Package org.orekit.control.indirect.adjoint

Class FieldCartesianAdjointDerivativesProvider<T extends CalculusFieldElement<T>>

java.lang.Object

org.orekit.control.indirect.adjoint.AbstractCartesianAdjointDerivativesProvider

org.orekit.control.indirect.adjoint.FieldCartesianAdjointDerivativesProvider<T>

All Implemented Interfaces:

FieldAdditionalDerivativesProvider<T>

public class FieldCartesianAdjointDerivativesProvider<T extends CalculusFieldElement<T>>
extends AbstractCartesianAdjointDerivativesProvider
implements FieldAdditionalDerivativesProvider<T>

Class defining the Field version of the adjoint dynamics for Cartesian coordinates, as defined in the Pontryagin Maximum Principle.

Since:

12.2

Author:

Romain Serra

See Also:

FieldAdditionalDerivativesProvider, FieldNumericalPropagator, CartesianAdjointDerivativesProvider

Constructor Summary

Constructors

Constructor	Description
FieldCartesianAdjointDerivativesProvider(CartesianCost cost, CartesianAdjointEquationTerm... adjointEquationTerms)	Constructor.

Method Summary

Modifier and Type	Method	Description
FieldCombinedDerivatives<T>	combinedDerivatives(FieldSpacecraftState<T> state)	Compute the derivatives related to the additional state (and optionally main state increments).
T	evaluateHamiltonian(FieldSpacecraftState<T> state)	Evaluate the Hamiltonian from Pontryagin's Maximum Principle.
void	init(FieldSpacecraftState<T> initialState, FieldAbsoluteDate<T> target)	Initialize the generator at the start of propagation.

Methods inherited from class org.orekit.control.indirect.adjoint.AbstractCartesianAdjointDerivativesProvider

getCost, getDimension, getName

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.integration.FieldAdditionalDerivativesProvider

getDimension, getName, yields

Constructor Detail

FieldCartesianAdjointDerivativesProvider

public FieldCartesianAdjointDerivativesProvider(CartesianCost cost,
                                                CartesianAdjointEquationTerm... adjointEquationTerms)

Constructor.

Parameters:

cost - cost function

adjointEquationTerms - terms contributing to the adjoint equations

Method Detail

init

public void init(FieldSpacecraftState<T> initialState,
                 FieldAbsoluteDate<T> target)

Initialize the generator at the start of propagation.

Specified by:

init in interface FieldAdditionalDerivativesProvider<T extends CalculusFieldElement<T>>

Parameters:

initialState - initial state information at the start of propagation

target - date of propagation

combinedDerivatives

public FieldCombinedDerivatives<T> combinedDerivatives(FieldSpacecraftState<T> state)

Compute the derivatives related to the additional state (and optionally main state increments).

Specified by:

combinedDerivatives in interface FieldAdditionalDerivativesProvider<T extends CalculusFieldElement<T>>

Parameters:

state - current state information: date, kinematics, attitude, and additional states this equations depend on (according to the yields method)

Returns:

computed combined derivatives, which may include some incremental coupling effect to add to main state derivatives

evaluateHamiltonian

public T evaluateHamiltonian(FieldSpacecraftState<T> state)

Evaluate the Hamiltonian from Pontryagin's Maximum Principle.

Parameters:

state - state assumed to hold the adjoint variables

Returns:

Hamiltonian