root/applications/pmsm/simulator_zdenek/ekf_example/ekf_obj.h @ 1174

/*!
  \file
  \brief Bayesian Filtering for linear Gaussian models (Kalman Filter) and extensions
  \author Vaclav Smidl.

  -----------------------------------
  BDM++ - C++ library for Bayesian Decision Making under Uncertainty

  Using IT++ for numerical operations
  -----------------------------------
*/

#ifndef EKFfix_H
#define EKFfix_H


#include <estim/kalman.h>
#include "fixed.h"
#include "matrix.h"
#include "matrix_vs.h"
#include "reference.h"
#include "parametry_motoru.h"

using namespace bdm;

double minQ(double Q);

void mat_to_int(const imat &M, int *I);
void vec_to_int(const ivec &v, int *I);

/*!
\brief Extended Kalman Filter with full matrices in fixed point arithmetic

An approximation of the exact Bayesian filter with Gaussian noices and non-linear evolutions of their mean.
*/
class EKFfixed : public BM {
public:
void init_ekf(double Tv);
void ekf(double ux, double uy, double isxd, double isyd);

/* Declaration of local functions */
void prediction(int *ux);
void correction(void);
void update_psi(void);

/* Constants - definovat jako konstanty ?? ?kde je vyhodnejsi aby v pameti byli?*/
 int Q[16]; /* matrix [4,4] */
 int R[4]; /* matrix [2,2] */

 int x_est[4];
 int x_pred[4];
 int P_pred[16]; /* matrix [4,4] */
 int P_est[16]; /* matrix [4,4] */
 int Y_mes[2];
 int ukalm[2];
 int Kalm[8]; /* matrix [5,2] */

 int PSI[16]; /* matrix [4,4] */

 int temp15a[16];

 int cA, cB, cC, cG, cH;  // cD, cE, cF, cI ... nepouzivane

 long temp30a[4]; /* matrix [2,2] - temporary matrix for inversion */
 enorm<fsqmat> E;
 mat Ry;
  
public:
        //! Default constructor
        EKFfixed ():BM(),E(),Ry(2,2){
                int i;
                for(i=0;i<16;i++){Q[i]=0;}
                for(i=0;i<4;i++){R[i]=0;}

                for(i=0;i<4;i++){x_est[i]=0;}
                for(i=0;i<4;i++){x_pred[i]=0;}
                for(i=0;i<16;i++){P_pred[i]=0;}
                for(i=0;i<16;i++){P_est[i]=0;}
                P_est[0]=0x7FFF;
                P_est[5]=0x7FFF;
                P_est[10]=0x7FFF;
                P_est[15]=0x7FFF;
                for(i=0;i<2;i++){Y_mes[i]=0;}
                for(i=0;i<2;i++){ukalm[i]=0;}
                for(i=0;i<8;i++){Kalm[i]=0;}

                for(i=0;i<16;i++){PSI[i]=0;}

                set_dim(4);
                E._mu()=zeros(4);
                E._R()=zeros(4,4);
                init_ekf(0.000125);
        };
        //! Here dt = [yt;ut] of appropriate dimensions
        void bayes ( const vec &yt, const vec &ut );
        //!dummy!
        const epdf& posterior() const {return E;};
        
};

UIREGISTER(EKFfixed);

//! EKF for comparison of EKF_UD with its fixed-point implementation
class EKF_UDfix : public BM {
        protected:
                //! logger
                LOG_LEVEL(EKF_UDfix,logU, logG);
                //! Internal Model f(x,u)
                shared_ptr<diffbifn> pfxu;
                
                //! Observation Model h(x,u)
                shared_ptr<diffbifn> phxu;
                
                //! U part
                mat U;
                //! D part
                vec D;
                
                int Uf[25];
                int Df[5];
                int Dfold[5];
                
                mat A;
                mat C;
                mat Q;
                vec R;
                
                int PSI[25];
                int PSIU[25];
                int Gf[25];

                enorm<ldmat> est;
                
                
        public:
                
                //! copy constructor duplicated 
                EKF_UDfix* _copy() const {
                        return new EKF_UDfix(*this);
                }
                
                const enorm<ldmat>& posterior()const{return est;};
                
                enorm<ldmat>& prior() {
                        return const_cast<enorm<ldmat>&>(posterior());
                }
                
                EKF_UDfix(){}
                
                
                EKF_UDfix(const EKF_UDfix &E0): pfxu(E0.pfxu),phxu(E0.phxu), U(E0.U), D(E0.D){}
                
                //! Set nonlinear functions for mean values and covariance matrices.
                void set_parameters ( const shared_ptr<diffbifn> &pfxu, const shared_ptr<diffbifn> &phxu, const mat Q0, const vec R0 );
                
                //! Here dt = [yt;ut] of appropriate dimensions
                void bayes ( const vec &yt, const vec &cond = empty_vec );
                
                void log_register ( bdm::logger& L, const string& prefix ){
                        BM::log_register ( L, prefix );
                        
                        if ( log_level[logU] )
                                L.add_vector ( log_level, logU, RV ( dimension()*dimension() ), prefix );
                        if ( log_level[logG] )
                                L.add_vector ( log_level, logG, RV ( dimension()*dimension() ), prefix );
                        
                }
                /*! Create object from the following structure
                
                \code
                class = 'EKF_UD';
                OM = configuration of bdm::diffbifn;    % any offspring of diffbifn, bdm::diffbifn::from_setting
                IM = configuration of bdm::diffbifn;    % any offspring of diffbifn, bdm::diffbifn::from_setting
                dQ = [...];                             % vector containing diagonal of Q
                dR = [...];                             % vector containing diagonal of R
                --- optional fields ---
                mu0 = [...];                            % vector of statistics mu0
                dP0 = [...];                            % vector containing diagonal of P0
                -- or --
                P0 = [...];                             % full matrix P0
                --- inherited fields ---
                bdm::BM::from_setting
                \endcode
                If the optional fields are not given, they will be filled as follows:
                \code
                mu0 = [0,0,0,....];                     % empty statistics
                P0 = eye( dim );              
                \endcode
                */
                void from_setting ( const Setting &set );
                
                void validate() {};
                // TODO dodelat void to_setting( Setting &set ) const;
                
};
UIREGISTER(EKF_UDfix);


#endif // KF_H