fr.cnes.sirius.patrius.attitudes

Class IsisNumericalSpinBiasSlew

java.lang.Object

fr.cnes.sirius.patrius.attitudes.AbstractSlew

fr.cnes.sirius.patrius.attitudes.AbstractIsisSpinBiasSlew

fr.cnes.sirius.patrius.attitudes.IsisNumericalSpinBiasSlew

All Implemented Interfaces:

AttitudeLeg, AttitudeProvider, Slew, Serializable

public class IsisNumericalSpinBiasSlew
extends AbstractIsisSpinBiasSlew

ISIS spin bias slew (in GCRF): slew with trapezoidal angular velocity profile.

Slew is computed by numerical integration.

Since:

3.3

Version:

$Id: IsisNumericalSpinBiasSlew.java 17582 2017-05-10 12:58:16Z bignon $

Author:

Emmanuel Bignon

See Also:

Serialized Form

Concurrency :

not thread safe

Nested Class Summary

Nested classes/interfaces inherited from class fr.cnes.sirius.patrius.attitudes.AbstractIsisSpinBiasSlew

AbstractIsisSpinBiasSlew.TypeOfDate

Field Summary

Fields inherited from class fr.cnes.sirius.patrius.attitudes.AbstractIsisSpinBiasSlew

accelDuration, accelMax, decelDuration, decelMax, dtSCAO, durationWoTranq, ephem, initialOrFinalDate, refFrame, slewAngle, slewAxis, spinDerivativesComputation, typeOfDate

Fields inherited from class fr.cnes.sirius.patrius.attitudes.AbstractSlew

computed, currentProvider, fLaw, iLaw, intervalOfValidity

Constructor Summary

Constructors

Constructor and Description
IsisNumericalSpinBiasSlew(AttitudeProvider initialLawIn, AttitudeProvider finalLawIn, AbsoluteDate initialOrFinalDateIn, AbstractIsisSpinBiasSlew.TypeOfDate typeOfDate, double dtSCAOIn, double thetaMaxAllowedIn, double durationMaxIn, double dtConvergenceThresholdIn, double[][] inertiaMatrixIn, double rwTorqueAllocAccelIn, double rwTorqueAllocDecelIn, double rwDeltaMomentumAllocIn, double[][] rwMatrixIn, double tranquillisationTimeIn) Constructor with default maximum number of iterations allowed for slew duration computation's convergence.
IsisNumericalSpinBiasSlew(AttitudeProvider initialLawIn, AttitudeProvider finalLawIn, AbsoluteDate initialOrFinalDateIn, AbstractIsisSpinBiasSlew.TypeOfDate typeOfDate, double dtSCAOIn, double thetaMaxAllowedIn, double durationMaxIn, double dtConvergenceThresholdIn, double[][] inertiaMatrixIn, double rwTorqueAllocAccelIn, double rwTorqueAllocDecelIn, double rwDeltaMomentumAllocIn, double[][] rwMatrixIn, double tranquillisationTimeIn, int maxIterationsNumberIn) Constructor.

Method Summary

Modifier and Type	Method and Description
void	compute(PVCoordinatesProvider pvProv) Compute the slew corresponding to an orbital state.

Methods inherited from class fr.cnes.sirius.patrius.attitudes.AbstractIsisSpinBiasSlew

computeDuration, getAttitude, getEphemeris, setSpinDerivativesComputation

Methods inherited from class fr.cnes.sirius.patrius.attitudes.AbstractSlew

getAttitude, getAttitude, getDuration, getTimeInterval

Methods inherited from class java.lang.Object

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

Constructor Detail

IsisNumericalSpinBiasSlew

public IsisNumericalSpinBiasSlew(AttitudeProvider initialLawIn,
                                 AttitudeProvider finalLawIn,
                                 AbsoluteDate initialOrFinalDateIn,
                                 AbstractIsisSpinBiasSlew.TypeOfDate typeOfDate,
                                 double dtSCAOIn,
                                 double thetaMaxAllowedIn,
                                 double durationMaxIn,
                                 double dtConvergenceThresholdIn,
                                 double[][] inertiaMatrixIn,
                                 double rwTorqueAllocAccelIn,
                                 double rwTorqueAllocDecelIn,
                                 double rwDeltaMomentumAllocIn,
                                 double[][] rwMatrixIn,
                                 double tranquillisationTimeIn)

Constructor with default maximum number of iterations allowed for slew duration computation's convergence.

Parameters:

initialLawIn - attitudeProvider representing the attitude law before the slew

finalLawIn - attitudeProvider representing the attitude law after the slew

initialOrFinalDateIn - initial or final date of the slew (choice given by TypeOfDate argument)

typeOfDate - defines type of provided date AbstractIsisSpinBiasSlew.TypeOfDate (initial date or final date)

dtSCAOIn - time step (s)

thetaMaxAllowedIn - maximum slew angular amplitude allowed (rad)

durationMaxIn - maximum duration expected for the slew, including the tranquilisation phase (s)

dtConvergenceThresholdIn - convergence threshold for the iterative computation of the slew duration (s)

inertiaMatrixIn - satellite inertia matrix in satellite reference frame (kg.m^2)

rwTorqueAllocAccelIn - torque allocation for each RW during the acceleration phase (N.m)

rwTorqueAllocDecelIn - torque allocation for each RW during the deceleration phase (assumed > 0) (N.m)

rwDeltaMomentumAllocIn - angular momentum allocation for each RW during the manoeuvre (N.m.s)

rwMatrixIn - cosine directors matrix of the reaction wheels in the satellite reference frame. Matrix 3xN_RW with N_RW wheels (Reaction wheels spin axes written in column in the satellite reference frame).

tranquillisationTimeIn - tranquilisation time after the end of the slew (s)

IsisNumericalSpinBiasSlew

public IsisNumericalSpinBiasSlew(AttitudeProvider initialLawIn,
                                 AttitudeProvider finalLawIn,
                                 AbsoluteDate initialOrFinalDateIn,
                                 AbstractIsisSpinBiasSlew.TypeOfDate typeOfDate,
                                 double dtSCAOIn,
                                 double thetaMaxAllowedIn,
                                 double durationMaxIn,
                                 double dtConvergenceThresholdIn,
                                 double[][] inertiaMatrixIn,
                                 double rwTorqueAllocAccelIn,
                                 double rwTorqueAllocDecelIn,
                                 double rwDeltaMomentumAllocIn,
                                 double[][] rwMatrixIn,
                                 double tranquillisationTimeIn,
                                 int maxIterationsNumberIn)

Constructor.

Parameters:

initialLawIn - attitudeProvider representing the attitude law before the slew

finalLawIn - attitudeProvider representing the attitude law after the slew

initialOrFinalDateIn - initial or final date of the slew (choice given by TypeOfDate argument)

typeOfDate - defines type of provided date AbstractIsisSpinBiasSlew.TypeOfDate (initial date or final date)

dtSCAOIn - time step (s)

thetaMaxAllowedIn - maximum slew angular amplitude allowed (rad)

durationMaxIn - maximum duration expected for the slew, including the tranquilisation phase (s)

dtConvergenceThresholdIn - convergence threshold for the iterative computation of the slew duration (s)

inertiaMatrixIn - satellite inertia matrix in satellite reference frame (kg.m^2)

rwTorqueAllocAccelIn - torque allocation for each RW during the acceleration phase (N.m)

rwTorqueAllocDecelIn - torque allocation for each RW during the deceleration phase (assumed > 0) (N.m)

rwDeltaMomentumAllocIn - angular momentum allocation for each RW during the manoeuvre (N.m.s)

rwMatrixIn - cosine directors matrix of the reaction wheels in the satellite reference frame. Matrix 3xN_RW with N_RW wheels (Reaction wheels spin axes written in column in the satellite reference frame).

tranquillisationTimeIn - tranquilisation time after the end of the slew (s)

maxIterationsNumberIn - maximum number of iterations allowed for slew duration computation's convergence

Method Detail

compute

public void compute(PVCoordinatesProvider pvProv)
             throws PatriusException

Compute the slew corresponding to an orbital state.

Parameters:

pvProv - : local position-velocity provider around current date

Throws:

PatriusException - orekit exception