

Methods inherited from class fr.cnes.sirius.patrius.guidance.GuidanceProfile

checkDate, getAttitude, 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

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 OrekitException

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:

OrekitException - if attitude cannot be computed

setSpinDerivativesComputation

public void setSpinDerivativesComputation(boolean computeSpinDerivatives)
                                   throws OrekitException

Method to activate spin derivative computation.

Parameters:

computeSpinDerivatives - true if spin derivatives should be computed

Throws:

OrekitException - if spin derivatives can not be computed