stabilization_indi.h

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/*
 * Copyright (C) Ewoud Smeur <ewoud_smeur@msn.com>
 * MAVLab Delft University of Technology
 *
 * This control algorithm is Incremental Nonlinear Dynamic Inversion (INDI)
 *
 * This is a simplified implementation of the (soon to be) publication in the
 * journal of Control Guidance and Dynamics: Adaptive Incremental Nonlinear
 * Dynamic Inversion for Attitude Control of Micro Aerial Vehicles
 *
 * This file is part of paparazzi.
 *
 * paparazzi 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 2, or (at your option)
 * any later version.
 *
 * paparazzi is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with paparazzi; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef STABILIZATION_INDI_H
#define STABILIZATION_INDI_H

#include "firmwares/rotorcraft/stabilization/stabilization_attitude_ref_quat_int.h"

extern struct Int32Quat   stab_att_sp_quat;  
extern struct Int32Eulers stab_att_sp_euler; 

struct ReferenceSystem {
  float err_p;
  float err_q;
  float err_r;
  float rate_p;
  float rate_q;
  float rate_r;
};

struct IndiFilter {
  struct FloatRates ddx;
  struct FloatRates dx;
  struct FloatRates x;

  float zeta;
  float omega;
  float omega_r;
  float omega2;
  float omega2_r;
};

struct IndiEstimation {
  struct IndiFilter u;
  struct IndiFilter rate;
  struct FloatRates g1;
  float g2;
  float mu;
};

struct IndiVariables {
  struct FloatRates angular_accel_ref;
  struct FloatRates du;
  struct FloatRates u_in;
  struct FloatRates u_act_dyn;

  struct IndiFilter u;
  struct IndiFilter rate;
  struct FloatRates g1;
  float g2;

  struct ReferenceSystem reference_acceleration;

  bool adaptive;             
  float max_rate;            
  float attitude_max_yaw_rate; 
  struct IndiEstimation est; 
};


extern struct IndiVariables indi;
extern void stabilization_indi_init(void);
extern void stabilization_indi_enter(void);
extern void stabilization_indi_set_failsafe_setpoint(void);
extern void stabilization_indi_set_rpy_setpoint_i(struct Int32Eulers *rpy);
extern void stabilization_indi_set_earth_cmd_i(struct Int32Vect2 *cmd, int32_t heading);
extern void stabilization_indi_run(bool enable_integrator, bool rate_control);
extern void stabilization_indi_read_rc(bool in_flight, bool in_carefree, bool coordinated_turn);

#endif /* STABILIZATION_INDI_H */