sih_params.c
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/****************************************************************************
*
* Copyright (c) 2019-2020 PX4 Development Team. All rights reserved.
*
* 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 sih_params.c
* Parameters for quadcopter X simulator in hardware.
*
* @author Romain Chiappinelli <romain.chiap@gmail.com>
* February 2019
*/
/**
* Vehicle mass
*
* This value can be measured by weighting the quad on a scale.
*
* @unit kg
* @min 0.0
* @decimal 2
* @increment 0.1
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_MASS, 1.0f);
/**
* Vehicle inertia about X axis
*
* The intertia is a 3 by 3 symmetric matrix.
* It represents the difficulty of the vehicle to modify its angular rate.
*
* @unit kg m^2
* @min 0.0
* @decimal 3
* @increment 0.005
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_IXX, 0.025f);
/**
* Vehicle inertia about Y axis
*
* The intertia is a 3 by 3 symmetric matrix.
* It represents the difficulty of the vehicle to modify its angular rate.
*
* @unit kg m^2
* @min 0.0
* @decimal 3
* @increment 0.005
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_IYY, 0.025f);
/**
* Vehicle inertia about Z axis
*
* The intertia is a 3 by 3 symmetric matrix.
* It represents the difficulty of the vehicle to modify its angular rate.
*
* @unit kg m^2
* @min 0.0
* @decimal 3
* @increment 0.005
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_IZZ, 0.030f);
/**
* Vehicle cross term inertia xy
*
* The intertia is a 3 by 3 symmetric matrix.
* This value can be set to 0 for a quad symmetric about its center of mass.
*
* @unit kg m^2
* @decimal 3
* @increment 0.005
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_IXY, 0.0f);
/**
* Vehicle cross term inertia xz
*
* The intertia is a 3 by 3 symmetric matrix.
* This value can be set to 0 for a quad symmetric about its center of mass.
*
* @unit kg m^2
* @decimal 3
* @increment 0.005
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_IXZ, 0.0f);
/**
* Vehicle cross term inertia yz
*
* The intertia is a 3 by 3 symmetric matrix.
* This value can be set to 0 for a quad symmetric about its center of mass.
*
* @unit kg m^2
* @decimal 3
* @increment 0.005
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_IYZ, 0.0f);
/**
* Max propeller thrust force
*
* This is the maximum force delivered by one propeller
* when the motor is running at full speed.
*
* This value is usually about 5 times the mass of the quadrotor.
*
* @unit N
* @min 0.0
* @decimal 2
* @increment 0.5
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_T_MAX, 5.0f);
/**
* Max propeller torque
*
* This is the maximum torque delivered by one propeller
* when the motor is running at full speed.
*
* This value is usually about few percent of the maximum thrust force.
*
* @unit Nm
* @min 0.0
* @decimal 3
* @increment 0.05
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_Q_MAX, 0.1f);
/**
* Roll arm length
*
* This is the arm length generating the rolling moment
*
* This value can be measured with a ruler.
* This corresponds to half the distance between the left and right motors.
*
* @unit m
* @min 0.0
* @decimal 2
* @increment 0.05
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_L_ROLL, 0.2f);
/**
* Pitch arm length
*
* This is the arm length generating the pitching moment
*
* This value can be measured with a ruler.
* This corresponds to half the distance between the front and rear motors.
*
* @unit m
* @min 0.0
* @decimal 2
* @increment 0.05
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_L_PITCH, 0.2f);
/**
* First order drag coefficient
*
* Physical coefficient representing the friction with air particules.
* The greater this value, the slower the quad will move.
*
* Drag force function of velocity: D=-KDV*V.
* The maximum freefall velocity can be computed as V=10*MASS/KDV [m/s]
*
* @unit N/(m/s)
* @min 0.0
* @decimal 2
* @increment 0.05
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_KDV, 1.0f);
/**
* First order angular damper coefficient
*
* Physical coefficient representing the friction with air particules during rotations.
* The greater this value, the slower the quad will rotate.
*
* Aerodynamic moment function of body rate: Ma=-KDW*W_B.
* This value can be set to 0 if unknown.
*
* @unit Nm/(rad/s)
* @min 0.0
* @decimal 3
* @increment 0.005
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_KDW, 0.025f);
/**
* Initial geodetic latitude
*
* This value represents the North-South location on Earth where the simulation begins.
* A value of 45 deg should be written 450000000.
*
* LAT0, LON0, H0, MU_X, MU_Y, and MU_Z should ideally be consistent among each others
* to represent a physical ground location on Earth.
*
* @unit deg*1e7
* @min -850000000
* @max 850000000
* @group Simulation In Hardware
*/
PARAM_DEFINE_INT32(SIH_LOC_LAT0, 454671160);
/**
* Initial geodetic longitude
*
* This value represents the East-West location on Earth where the simulation begins.
* A value of 45 deg should be written 450000000.
*
* LAT0, LON0, H0, MU_X, MU_Y, and MU_Z should ideally be consistent among each others
* to represent a physical ground location on Earth.
*
* @unit deg*1e7
* @min -1800000000
* @max 1800000000
* @group Simulation In Hardware
*/
PARAM_DEFINE_INT32(SIH_LOC_LON0, -737578370);
/**
* Initial AMSL ground altitude
*
* This value represents the Above Mean Sea Level (AMSL) altitude where the simulation begins.
*
* If using FlightGear as a visual animation,
* this value can be tweaked such that the vehicle lies on the ground at takeoff.
*
* LAT0, LON0, H0, MU_X, MU_Y, and MU_Z should ideally be consistent among each others
* to represent a physical ground location on Earth.
*
*
* @unit m
* @min -420.0
* @max 8848.0
* @decimal 2
* @increment 0.01
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_LOC_H0, 32.34f);
/**
* North magnetic field at the initial location
*
* This value represents the North magnetic field at the initial location.
*
* A magnetic field calculator can be found on the NOAA website
* Note, the values need to be converted from nano Tesla to Gauss
*
* LAT0, LON0, H0, MU_X, MU_Y, and MU_Z should ideally be consistent among each others
* to represent a physical ground location on Earth.
*
* @unit gauss
* @min -1.0
* @max 1.0
* @decimal 2
* @increment 0.001
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_LOC_MU_X, 0.179f);
/**
* East magnetic field at the initial location
*
* This value represents the East magnetic field at the initial location.
*
* A magnetic field calculator can be found on the NOAA website
* Note, the values need to be converted from nano Tesla to Gauss
*
* LAT0, LON0, H0, MU_X, MU_Y, and MU_Z should ideally be consistent among each others
* to represent a physical ground location on Earth.
*
* @unit gauss
* @min -1.0
* @max 1.0
* @decimal 2
* @increment 0.001
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_LOC_MU_Y, -0.045f);
/**
* Down magnetic field at the initial location
*
* This value represents the Down magnetic field at the initial location.
*
* A magnetic field calculator can be found on the NOAA website
* Note, the values need to be converted from nano Tesla to Gauss
*
* LAT0, LON0, H0, MU_X, MU_Y, and MU_Z should ideally be consistent among each others
* to represent a physical ground location on Earth.
*
* @unit gauss
* @min -1.0
* @max 1.0
* @decimal 2
* @increment 0.001
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_LOC_MU_Z, 0.504f);
/**
* Number of GPS satellites used
*
* @min 0
* @max 50
* @group Simulation In Hardware
*/
PARAM_DEFINE_INT32(SIH_GPS_USED, 10);
/**
* Barometer offset in meters
*
* Absolute value superior to 10000 will disable barometer
*
* @unit m
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_BARO_OFFSET, 0.0f);
/**
* magnetometer X offset in Gauss
*
* Absolute value superior to 10000 will disable magnetometer
*
* @unit gauss
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_MAG_OFFSET_X, 0.0f);
/**
* magnetometer Y offset in Gauss
*
* Absolute value superior to 10000 will disable magnetometer
*
* @unit gauss
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_MAG_OFFSET_Y, 0.0f);
/**
* magnetometer Z offset in Gauss
*
* Absolute value superior to 10000 will disable magnetometer
*
* @unit gauss
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_MAG_OFFSET_Z, 0.0f);
/**
* distance sensor minimun range
*
* @unit m
* @min 0.0
* @max 10.0
* @decimal 4
* @increment 0.01
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_DISTSNSR_MIN, 0.0f);
/**
* distance sensor maximun range
*
* @unit m
* @min 0.0
* @max 1000.0
* @decimal 4
* @increment 0.01
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_DISTSNSR_MAX, 100.0f);
/**
* if >= 0 the distance sensor measures will be overrided by this value
*
* Absolute value superior to 10000 will disable distance sensor
*
* @unit m
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_DISTSNSR_OVR, -1.0f);
/**
* thruster time constant tau
*
* the time taken for the thruster to step from 0 to 100% should be about 4 times tau
*
* @unit s
* @group Simulation In Hardware
*/
PARAM_DEFINE_FLOAT(SIH_T_TAU, 0.05f);