mc_pos_control: avoid global to local projections, work in global frame

This commit is contained in:
Anton Babushkin 2014-01-28 16:57:31 +01:00
parent 33daf84c00
commit 3601b80747
1 changed files with 131 additions and 124 deletions

View File

@ -63,8 +63,7 @@
#include <uORB/topics/vehicle_control_mode.h>
#include <uORB/topics/actuator_armed.h>
#include <uORB/topics/parameter_update.h>
#include <uORB/topics/vehicle_local_position.h>
#include <uORB/topics/vehicle_local_position_setpoint.h>
#include <uORB/topics/vehicle_global_position.h>
#include <uORB/topics/position_setpoint_triplet.h>
#include <uORB/topics/vehicle_global_velocity_setpoint.h>
#include <systemlib/param/param.h>
@ -109,6 +108,7 @@ private:
bool _task_should_exit; /**< if true, task should exit */
int _control_task; /**< task handle for task */
int _mavlink_fd; /**< mavlink fd */
int _att_sub; /**< vehicle attitude subscription */
int _att_sp_sub; /**< vehicle attitude setpoint */
@ -116,11 +116,11 @@ private:
int _params_sub; /**< notification of parameter updates */
int _manual_sub; /**< notification of manual control updates */
int _arming_sub; /**< arming status of outputs */
int _local_pos_sub; /**< vehicle local position */
int _global_pos_sub; /**< vehicle local position */
int _pos_sp_triplet_sub; /**< position setpoint triplet */
orb_advert_t _local_pos_sp_pub; /**< local position setpoint publication */
orb_advert_t _att_sp_pub; /**< attitude setpoint publication */
orb_advert_t _pos_sp_triplet_pub; /**< position setpoint triplet publication */
orb_advert_t _global_vel_sp_pub; /**< vehicle global velocity setpoint */
struct vehicle_attitude_s _att; /**< vehicle attitude */
@ -128,8 +128,7 @@ private:
struct manual_control_setpoint_s _manual; /**< r/c channel data */
struct vehicle_control_mode_s _control_mode; /**< vehicle control mode */
struct actuator_armed_s _arming; /**< actuator arming status */
struct vehicle_local_position_s _local_pos; /**< vehicle local position */
struct vehicle_local_position_setpoint_s _local_pos_sp; /**< vehicle local position */
struct vehicle_global_position_s _global_pos; /**< vehicle global position */
struct position_setpoint_triplet_s _pos_sp_triplet; /**< vehicle global position setpoint triplet */
struct vehicle_global_velocity_setpoint_s _global_vel_sp; /**< vehicle global velocity setpoint */
@ -177,9 +176,14 @@ private:
math::Vector<3> sp_offs_max;
} _params;
math::Vector<3> _pos;
double _lat_sp;
double _lon_sp;
float _alt_sp;
bool _reset_lat_lon_sp;
bool _reset_alt_sp;
math::Vector<3> _vel;
math::Vector<3> _pos_sp;
math::Vector<3> _vel_sp;
math::Vector<3> _vel_prev; /**< velocity on previous step */
@ -200,6 +204,16 @@ private:
static float scale_control(float ctl, float end, float dz);
/**
* Reset lat/lon to current position
*/
void reset_lat_lon_sp();
/**
* Reset altitude setpoint to current altitude
*/
void reset_alt_sp();
/**
* Shim for calling task_main from task_create.
*/
@ -227,6 +241,7 @@ MulticopterPositionControl::MulticopterPositionControl() :
_task_should_exit(false),
_control_task(-1),
_mavlink_fd(-1),
/* subscriptions */
_att_sub(-1),
@ -235,21 +250,27 @@ MulticopterPositionControl::MulticopterPositionControl() :
_params_sub(-1),
_manual_sub(-1),
_arming_sub(-1),
_local_pos_sub(-1),
_global_pos_sub(-1),
_pos_sp_triplet_sub(-1),
/* publications */
_local_pos_sp_pub(-1),
_att_sp_pub(-1),
_global_vel_sp_pub(-1)
_pos_sp_triplet_pub(-1),
_global_vel_sp_pub(-1),
_lat_sp(0.0),
_lon_sp(0.0),
_alt_sp(0.0f),
_reset_lat_lon_sp(true),
_reset_alt_sp(true)
{
memset(&_att, 0, sizeof(_att));
memset(&_att_sp, 0, sizeof(_att_sp));
memset(&_manual, 0, sizeof(_manual));
memset(&_control_mode, 0, sizeof(_control_mode));
memset(&_arming, 0, sizeof(_arming));
memset(&_local_pos, 0, sizeof(_local_pos));
memset(&_local_pos_sp, 0, sizeof(_local_pos_sp));
memset(&_global_pos, 0, sizeof(_global_pos));
memset(&_pos_sp_triplet, 0, sizeof(_pos_sp_triplet));
memset(&_global_vel_sp, 0, sizeof(_global_vel_sp));
@ -261,9 +282,7 @@ MulticopterPositionControl::MulticopterPositionControl() :
_params.vel_ff.zero();
_params.sp_offs_max.zero();
_pos.zero();
_vel.zero();
_pos_sp.zero();
_vel_sp.zero();
_vel_prev.zero();
@ -405,10 +424,10 @@ MulticopterPositionControl::poll_subscriptions()
if (updated)
orb_copy(ORB_ID(actuator_armed), _arming_sub, &_arming);
orb_check(_pos_sp_triplet_sub, &updated);
orb_check(_global_pos_sub, &updated);
if (updated)
orb_copy(ORB_ID(position_setpoint_triplet), _pos_sp_triplet_sub, &_pos_sp_triplet);
orb_copy(ORB_ID(vehicle_global_position), _global_pos_sub, &_global_pos);
}
float
@ -431,14 +450,34 @@ MulticopterPositionControl::task_main_trampoline(int argc, char *argv[])
pos_control::g_control->task_main();
}
void
MulticopterPositionControl::reset_lat_lon_sp()
{
if (_reset_lat_lon_sp) {
_reset_lat_lon_sp = false;
_lat_sp = _global_pos.lat;
_lon_sp = _global_pos.lon;
mavlink_log_info(_mavlink_fd, "[mpc] reset lat/lon sp: %.7f, %.7f", _lat_sp, _lon_sp);
}
}
void
MulticopterPositionControl::reset_alt_sp()
{
if (_reset_alt_sp) {
_reset_alt_sp = false;
_alt_sp = _global_pos.alt;
mavlink_log_info(_mavlink_fd, "[mpc] reset alt sp: %.2f", (double)_alt_sp);
}
}
void
MulticopterPositionControl::task_main()
{
warnx("started");
static int mavlink_fd;
mavlink_fd = open(MAVLINK_LOG_DEVICE, 0);
mavlink_log_info(mavlink_fd, "[mpc] started");
_mavlink_fd = open(MAVLINK_LOG_DEVICE, 0);
mavlink_log_info(_mavlink_fd, "[mpc] started");
/*
* do subscriptions
@ -449,7 +488,7 @@ MulticopterPositionControl::task_main()
_params_sub = orb_subscribe(ORB_ID(parameter_update));
_manual_sub = orb_subscribe(ORB_ID(manual_control_setpoint));
_arming_sub = orb_subscribe(ORB_ID(actuator_armed));
_local_pos_sub = orb_subscribe(ORB_ID(vehicle_local_position));
_global_pos_sub = orb_subscribe(ORB_ID(vehicle_global_position));
_pos_sp_triplet_sub = orb_subscribe(ORB_ID(position_setpoint_triplet));
parameters_update(true);
@ -460,8 +499,6 @@ MulticopterPositionControl::task_main()
/* get an initial update for all sensor and status data */
poll_subscriptions();
bool reset_sp_z = true;
bool reset_sp_xy = true;
bool reset_int_z = true;
bool reset_int_z_manual = false;
bool reset_int_xy = true;
@ -472,11 +509,6 @@ MulticopterPositionControl::task_main()
const float alt_ctl_dz = 0.2f;
const float pos_ctl_dz = 0.05f;
hrt_abstime ref_timestamp = 0;
int32_t ref_lat = 0.0f;
int32_t ref_lon = 0.0f;
float ref_alt = 0.0f;
math::Vector<3> sp_move_rate;
sp_move_rate.zero();
math::Vector<3> thrust_int;
@ -488,7 +520,7 @@ MulticopterPositionControl::task_main()
struct pollfd fds[1];
/* Setup of loop */
fds[0].fd = _local_pos_sub;
fds[0].fd = _global_pos_sub;
fds[0].events = POLLIN;
while (!_task_should_exit) {
@ -505,8 +537,6 @@ MulticopterPositionControl::task_main()
continue;
}
orb_copy(ORB_ID(vehicle_local_position), _local_pos_sub, &_local_pos);
poll_subscriptions();
parameters_update(false);
@ -516,8 +546,8 @@ MulticopterPositionControl::task_main()
if (_control_mode.flag_armed && !was_armed) {
/* reset setpoints and integrals on arming */
reset_sp_z = true;
reset_sp_xy = true;
_reset_lat_lon_sp = true;
_reset_alt_sp = true;
reset_int_z = true;
reset_int_xy = true;
}
@ -529,60 +559,26 @@ MulticopterPositionControl::task_main()
_control_mode.flag_control_climb_rate_enabled ||
_control_mode.flag_control_velocity_enabled) {
_pos(0) = _local_pos.x;
_pos(1) = _local_pos.y;
_pos(2) = _local_pos.z;
_vel(0) = _local_pos.vx;
_vel(1) = _local_pos.vy;
_vel(2) = _local_pos.vz;
_vel(0) = _global_pos.vel_n;
_vel(1) = _global_pos.vel_e;
_vel(2) = _global_pos.vel_d;
sp_move_rate.zero();
if (_local_pos.ref_timestamp != ref_timestamp) {
/* initialize local projection with new reference */
double lat_home = _local_pos.ref_lat * 1e-7;
double lon_home = _local_pos.ref_lon * 1e-7;
map_projection_init(lat_home, lon_home);
mavlink_log_info(mavlink_fd, "[mpc] local pos ref: %.7f, %.7f", (double)lat_home, (double)lon_home);
if (_control_mode.flag_control_manual_enabled && ref_timestamp != 0) {
/* correct setpoint in manual mode to stay in the same point */
float ref_change_x = 0.0f;
float ref_change_y = 0.0f;
map_projection_project(ref_lat, ref_lon, &ref_change_x, &ref_change_y);
_pos_sp(0) += ref_change_x;
_pos_sp(1) += ref_change_y;
_pos_sp(2) += _local_pos.ref_alt - ref_alt;
}
ref_timestamp = _local_pos.ref_timestamp;
ref_lat = _local_pos.ref_lat;
ref_lon = _local_pos.ref_lon;
ref_alt = _local_pos.ref_alt;
}
/* select control source */
if (_control_mode.flag_control_manual_enabled) {
/* manual control */
if (_control_mode.flag_control_altitude_enabled) {
/* reset setpoint Z to current altitude if needed */
if (reset_sp_z) {
reset_sp_z = false;
_pos_sp(2) = _pos(2);
mavlink_log_info(mavlink_fd, "[mpc] reset alt sp: %.2f", (double) - _pos_sp(2));
}
/* reset alt setpoint to current altitude if needed */
reset_alt_sp();
/* move altitude setpoint with throttle stick */
sp_move_rate(2) = -scale_control(_manual.throttle - 0.5f, 0.5f, alt_ctl_dz);
}
if (_control_mode.flag_control_position_enabled) {
/* reset setpoint XY to current position if needed */
if (reset_sp_xy) {
reset_sp_xy = false;
_pos_sp(0) = _pos(0);
_pos_sp(1) = _pos(1);
mavlink_log_info(mavlink_fd, "[mpc] reset pos sp: %.2f, %.2f", (double)_pos_sp(0), (double)_pos_sp(1));
}
/* reset lat/lon setpoint to current position if needed */
reset_lat_lon_sp();
/* move position setpoint with roll/pitch stick */
sp_move_rate(0) = scale_control(-_manual.pitch / _params.rc_scale_pitch, 1.0f, pos_ctl_dz);
@ -602,85 +598,96 @@ MulticopterPositionControl::task_main()
sp_move_rate = R_yaw_sp * sp_move_rate.emult(_params.vel_max);
/* move position setpoint */
_pos_sp += sp_move_rate * dt;
add_vector_to_global_position(_lat_sp, _lon_sp, sp_move_rate(0) * dt, sp_move_rate(1) * dt, &_lat_sp, &_lon_sp);
_alt_sp -= sp_move_rate(2) * dt;
/* check if position setpoint is too far from actual position */
math::Vector<3> pos_sp_offs;
pos_sp_offs.zero();
if (_control_mode.flag_control_position_enabled) {
pos_sp_offs(0) = (_pos_sp(0) - _pos(0)) / _params.sp_offs_max(0);
pos_sp_offs(1) = (_pos_sp(1) - _pos(1)) / _params.sp_offs_max(1);
get_vector_to_next_waypoint_fast(_global_pos.lat, _global_pos.lon, _lat_sp, _lon_sp, &pos_sp_offs.data[0], &pos_sp_offs.data[1]);
pos_sp_offs(0) /= _params.sp_offs_max(0);
pos_sp_offs(1) /= _params.sp_offs_max(1);
}
if (_control_mode.flag_control_altitude_enabled) {
pos_sp_offs(2) = (_pos_sp(2) - _pos(2)) / _params.sp_offs_max(2);
pos_sp_offs(2) = -(_alt_sp - _global_pos.alt) / _params.sp_offs_max(2);
}
float pos_sp_offs_norm = pos_sp_offs.length();
if (pos_sp_offs_norm > 1.0f) {
pos_sp_offs /= pos_sp_offs_norm;
_pos_sp = _pos + pos_sp_offs.emult(_params.sp_offs_max);
add_vector_to_global_position(_lat_sp, _lon_sp, pos_sp_offs(0) * _params.sp_offs_max(0), pos_sp_offs(1) * _params.sp_offs_max(1), &_lat_sp, &_lon_sp);
_alt_sp = _global_pos.alt - pos_sp_offs(2) * _params.sp_offs_max(2);
}
/* fill position setpoint triplet */
_pos_sp_triplet.previous.valid = true;
_pos_sp_triplet.current.valid = true;
_pos_sp_triplet.next.valid = true;
_pos_sp_triplet.current.type = SETPOINT_TYPE_NORMAL;
_pos_sp_triplet.current.lat = _lat_sp;
_pos_sp_triplet.current.lon = _lon_sp;
_pos_sp_triplet.current.alt = _alt_sp;
_pos_sp_triplet.current.yaw = _att_sp.yaw_body;
_pos_sp_triplet.current.loiter_radius = 0.0f;
_pos_sp_triplet.current.loiter_direction = 1.0f;
_pos_sp_triplet.current.pitch_min = 0.0f;
/* publish position setpoint triplet */
if (_pos_sp_triplet_pub > 0) {
orb_publish(ORB_ID(position_setpoint_triplet), _pos_sp_triplet_pub, &_pos_sp_triplet);
} else {
/* AUTO */
if (_pos_sp_triplet.current.valid) {
struct position_setpoint_s current_sp = _pos_sp_triplet.current;
_pos_sp(2) = -(current_sp.alt - ref_alt);
map_projection_project(current_sp.lat, current_sp.lon, &_pos_sp(0), &_pos_sp(1));
if (isfinite(current_sp.yaw)) {
_att_sp.yaw_body = current_sp.yaw;
_pos_sp_triplet_pub = orb_advertise(ORB_ID(position_setpoint_triplet), &_pos_sp_triplet);
}
} else if (_control_mode.flag_control_auto_enabled) {
/* AUTO */
bool updated;
orb_check(_pos_sp_triplet_sub, &updated);
if (updated)
orb_copy(ORB_ID(position_setpoint_triplet), _pos_sp_triplet_sub, &_pos_sp_triplet);
if (_pos_sp_triplet.current.valid) {
/* in case of interrupted mission don't go to waypoint but stay at current position */
reset_sp_xy = true;
reset_sp_z = true;
_reset_lat_lon_sp = true;
_reset_alt_sp = true;
_lat_sp = _pos_sp_triplet.current.lat;
_lon_sp = _pos_sp_triplet.current.lon;
_alt_sp = _pos_sp_triplet.current.alt;
} else {
/* no waypoint, loiter, reset position setpoint if needed */
if (reset_sp_xy) {
reset_sp_xy = false;
_pos_sp(0) = _pos(0);
_pos_sp(1) = _pos(1);
reset_lat_lon_sp();
reset_alt_sp();
}
if (reset_sp_z) {
reset_sp_z = false;
_pos_sp(2) = _pos(2);
}
}
}
/* copy resulting setpoint to vehicle_local_position_setpoint topic for logging */
_local_pos_sp.yaw = _att_sp.yaw_body;
_local_pos_sp.x = _pos_sp(0);
_local_pos_sp.y = _pos_sp(1);
_local_pos_sp.z = _pos_sp(2);
/* publish local position setpoint */
if (_local_pos_sp_pub > 0) {
orb_publish(ORB_ID(vehicle_local_position_setpoint), _local_pos_sp_pub, &_local_pos_sp);
} else {
_local_pos_sp_pub = orb_advertise(ORB_ID(vehicle_local_position_setpoint), &_local_pos_sp);
/* no control, reset setpoint */
reset_lat_lon_sp();
reset_alt_sp();
}
/* run position & altitude controllers, calculate velocity setpoint */
math::Vector<3> pos_err = _pos_sp - _pos;
math::Vector<3> pos_err;
float err_x, err_y;
get_vector_to_next_waypoint_fast(_global_pos.lat, _global_pos.lon, _lat_sp, _lon_sp, &pos_err.data[0], &pos_err.data[1]);
pos_err(2) = -(_alt_sp - _global_pos.alt);
_vel_sp = pos_err.emult(_params.pos_p) + sp_move_rate.emult(_params.vel_ff);
if (!_control_mode.flag_control_altitude_enabled) {
reset_sp_z = true;
_reset_alt_sp = true;
_vel_sp(2) = 0.0f;
}
if (!_control_mode.flag_control_position_enabled) {
reset_sp_xy = true;
_reset_lat_lon_sp = true;
_vel_sp(0) = 0.0f;
_vel_sp(1) = 0.0f;
}
@ -730,7 +737,7 @@ MulticopterPositionControl::task_main()
}
thrust_int(2) = -i;
mavlink_log_info(mavlink_fd, "[mpc] reset hovering thrust: %.2f", (double)i);
mavlink_log_info(_mavlink_fd, "[mpc] reset hovering thrust: %.2f", (double)i);
}
} else {
@ -742,7 +749,7 @@ MulticopterPositionControl::task_main()
reset_int_xy = false;
thrust_int(0) = 0.0f;
thrust_int(1) = 0.0f;
mavlink_log_info(mavlink_fd, "[mpc] reset xy vel integral");
mavlink_log_info(_mavlink_fd, "[mpc] reset xy vel integral");
}
} else {
@ -946,8 +953,8 @@ MulticopterPositionControl::task_main()
} else {
/* position controller disabled, reset setpoints */
reset_sp_z = true;
reset_sp_xy = true;
_reset_alt_sp = true;
_reset_lat_lon_sp = true;
reset_int_z = true;
reset_int_xy = true;
}
@ -957,7 +964,7 @@ MulticopterPositionControl::task_main()
}
warnx("stopped");
mavlink_log_info(mavlink_fd, "[mpc] stopped");
mavlink_log_info(_mavlink_fd, "[mpc] stopped");
_control_task = -1;
_exit(0);