franka_model.h

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/*
 *
 *  Created on: 24 feb 2019
 *     Authors: Oliva Alexander, Gaz Claudio, Cognetti Marco
 *
 *  C. Gaz, M. Cognetti, A. Oliva, P. Robuffo Giordano, A. De Luca, 'Dynamic
 *  Identification of the Franka Emika Panda Robot With Retrieval of Feasible
 *  Parameters Using Penalty-Based Optimization'. IEEE RA-L, 2019.
 *
 */
 
#ifndef franka_model_h
#define franka_model_h
 
#include <visp3/core/vpConfig.h>
#include <visp3/core/vpColVector.h>
#include <visp3/core/vpMatrix.h>
 
namespace franka_model
{
  const unsigned int njoints = 7;
 
  /*
   * In order to speed up the code execution, we pre-compute the constant part
   * of the friction model of each joint i (second term of the right member of
   * the equation).
   *
   * tau_f(i) = FI_1(i)/(1+exp(-FI_2(i)*(dq(i)+FI_3(i)))) -
   *                                           FI_1(i)/(1+exp(-FI_2(i)*FI_3(i)))
   *
   * For further information refer to our paper and relative Supplementary
   * Material:
   *      C. Gaz, M. Cognetti, A. Oliva, P. Robuffo Giordano, A. De Luca,
   * 'Dynamic Identification of the Franka Emika Panda Robot With Retrieval of
   *   Feasible Parameters Using Penalty-Based Optimization'. IEEE RA-L, 2019.
   */
 
  const double  FI_11 = 0.54615;
  const double  FI_12 = 0.87224;
  const double  FI_13 = 0.64068;
  const double  FI_14 = 1.2794;
  const double  FI_15 = 0.83904;
  const double  FI_16 = 0.30301;
  const double  FI_17 = 0.56489;
 
  const double  FI_21 = 5.1181;
  const double  FI_22 = 9.0657;
  const double  FI_23 = 10.136;
  const double  FI_24 = 5.5903;
  const double  FI_25 = 8.3469;
  const double  FI_26 = 17.133;
  const double  FI_27 = 10.336;
 
  const double  FI_31 = 0.039533;
  const double  FI_32 = 0.025882;
  const double  FI_33 = -0.04607;
  const double  FI_34 = 0.036194;
  const double  FI_35 = 0.026226;
  const double  FI_36 = -0.021047;
  const double  FI_37 = 0.0035526;
 
  const double TAU_F_CONST_1 = FI_11/(1+exp(-FI_21*FI_31));
  const double TAU_F_CONST_2 = FI_12/(1+exp(-FI_22*FI_32));
  const double TAU_F_CONST_3 = FI_13/(1+exp(-FI_23*FI_33));
  const double TAU_F_CONST_4 = FI_14/(1+exp(-FI_24*FI_34));
  const double TAU_F_CONST_5 = FI_15/(1+exp(-FI_25*FI_35));
  const double TAU_F_CONST_6 = FI_16/(1+exp(-FI_26*FI_36));
  const double TAU_F_CONST_7 = FI_17/(1+exp(-FI_27*FI_37));
 
  vpMatrix massMatrix(const vpColVector &q, const double mL = 0,
                              const vpHomogeneousMatrix &flMcom = vpHomogeneousMatrix(),
                                          const vpMatrix &I_L = vpMatrix(3,3));
 
  vpMatrix coriolisMatrix(const vpColVector &q,const vpColVector &dq,
                                  const double mL = 0,
                                                  const vpHomogeneousMatrix &flMcom = vpHomogeneousMatrix(),
                                                  const vpMatrix &I_L  = vpMatrix(3,3));
 
  vpColVector gravityVector(const vpColVector &q, const double mL = 0 ,
                                    const vpHomogeneousMatrix &flMcom = vpHomogeneousMatrix(),
                                                        const vpColVector &g0 = vpColVector({0.0,0.0,-9.80665}));
 
  vpColVector friction(const vpColVector &dq);
}
 
#endif /* frank_model_h */