SQP.H

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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
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Class
    Foam::SQP
 
Description
    The quasi-Newton SQP formula for constrained optimisation
 
SourceFiles
    SQP.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef SQP_H
#define SQP_H
 
#include "quasiNewton.H"
#include "SQPBase.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                             Class SQP Declaration
\*---------------------------------------------------------------------------*/
 
class SQP
:
    public quasiNewton,
    public SQPBase
{
protected:
 
    // Protected data
 
        //- Curvature threshold
        scalar dumpingThreshold_;
 
 
private:
 
    // Private Member Functions
 
        //- No copy construct
        SQP(const SQP&) = delete;
 
        //- No copy assignment
        void operator=(const SQP&) = delete;
 
        //- Update the Hessian matrix
        virtual void updateHessian();
 
        //- Compute new lamdas and update correction
        virtual void update();
 
        //- Store old fields needed for the next iter
        void storeOldFields();
 
        //- Get the part the merit function that depends on the constraints
        virtual scalar meritFunctionConstraintPart() const;
 
 
public:
 
    //- Runtime type information
    TypeName("SQP");
 
 
    // Constructors
 
        //- Construct from components
        SQP
        (
            const fvMesh& mesh,
            const dictionary& dict,
            autoPtr<designVariables>& designVars,
            const label nConstraints,
            const word& type
        );
 
 
    //- Destructor
    virtual ~SQP() = default;
 
 
    // Member Functions
 
        //- Compute design variables correction
        void computeCorrection();
 
        //- Compute merit function. Could be different than the objective
        //- in the presence of constraints
        virtual scalar computeMeritFunction();
 
        //- Derivative of the merit function. Could be different than the
        //- objective derivative in the presence of constraints
        virtual scalar meritFunctionDirectionalDerivative();
 
        //- Write useful quantities to files
        virtual bool writeData(Ostream& os) const;
 
        //- Write merit function information
        virtual bool writeAuxiliaryData();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //