/****************************************************************************
*
* Copyright (C) 2012 PX4 Development Team. All rights reserved.
* Author: @author Tobias Naegeli <naegelit@student.ethz.ch>
* @author Lorenz Meier <lm@inf.ethz.ch>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file multirotor_rate_control.c
* Implementation of rate controller
*/
#include "multirotor_rate_control.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <float.h>
#include <math.h>
#include <systemlib/pid/pid.h>
#include <systemlib/param/param.h>
#include <arch/board/up_hrt.h>
// PARAM_DEFINE_FLOAT(MC_YAWRATE_P, 0.08f); /* same on Flamewheel */
// PARAM_DEFINE_FLOAT(MC_YAWRATE_I, 0.02f);
// PARAM_DEFINE_FLOAT(MC_YAWRATE_AWU, 0.02f);
// PARAM_DEFINE_FLOAT(MC_YAWRATE_LIM, 0.1f);
PARAM_DEFINE_FLOAT(MC_ATTRATE_P, 0.2f); /* 0.15 F405 Flamewheel */
PARAM_DEFINE_FLOAT(MC_ATTRATE_D, 0.0f);
//PARAM_DEFINE_FLOAT(MC_ATTRATE_I, 0.0f);
//PARAM_DEFINE_FLOAT(MC_ATTRATE_AWU, 0.05f);
PARAM_DEFINE_FLOAT(MC_ATTRATE_LIM, 8.0f); /**< roughly < 500 deg/s limit */
struct mc_rate_control_params {
float yawrate_p;
float yawrate_d;
float yawrate_i;
float yawrate_awu;
float yawrate_lim;
float attrate_p;
float attrate_d;
float attrate_i;
float attrate_awu;
float attrate_lim;
float rate_lim;
};
struct mc_rate_control_param_handles {
param_t yawrate_p;
param_t yawrate_i;
param_t yawrate_d;
param_t yawrate_awu;
param_t yawrate_lim;
param_t attrate_p;
param_t attrate_i;
param_t attrate_d;
param_t attrate_awu;
param_t attrate_lim;
};
/**
* Initialize all parameter handles and values
*
*/
static int parameters_init(struct mc_rate_control_param_handles *h);
/**
* Update all parameters
*
*/
static int parameters_update(const struct mc_rate_control_param_handles *h, struct mc_rate_control_params *p);
static int parameters_init(struct mc_rate_control_param_handles *h)
{
/* PID parameters */
h->yawrate_p = param_find("MC_YAWRATE_P");
h->yawrate_i = param_find("MC_YAWRATE_I");
h->yawrate_d = param_find("MC_YAWRATE_D");
h->yawrate_awu = param_find("MC_YAWRATE_AWU");
h->yawrate_lim = param_find("MC_YAWRATE_LIM");
h->attrate_p = param_find("MC_ATTRATE_P");
h->attrate_i = param_find("MC_ATTRATE_I");
h->attrate_d = param_find("MC_ATTRATE_D");
h->attrate_awu = param_find("MC_ATTRATE_AWU");
h->attrate_lim = param_find("MC_ATTRATE_LIM");
return OK;
}
static int parameters_update(const struct mc_rate_control_param_handles *h, struct mc_rate_control_params *p)
{
param_get(h->yawrate_p, &(p->yawrate_p));
param_get(h->yawrate_i, &(p->yawrate_i));
param_get(h->yawrate_d, &(p->yawrate_d));
param_get(h->yawrate_awu, &(p->yawrate_awu));
param_get(h->yawrate_lim, &(p->yawrate_lim));
param_get(h->attrate_p, &(p->attrate_p));
param_get(h->attrate_i, &(p->attrate_i));
param_get(h->attrate_d, &(p->attrate_d));
param_get(h->attrate_awu, &(p->attrate_awu));
param_get(h->attrate_lim, &(p->attrate_lim));
return OK;
}
void multirotor_control_rates(const struct vehicle_rates_setpoint_s *rate_sp,
const float rates[], struct actuator_controls_s *actuators)
{
static uint64_t last_run = 0;
const float deltaT = (hrt_absolute_time() - last_run) / 1000000.0f;
last_run = hrt_absolute_time();
static int motor_skip_counter = 0;
static struct mc_rate_control_params p;
static struct mc_rate_control_param_handles h;
static bool initialized = false;
/* load new parameters with lower rate */
if (motor_skip_counter % 500 == 0) {
/* update parameters from storage */
parameters_update(&h, &p);
}
/* calculate current control outputs */
float setpointXrate;
float setpointYrate;
float setpointZrate;
float setRollRate=rate_sp->roll;
float setPitchRate=rate_sp->pitch;
float setYawRate=rate_sp->yaw;
//x-axis
setpointXrate=p.attrate_p*(setRollRate-rates[0]);
//Y-axis
setpointYrate=p.attrate_p*(setPitchRate-rates[1]);
//Z-axis
setpointZrate=p.yawrate_p*(setYawRate-rates[2]);
actuators->control[0] = setpointXrate; //roll
actuators->control[1] = setpointYrate; //pitch
actuators->control[2] = setpointZrate; //yaw
actuators->control[3] = rate_sp->thrust;
motor_skip_counter++;
}
