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/****************************************************************************
*
* Copyright (C) 2012 PX4 Development Team. All rights reserved.
* Author: Tobias Naegeli <naegelit@student.ethz.ch>
* 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 attitude_estimator_ekf_params.c
*
* Parameters for EKF filter
*/
#include "attitude_estimator_ekf_params.h"
/* Extended Kalman Filter covariances */
/* gyro process noise */
PARAM_DEFINE_FLOAT(EKF_ATT_V3_Q0, 1e-4f);
PARAM_DEFINE_FLOAT(EKF_ATT_V3_Q1, 0.08f);
PARAM_DEFINE_FLOAT(EKF_ATT_V3_Q2, 0.009f);
/* gyro offsets process noise */
PARAM_DEFINE_FLOAT(EKF_ATT_V3_Q3, 0.005f);
PARAM_DEFINE_FLOAT(EKF_ATT_V3_Q4, 0.0f);
/* gyro measurement noise */
PARAM_DEFINE_FLOAT(EKF_ATT_V4_R0, 0.0008f);
/* accel measurement noise */
PARAM_DEFINE_FLOAT(EKF_ATT_V4_R1, 10000.0f);
/* mag measurement noise */
PARAM_DEFINE_FLOAT(EKF_ATT_V4_R2, 100.0f);
/* offset estimation - UNUSED */
PARAM_DEFINE_FLOAT(EKF_ATT_V4_R3, 0.0f);
/* offsets in roll, pitch and yaw of sensor plane and body */
PARAM_DEFINE_FLOAT(ATT_ROLL_OFF3, 0.0f);
PARAM_DEFINE_FLOAT(ATT_PITCH_OFF3, 0.0f);
PARAM_DEFINE_FLOAT(ATT_YAW_OFF3, 0.0f);
int parameters_init(struct attitude_estimator_ekf_param_handles *h)
{
/* PID parameters */
h->q0 = param_find("EKF_ATT_V3_Q0");
h->q1 = param_find("EKF_ATT_V3_Q1");
h->q2 = param_find("EKF_ATT_V3_Q2");
h->q3 = param_find("EKF_ATT_V3_Q3");
h->q4 = param_find("EKF_ATT_V3_Q4");
h->r0 = param_find("EKF_ATT_V4_R0");
h->r1 = param_find("EKF_ATT_V4_R1");
h->r2 = param_find("EKF_ATT_V4_R2");
h->r3 = param_find("EKF_ATT_V4_R3");
h->roll_off = param_find("ATT_ROLL_OFF3");
h->pitch_off = param_find("ATT_PITCH_OFF3");
h->yaw_off = param_find("ATT_YAW_OFF3");
return OK;
}
int parameters_update(const struct attitude_estimator_ekf_param_handles *h, struct attitude_estimator_ekf_params *p)
{
param_get(h->q0, &(p->q[0]));
param_get(h->q1, &(p->q[1]));
param_get(h->q2, &(p->q[2]));
param_get(h->q3, &(p->q[3]));
param_get(h->q4, &(p->q[4]));
param_get(h->r0, &(p->r[0]));
param_get(h->r1, &(p->r[1]));
param_get(h->r2, &(p->r[2]));
param_get(h->r3, &(p->r[3]));
param_get(h->roll_off, &(p->roll_off));
param_get(h->pitch_off, &(p->pitch_off));
param_get(h->yaw_off, &(p->yaw_off));
return OK;
}
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