diff options
Diffstat (limited to 'src/modules/fw_pos_control_l1/fw_pos_control_l1_main.cpp')
| -rw-r--r-- | src/modules/fw_pos_control_l1/fw_pos_control_l1_main.cpp | 548 |
1 files changed, 304 insertions, 244 deletions
diff --git a/src/modules/fw_pos_control_l1/fw_pos_control_l1_main.cpp b/src/modules/fw_pos_control_l1/fw_pos_control_l1_main.cpp index 7f13df785..189a19d48 100644 --- a/src/modules/fw_pos_control_l1/fw_pos_control_l1_main.cpp +++ b/src/modules/fw_pos_control_l1/fw_pos_control_l1_main.cpp @@ -1,7 +1,6 @@ /**************************************************************************** * - * Copyright (c) 2013 PX4 Development Team. All rights reserved. - * Author: Lorenz Meier + * Copyright (c) 2013, 2014 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 @@ -89,7 +88,11 @@ #include <launchdetection/LaunchDetector.h> #include <ecl/l1/ecl_l1_pos_controller.h> #include <external_lgpl/tecs/tecs.h> +#include <drivers/drv_range_finder.h> #include "landingslope.h" +#include "mtecs/mTecs.h" + +static int _control_task = -1; /**< task handle for sensor task */ /** @@ -115,25 +118,32 @@ public: /** * Start the sensors task. * - * @return OK on success. + * @return OK on success. + */ + static int start(); + + /** + * Task status + * + * @return true if the mainloop is running */ - int start(); + bool task_running() { return _task_running; } private: int _mavlink_fd; bool _task_should_exit; /**< if true, sensor task should exit */ - int _control_task; /**< task handle for sensor task */ + bool _task_running; /**< if true, task is running in its mainloop */ int _global_pos_sub; int _pos_sp_triplet_sub; int _att_sub; /**< vehicle attitude subscription */ - int _attitude_sub; /**< raw rc channels data subscription */ int _airspeed_sub; /**< airspeed subscription */ int _control_mode_sub; /**< vehicle status subscription */ int _params_sub; /**< notification of parameter updates */ int _manual_control_sub; /**< notification of manual control updates */ int _sensor_combined_sub; /**< for body frame accelerations */ + int _range_finder_sub; /**< range finder subscription */ orb_advert_t _attitude_sp_pub; /**< attitude setpoint */ orb_advert_t _nav_capabilities_pub; /**< navigation capabilities publication */ @@ -147,23 +157,10 @@ private: struct vehicle_global_position_s _global_pos; /**< global vehicle position */ struct position_setpoint_triplet_s _pos_sp_triplet; /**< triplet of mission items */ struct sensor_combined_s _sensor_combined; /**< for body frame accelerations */ + struct range_finder_report _range_finder; /**< range finder report */ perf_counter_t _loop_perf; /**< loop performance counter */ - bool _setpoint_valid; /**< flag if the position control setpoint is valid */ - - /** manual control states */ - float _seatbelt_hold_heading; /**< heading the system should hold in seatbelt mode */ - double _loiter_hold_lat; - double _loiter_hold_lon; - float _loiter_hold_alt; - bool _loiter_hold; - - double _launch_lat; - double _launch_lon; - float _launch_alt; - bool _launch_valid; - /* land states */ /* not in non-abort mode for landing yet */ bool land_noreturn_horizontal; @@ -180,8 +177,8 @@ private: /* Landingslope object */ Landingslope landingslope; + float flare_curve_alt_rel_last; - float flare_curve_alt_last; /* heading hold */ float target_bearing; @@ -198,15 +195,21 @@ private: ECL_L1_Pos_Controller _l1_control; TECS _tecs; + fwPosctrl::mTecs _mTecs; + bool _was_pos_control_mode; struct { float l1_period; float l1_damping; float time_const; + float time_const_throt; float min_sink_rate; float max_sink_rate; float max_climb_rate; + float climbout_diff; + float heightrate_p; + float speedrate_p; float throttle_damp; float integrator_gain; float vertical_accel_limit; @@ -226,19 +229,16 @@ private: float throttle_min; float throttle_max; float throttle_cruise; + float throttle_slew_max; float throttle_land_max; - float loiter_hold_radius; - - float heightrate_p; - float speedrate_p; - float land_slope_angle; float land_H1_virt; float land_flare_alt_relative; float land_thrust_lim_alt_relative; float land_heading_hold_horizontal_distance; + float range_finder_rel_alt; } _parameters; /**< local copies of interesting parameters */ @@ -248,9 +248,13 @@ private: param_t l1_damping; param_t time_const; + param_t time_const_throt; param_t min_sink_rate; param_t max_sink_rate; param_t max_climb_rate; + param_t climbout_diff; + param_t heightrate_p; + param_t speedrate_p; param_t throttle_damp; param_t integrator_gain; param_t vertical_accel_limit; @@ -270,19 +274,16 @@ private: param_t throttle_min; param_t throttle_max; param_t throttle_cruise; + param_t throttle_slew_max; param_t throttle_land_max; - param_t loiter_hold_radius; - - param_t heightrate_p; - param_t speedrate_p; - param_t land_slope_angle; param_t land_H1_virt; param_t land_flare_alt_relative; param_t land_thrust_lim_alt_relative; param_t land_heading_hold_horizontal_distance; + param_t range_finder_rel_alt; } _parameter_handles; /**< handles for interesting parameters */ @@ -309,6 +310,12 @@ private: bool vehicle_airspeed_poll(); /** + * Check for range finder updates. + */ + bool range_finder_poll(); + + + /** * Check for position updates. */ void vehicle_attitude_poll(); @@ -329,13 +336,18 @@ private: void navigation_capabilities_publish(); /** + * Get the relative alt either from the difference between estimate and waypoint or from the laser range finder + */ + float get_relative_landingalt(float land_setpoint_alt, float current_alt, const struct range_finder_report &range_finder, float range_finder_use_relative_alt); + + /** * Control position. */ - bool control_position(const math::Vector<2> &global_pos, const math::Vector<2> &ground_speed, + bool control_position(const math::Vector<2> &global_pos, const math::Vector<3> &ground_speed, const struct position_setpoint_triplet_s &_pos_sp_triplet); float calculate_target_airspeed(float airspeed_demand); - void calculate_gndspeed_undershoot(const math::Vector<2> ¤t_position, const math::Vector<2> &ground_speed, const struct position_setpoint_triplet_s &pos_sp_triplet); + void calculate_gndspeed_undershoot(const math::Vector<2> ¤t_position, const math::Vector<2> &ground_speed_2d, const struct position_setpoint_triplet_s &pos_sp_triplet); /** * Shim for calling task_main from task_create. @@ -345,7 +357,7 @@ private: /** * Main sensor collection task. */ - void task_main() __attribute__((noreturn)); + void task_main(); /* * Reset takeoff state @@ -356,6 +368,19 @@ private: * Reset landing state */ void reset_landing_state(); + + /* + * Call TECS : a wrapper function to call one of the TECS implementations (mTECS is called only if enabled via parameter) + * XXX need to clean up/remove this function once mtecs fully replaces TECS + */ + void tecs_update_pitch_throttle(float alt_sp, float v_sp, float eas2tas, + float pitch_min_rad, float pitch_max_rad, + float throttle_min, float throttle_max, float throttle_cruise, + bool climbout_mode, float climbout_pitch_min_rad, + float altitude, + const math::Vector<3> &ground_speed, + tecs_mode mode = TECS_MODE_NORMAL); + }; namespace l1_control @@ -367,14 +392,14 @@ namespace l1_control #endif static const int ERROR = -1; -FixedwingPositionControl *g_control; +FixedwingPositionControl *g_control = nullptr; } FixedwingPositionControl::FixedwingPositionControl() : _mavlink_fd(-1), _task_should_exit(false), - _control_task(-1), + _task_running(false), /* subscriptions */ _global_pos_sub(-1), @@ -384,46 +409,53 @@ FixedwingPositionControl::FixedwingPositionControl() : _control_mode_sub(-1), _params_sub(-1), _manual_control_sub(-1), + _sensor_combined_sub(-1), + _range_finder_sub(-1), /* publications */ _attitude_sp_pub(-1), _nav_capabilities_pub(-1), +/* states */ + _att(), + _att_sp(), + _nav_capabilities(), + _manual(), + _airspeed(), + _control_mode(), + _global_pos(), + _pos_sp_triplet(), + _sensor_combined(), + _range_finder(), + /* performance counters */ _loop_perf(perf_alloc(PC_ELAPSED, "fw l1 control")), -/* states */ - _setpoint_valid(false), - _loiter_hold(false), land_noreturn_horizontal(false), land_noreturn_vertical(false), land_stayonground(false), land_motor_lim(false), land_onslope(false), launch_detected(false), - last_manual(false), usePreTakeoffThrust(false), - flare_curve_alt_last(0.0f), + last_manual(false), + landingslope(), + flare_curve_alt_rel_last(0.0f), + target_bearing(0.0f), launchDetector(), _airspeed_error(0.0f), _airspeed_valid(false), + _airspeed_last_valid(0), _groundspeed_undershoot(0.0f), _global_pos_valid(false), - _att(), - _att_sp(), - _nav_capabilities(), - _manual(), - _airspeed(), - _control_mode(), - _global_pos(), - _pos_sp_triplet(), - _sensor_combined() + _l1_control(), + _mTecs(), + _was_pos_control_mode(false) { _nav_capabilities.turn_distance = 0.0f; _parameter_handles.l1_period = param_find("FW_L1_PERIOD"); _parameter_handles.l1_damping = param_find("FW_L1_DAMPING"); - _parameter_handles.loiter_hold_radius = param_find("FW_LOITER_R"); _parameter_handles.airspeed_min = param_find("FW_AIRSPD_MIN"); _parameter_handles.airspeed_trim = param_find("FW_AIRSPD_TRIM"); @@ -434,6 +466,7 @@ FixedwingPositionControl::FixedwingPositionControl() : _parameter_handles.roll_limit = param_find("FW_R_LIM"); _parameter_handles.throttle_min = param_find("FW_THR_MIN"); _parameter_handles.throttle_max = param_find("FW_THR_MAX"); + _parameter_handles.throttle_slew_max = param_find("FW_THR_SLEW_MAX"); _parameter_handles.throttle_cruise = param_find("FW_THR_CRUISE"); _parameter_handles.throttle_land_max = param_find("FW_THR_LND_MAX"); @@ -442,11 +475,14 @@ FixedwingPositionControl::FixedwingPositionControl() : _parameter_handles.land_flare_alt_relative = param_find("FW_LND_FLALT"); _parameter_handles.land_thrust_lim_alt_relative = param_find("FW_LND_TLALT"); _parameter_handles.land_heading_hold_horizontal_distance = param_find("FW_LND_HHDIST"); + _parameter_handles.range_finder_rel_alt = param_find("FW_LND_RFRALT"); _parameter_handles.time_const = param_find("FW_T_TIME_CONST"); + _parameter_handles.time_const_throt = param_find("FW_T_THRO_CONST"); _parameter_handles.min_sink_rate = param_find("FW_T_SINK_MIN"); _parameter_handles.max_sink_rate = param_find("FW_T_SINK_MAX"); _parameter_handles.max_climb_rate = param_find("FW_T_CLMB_MAX"); + _parameter_handles.climbout_diff = param_find("FW_CLMBOUT_DIFF"); _parameter_handles.throttle_damp = param_find("FW_T_THR_DAMP"); _parameter_handles.integrator_gain = param_find("FW_T_INTEG_GAIN"); _parameter_handles.vertical_accel_limit = param_find("FW_T_VERT_ACC"); @@ -494,7 +530,6 @@ FixedwingPositionControl::parameters_update() /* L1 control parameters */ param_get(_parameter_handles.l1_damping, &(_parameters.l1_damping)); param_get(_parameter_handles.l1_period, &(_parameters.l1_period)); - param_get(_parameter_handles.loiter_hold_radius, &(_parameters.loiter_hold_radius)); param_get(_parameter_handles.airspeed_min, &(_parameters.airspeed_min)); param_get(_parameter_handles.airspeed_trim, &(_parameters.airspeed_trim)); @@ -506,10 +541,12 @@ FixedwingPositionControl::parameters_update() param_get(_parameter_handles.throttle_min, &(_parameters.throttle_min)); param_get(_parameter_handles.throttle_max, &(_parameters.throttle_max)); param_get(_parameter_handles.throttle_cruise, &(_parameters.throttle_cruise)); + param_get(_parameter_handles.throttle_slew_max, &(_parameters.throttle_slew_max)); param_get(_parameter_handles.throttle_land_max, &(_parameters.throttle_land_max)); param_get(_parameter_handles.time_const, &(_parameters.time_const)); + param_get(_parameter_handles.time_const_throt, &(_parameters.time_const_throt)); param_get(_parameter_handles.min_sink_rate, &(_parameters.min_sink_rate)); param_get(_parameter_handles.max_sink_rate, &(_parameters.max_sink_rate)); param_get(_parameter_handles.throttle_damp, &(_parameters.throttle_damp)); @@ -521,6 +558,7 @@ FixedwingPositionControl::parameters_update() param_get(_parameter_handles.speed_weight, &(_parameters.speed_weight)); param_get(_parameter_handles.pitch_damping, &(_parameters.pitch_damping)); param_get(_parameter_handles.max_climb_rate, &(_parameters.max_climb_rate)); + param_get(_parameter_handles.climbout_diff, &(_parameters.climbout_diff)); param_get(_parameter_handles.heightrate_p, &(_parameters.heightrate_p)); param_get(_parameter_handles.speedrate_p, &(_parameters.speedrate_p)); @@ -531,14 +569,18 @@ FixedwingPositionControl::parameters_update() param_get(_parameter_handles.land_thrust_lim_alt_relative, &(_parameters.land_thrust_lim_alt_relative)); param_get(_parameter_handles.land_heading_hold_horizontal_distance, &(_parameters.land_heading_hold_horizontal_distance)); + param_get(_parameter_handles.range_finder_rel_alt, &(_parameters.range_finder_rel_alt)); + _l1_control.set_l1_damping(_parameters.l1_damping); _l1_control.set_l1_period(_parameters.l1_period); _l1_control.set_l1_roll_limit(math::radians(_parameters.roll_limit)); _tecs.set_time_const(_parameters.time_const); + _tecs.set_time_const_throt(_parameters.time_const_throt); _tecs.set_min_sink_rate(_parameters.min_sink_rate); _tecs.set_max_sink_rate(_parameters.max_sink_rate); _tecs.set_throttle_damp(_parameters.throttle_damp); + _tecs.set_throttle_slewrate(_parameters.throttle_slew_max); _tecs.set_integrator_gain(_parameters.integrator_gain); _tecs.set_vertical_accel_limit(_parameters.vertical_accel_limit); _tecs.set_height_comp_filter_omega(_parameters.height_comp_filter_omega); @@ -574,6 +616,9 @@ FixedwingPositionControl::parameters_update() /* Update Launch Detector Parameters */ launchDetector.updateParams(); + /* Update the mTecs */ + _mTecs.updateParams(); + return OK; } @@ -586,17 +631,7 @@ FixedwingPositionControl::vehicle_control_mode_poll() orb_check(_control_mode_sub, &vstatus_updated); if (vstatus_updated) { - - bool was_armed = _control_mode.flag_armed; - orb_copy(ORB_ID(vehicle_control_mode), _control_mode_sub, &_control_mode); - - if (!was_armed && _control_mode.flag_armed) { - _launch_lat = _global_pos.lat; - _launch_lon = _global_pos.lon; - _launch_alt = _global_pos.alt; - _launch_valid = true; - } } } @@ -626,6 +661,20 @@ FixedwingPositionControl::vehicle_airspeed_poll() return airspeed_updated; } +bool +FixedwingPositionControl::range_finder_poll() +{ + /* check if there is a range finder measurement */ + bool range_finder_updated; + orb_check(_range_finder_sub, &range_finder_updated); + + if (range_finder_updated) { + orb_copy(ORB_ID(sensor_range_finder), _range_finder_sub, &_range_finder); + } + + return range_finder_updated; +} + void FixedwingPositionControl::vehicle_attitude_poll() { @@ -663,14 +712,23 @@ FixedwingPositionControl::vehicle_setpoint_poll() if (pos_sp_triplet_updated) { orb_copy(ORB_ID(position_setpoint_triplet), _pos_sp_triplet_sub, &_pos_sp_triplet); - _setpoint_valid = true; } } void FixedwingPositionControl::task_main_trampoline(int argc, char *argv[]) { + l1_control::g_control = new FixedwingPositionControl(); + + if (l1_control::g_control == nullptr) { + warnx("OUT OF MEM"); + return; + } + + /* only returns on exit */ l1_control::g_control->task_main(); + delete l1_control::g_control; + l1_control::g_control = nullptr; } float @@ -705,15 +763,15 @@ FixedwingPositionControl::calculate_target_airspeed(float airspeed_demand) } void -FixedwingPositionControl::calculate_gndspeed_undershoot(const math::Vector<2> ¤t_position, const math::Vector<2> &ground_speed, const struct position_setpoint_triplet_s &pos_sp_triplet) +FixedwingPositionControl::calculate_gndspeed_undershoot(const math::Vector<2> ¤t_position, const math::Vector<2> &ground_speed_2d, const struct position_setpoint_triplet_s &pos_sp_triplet) { - if (_global_pos_valid && !(pos_sp_triplet.current.type == SETPOINT_TYPE_LOITER)) { + if (pos_sp_triplet.current.valid && !(pos_sp_triplet.current.type == SETPOINT_TYPE_LOITER)) { /* rotate ground speed vector with current attitude */ math::Vector<2> yaw_vector(_R_nb(0, 0), _R_nb(1, 0)); yaw_vector.normalize(); - float ground_speed_body = yaw_vector * ground_speed; + float ground_speed_body = yaw_vector * ground_speed_2d; /* The minimum desired ground speed is the minimum airspeed projected on to the ground using the altitude and horizontal difference between the waypoints if available*/ float distance = 0.0f; @@ -754,24 +812,43 @@ void FixedwingPositionControl::navigation_capabilities_publish() } } +float FixedwingPositionControl::get_relative_landingalt(float land_setpoint_alt, float current_alt, const struct range_finder_report &range_finder, float range_finder_use_relative_alt) +{ + float rel_alt_estimated = current_alt - land_setpoint_alt; + + /* only use range finder if: + * parameter (range_finder_use_relative_alt) > 0 + * the measurement is valid + * the estimated relative altitude (from global altitude estimate and landing waypoint) <= range_finder_use_relative_alt + */ + if (range_finder_use_relative_alt < 0 || !range_finder.valid || rel_alt_estimated > range_finder_use_relative_alt ) { + return rel_alt_estimated; + } + + return range_finder.distance; + +} + bool -FixedwingPositionControl::control_position(const math::Vector<2> ¤t_position, const math::Vector<2> &ground_speed, +FixedwingPositionControl::control_position(const math::Vector<2> ¤t_position, const math::Vector<3> &ground_speed, const struct position_setpoint_triplet_s &pos_sp_triplet) { bool setpoint = true; - calculate_gndspeed_undershoot(current_position, ground_speed, pos_sp_triplet); + math::Vector<2> ground_speed_2d = {ground_speed(0), ground_speed(1)}; + calculate_gndspeed_undershoot(current_position, ground_speed_2d, pos_sp_triplet); float eas2tas = 1.0f; // XXX calculate actual number based on current measurements - // XXX re-visit - float baro_altitude = _global_pos.alt; - /* filter speed and altitude for controller */ math::Vector<3> accel_body(_sensor_combined.accelerometer_m_s2); math::Vector<3> accel_earth = _R_nb * accel_body; - _tecs.update_50hz(baro_altitude, _airspeed.indicated_airspeed_m_s, _R_nb, accel_body, accel_earth); + if (!_mTecs.getEnabled()) { + _tecs.update_50hz(_global_pos.alt /* XXX might switch to alt err here */, _airspeed.indicated_airspeed_m_s, _R_nb, accel_body, accel_earth); + } + + /* define altitude error */ float altitude_error = _pos_sp_triplet.current.alt - _global_pos.alt; /* no throttle limit as default */ @@ -781,7 +858,17 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi // XXX this should only execute if auto AND safety off (actuators active), // else integrators should be constantly reset. - if (_control_mode.flag_control_position_enabled) { + if (pos_sp_triplet.current.valid) { + + if (!_was_pos_control_mode) { + /* reset integrators */ + if (_mTecs.getEnabled()) { + _mTecs.resetIntegrators(); + _mTecs.resetDerivatives(_airspeed.true_airspeed_m_s); + } + } + + _was_pos_control_mode = true; /* get circle mode */ bool was_circle_mode = _l1_control.circle_mode(); @@ -795,6 +882,10 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi /* current waypoint (the one currently heading for) */ math::Vector<2> curr_wp((float)pos_sp_triplet.current.lat, (float)pos_sp_triplet.current.lon); + /* Initialize attitude controller integrator reset flags to 0 */ + _att_sp.roll_reset_integral = false; + _att_sp.pitch_reset_integral = false; + _att_sp.yaw_reset_integral = false; /* previous waypoint */ math::Vector<2> prev_wp; @@ -813,31 +904,29 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi } - if (pos_sp_triplet.current.type == SETPOINT_TYPE_NORMAL) { + if (pos_sp_triplet.current.type == SETPOINT_TYPE_POSITION) { /* waypoint is a plain navigation waypoint */ - _l1_control.navigate_waypoints(prev_wp, curr_wp, current_position, ground_speed); + _l1_control.navigate_waypoints(prev_wp, curr_wp, current_position, ground_speed_2d); _att_sp.roll_body = _l1_control.nav_roll(); _att_sp.yaw_body = _l1_control.nav_bearing(); - _tecs.update_pitch_throttle(_R_nb, _att.pitch, _global_pos.alt, _pos_sp_triplet.current.alt, calculate_target_airspeed(_parameters.airspeed_trim), - _airspeed.indicated_airspeed_m_s, eas2tas, - false, math::radians(_parameters.pitch_limit_min), - _parameters.throttle_min, _parameters.throttle_max, _parameters.throttle_cruise, - math::radians(_parameters.pitch_limit_min), math::radians(_parameters.pitch_limit_max)); + tecs_update_pitch_throttle(_pos_sp_triplet.current.alt, calculate_target_airspeed(_parameters.airspeed_trim), eas2tas, + math::radians(_parameters.pitch_limit_min), math::radians(_parameters.pitch_limit_max), + _parameters.throttle_min, _parameters.throttle_max, _parameters.throttle_cruise, + false, math::radians(_parameters.pitch_limit_min), _global_pos.alt, ground_speed); } else if (pos_sp_triplet.current.type == SETPOINT_TYPE_LOITER) { /* waypoint is a loiter waypoint */ _l1_control.navigate_loiter(curr_wp, current_position, pos_sp_triplet.current.loiter_radius, - pos_sp_triplet.current.loiter_direction, ground_speed); + pos_sp_triplet.current.loiter_direction, ground_speed_2d); _att_sp.roll_body = _l1_control.nav_roll(); _att_sp.yaw_body = _l1_control.nav_bearing(); - _tecs.update_pitch_throttle(_R_nb, _att.pitch, _global_pos.alt, _pos_sp_triplet.current.alt, calculate_target_airspeed(_parameters.airspeed_trim), - _airspeed.indicated_airspeed_m_s, eas2tas, - false, math::radians(_parameters.pitch_limit_min), - _parameters.throttle_min, _parameters.throttle_max, _parameters.throttle_cruise, - math::radians(_parameters.pitch_limit_min), math::radians(_parameters.pitch_limit_max)); + tecs_update_pitch_throttle(_pos_sp_triplet.current.alt, calculate_target_airspeed(_parameters.airspeed_trim), eas2tas, + math::radians(_parameters.pitch_limit_min), math::radians(_parameters.pitch_limit_max), + _parameters.throttle_min, _parameters.throttle_max, _parameters.throttle_cruise, + false, math::radians(_parameters.pitch_limit_min), _global_pos.alt, ground_speed); } else if (pos_sp_triplet.current.type == SETPOINT_TYPE_LAND) { @@ -862,7 +951,7 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi // warnx("NORET: %d, target_bearing: %d, yaw: %d", (int)land_noreturn_horizontal, (int)math::degrees(target_bearing), (int)math::degrees(_att.yaw)); - _l1_control.navigate_heading(target_bearing, _att.yaw, ground_speed); + _l1_control.navigate_heading(target_bearing, _att.yaw, ground_speed_2d); /* limit roll motion to prevent wings from touching the ground first */ _att_sp.roll_body = math::constrain(_att_sp.roll_body, math::radians(-10.0f), math::radians(10.0f)); @@ -872,7 +961,7 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi } else { /* normal navigation */ - _l1_control.navigate_waypoints(prev_wp, curr_wp, current_position, ground_speed); + _l1_control.navigate_waypoints(prev_wp, curr_wp, current_position, ground_speed_2d); } _att_sp.roll_body = _l1_control.nav_roll(); @@ -895,13 +984,14 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi float airspeed_approach = 1.3f * _parameters.airspeed_min; /* Calculate distance (to landing waypoint) and altitude of last ordinary waypoint L */ - float L_wp_distance = get_distance_to_next_waypoint(prev_wp(0), prev_wp(1), curr_wp(0), curr_wp(1)); - float L_altitude = landingslope.getLandingSlopeAbsoluteAltitude(L_wp_distance, _pos_sp_triplet.current.alt); + float L_altitude_rel = _pos_sp_triplet.previous.valid ? _pos_sp_triplet.previous.alt - _pos_sp_triplet.current.alt : 0.0f; float bearing_airplane_currwp = get_bearing_to_next_waypoint(current_position(0), current_position(1), curr_wp(0), curr_wp(1)); - float landing_slope_alt_desired = landingslope.getLandingSlopeAbsoluteAltitudeSave(wp_distance, bearing_lastwp_currwp, bearing_airplane_currwp, _pos_sp_triplet.current.alt); + float landing_slope_alt_rel_desired = landingslope.getLandingSlopeRelativeAltitudeSave(wp_distance, bearing_lastwp_currwp, bearing_airplane_currwp); - if ( (_global_pos.alt < _pos_sp_triplet.current.alt + landingslope.flare_relative_alt()) || land_noreturn_vertical) { //checking for land_noreturn to avoid unwanted climb out + float relative_alt = get_relative_landingalt(_pos_sp_triplet.current.alt, _global_pos.alt, _range_finder, _parameters.range_finder_rel_alt); + + if ( (relative_alt < landingslope.flare_relative_alt()) || land_noreturn_vertical) { //checking for land_noreturn to avoid unwanted climb out /* land with minimal speed */ @@ -911,7 +1001,7 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi /* kill the throttle if param requests it */ throttle_max = _parameters.throttle_max; - if (_global_pos.alt < _pos_sp_triplet.current.alt + landingslope.motor_lim_relative_alt() || land_motor_lim) { + if (relative_alt < landingslope.motor_lim_relative_alt() || land_motor_lim) { throttle_max = math::min(throttle_max, _parameters.throttle_land_max); if (!land_motor_lim) { land_motor_lim = true; @@ -920,20 +1010,22 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi } - float flare_curve_alt = landingslope.getFlareCurveAltitudeSave(wp_distance, bearing_lastwp_currwp, bearing_airplane_currwp, _pos_sp_triplet.current.alt); + float flare_curve_alt_rel = landingslope.getFlareCurveRelativeAltitudeSave(wp_distance, bearing_lastwp_currwp, bearing_airplane_currwp); /* avoid climbout */ - if ((flare_curve_alt_last < flare_curve_alt && land_noreturn_vertical) || land_stayonground) + if ((flare_curve_alt_rel_last < flare_curve_alt_rel && land_noreturn_vertical) || land_stayonground) { - flare_curve_alt = pos_sp_triplet.current.alt; + flare_curve_alt_rel = 0.0f; // stay on ground land_stayonground = true; } - _tecs.update_pitch_throttle(_R_nb, _att.pitch, _global_pos.alt, flare_curve_alt, calculate_target_airspeed(airspeed_land), - _airspeed.indicated_airspeed_m_s, eas2tas, - false, flare_pitch_angle_rad, - 0.0f, throttle_max, throttle_land, - flare_pitch_angle_rad, math::radians(15.0f)); + tecs_update_pitch_throttle(_pos_sp_triplet.current.alt + flare_curve_alt_rel, + calculate_target_airspeed(airspeed_land), eas2tas, + flare_pitch_angle_rad, math::radians(15.0f), + 0.0f, throttle_max, throttle_land, + false, flare_pitch_angle_rad, + _pos_sp_triplet.current.alt + relative_alt, ground_speed, + land_motor_lim ? TECS_MODE_LAND_THROTTLELIM : TECS_MODE_LAND); if (!land_noreturn_vertical) { mavlink_log_info(_mavlink_fd, "#audio: Landing, flaring"); @@ -941,46 +1033,62 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi } //warnx("Landing: flare, _global_pos.alt %.1f, flare_curve_alt %.1f, flare_curve_alt_last %.1f, flare_length %.1f, wp_distance %.1f", _global_pos.alt, flare_curve_alt, flare_curve_alt_last, flare_length, wp_distance); - flare_curve_alt_last = flare_curve_alt; + flare_curve_alt_rel_last = flare_curve_alt_rel; } else { /* intersect glide slope: * minimize speed to approach speed - * if current position is higher or within 10m of slope follow the glide slope - * if current position is below slope -10m continue on maximum of previous wp altitude or L_altitude until the intersection with the slope + * if current position is higher than the slope follow the glide slope (sink to the + * glide slope) + * also if the system captures the slope it should stay + * on the slope (bool land_onslope) + * if current position is below the slope continue at previous wp altitude + * until the intersection with slope * */ - float altitude_desired = _global_pos.alt; - if (_global_pos.alt > landing_slope_alt_desired - 10.0f) { + float altitude_desired_rel = relative_alt; + if (relative_alt > landing_slope_alt_rel_desired || land_onslope) { /* stay on slope */ - altitude_desired = landing_slope_alt_desired; + altitude_desired_rel = landing_slope_alt_rel_desired; if (!land_onslope) { mavlink_log_info(_mavlink_fd, "#audio: Landing, on slope"); land_onslope = true; } } else { /* continue horizontally */ - altitude_desired = math::max(_global_pos.alt, L_altitude); + altitude_desired_rel = _pos_sp_triplet.previous.valid ? L_altitude_rel : relative_alt; } - _tecs.update_pitch_throttle(_R_nb, _att.pitch, _global_pos.alt, altitude_desired, calculate_target_airspeed(airspeed_approach), - _airspeed.indicated_airspeed_m_s, eas2tas, - false, math::radians(_parameters.pitch_limit_min), - _parameters.throttle_min, _parameters.throttle_max, _parameters.throttle_cruise, - math::radians(_parameters.pitch_limit_min), math::radians(_parameters.pitch_limit_max)); + tecs_update_pitch_throttle(_pos_sp_triplet.current.alt + altitude_desired_rel, + calculate_target_airspeed(airspeed_approach), eas2tas, + math::radians(_parameters.pitch_limit_min), + math::radians(_parameters.pitch_limit_max), + _parameters.throttle_min, + _parameters.throttle_max, + _parameters.throttle_cruise, + false, + math::radians(_parameters.pitch_limit_min), + _pos_sp_triplet.current.alt + relative_alt, + ground_speed); } } else if (pos_sp_triplet.current.type == SETPOINT_TYPE_TAKEOFF) { /* Perform launch detection */ -// warnx("Launch detection running"); if(!launch_detected) { //do not do further checks once a launch was detected if (launchDetector.launchDetectionEnabled()) { static hrt_abstime last_sent = 0; if(hrt_absolute_time() - last_sent > 4e6) { -// warnx("Launch detection running"); mavlink_log_info(_mavlink_fd, "#audio: Launchdetection running"); last_sent = hrt_absolute_time(); } + + /* Tell the attitude controller to stop integrating while we are waiting + * for the launch */ + _att_sp.roll_reset_integral = true; + _att_sp.pitch_reset_integral = true; + _att_sp.yaw_reset_integral = true; + + /* Detect launch */ launchDetector.update(_sensor_combined.accelerometer_m_s2[0]); if (launchDetector.getLaunchDetected()) { launch_detected = true; @@ -993,7 +1101,7 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi } } - _l1_control.navigate_waypoints(prev_wp, curr_wp, current_position, ground_speed); + _l1_control.navigate_waypoints(prev_wp, curr_wp, current_position, ground_speed_2d); _att_sp.roll_body = _l1_control.nav_roll(); _att_sp.yaw_body = _l1_control.nav_bearing(); @@ -1001,25 +1109,39 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi usePreTakeoffThrust = false; /* apply minimum pitch and limit roll if target altitude is not within 10 meters */ - if (altitude_error > 15.0f) { + if (_parameters.climbout_diff > 0.001f && altitude_error > _parameters.climbout_diff) { /* enforce a minimum of 10 degrees pitch up on takeoff, or take parameter */ - _tecs.update_pitch_throttle(_R_nb, _att.pitch, _global_pos.alt, _pos_sp_triplet.current.alt, calculate_target_airspeed(1.3f * _parameters.airspeed_min), - _airspeed.indicated_airspeed_m_s, eas2tas, - true, math::max(math::radians(pos_sp_triplet.current.pitch_min), math::radians(10.0f)), - _parameters.throttle_min, _parameters.throttle_max, _parameters.throttle_cruise, - math::radians(_parameters.pitch_limit_min), math::radians(_parameters.pitch_limit_max)); + tecs_update_pitch_throttle(_pos_sp_triplet.current.alt, + calculate_target_airspeed(1.3f * _parameters.airspeed_min), + eas2tas, + math::radians(_parameters.pitch_limit_min), + math::radians(_parameters.pitch_limit_max), + _parameters.throttle_min, _parameters.throttle_max, + _parameters.throttle_cruise, + true, + math::max(math::radians(pos_sp_triplet.current.pitch_min), + math::radians(10.0f)), + _global_pos.alt, + ground_speed, + TECS_MODE_TAKEOFF); /* limit roll motion to ensure enough lift */ _att_sp.roll_body = math::constrain(_att_sp.roll_body, math::radians(-15.0f), math::radians(15.0f)); } else { - - _tecs.update_pitch_throttle(_R_nb, _att.pitch, _global_pos.alt, _pos_sp_triplet.current.alt, calculate_target_airspeed(_parameters.airspeed_trim), - _airspeed.indicated_airspeed_m_s, eas2tas, - false, math::radians(_parameters.pitch_limit_min), - _parameters.throttle_min, _parameters.throttle_max, _parameters.throttle_cruise, - math::radians(_parameters.pitch_limit_min), math::radians(_parameters.pitch_limit_max)); + tecs_update_pitch_throttle(_pos_sp_triplet.current.alt, + calculate_target_airspeed(_parameters.airspeed_trim), + eas2tas, + math::radians(_parameters.pitch_limit_min), + math::radians(_parameters.pitch_limit_max), + _parameters.throttle_min, + _parameters.throttle_max, + _parameters.throttle_cruise, + false, + math::radians(_parameters.pitch_limit_min), + _global_pos.alt, + ground_speed); } } else { @@ -1027,15 +1149,6 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi } } - // warnx("nav bearing: %8.4f bearing err: %8.4f target bearing: %8.4f", (double)_l1_control.nav_bearing(), - // (double)_l1_control.bearing_error(), (double)_l1_control.target_bearing()); - // warnx("prev wp: %8.4f/%8.4f, next wp: %8.4f/%8.4f prev:%s", (double)prev_wp(0), (double)prev_wp(1), - // (double)next_wp(0), (double)next_wp(1), (pos_sp_triplet.previous_valid) ? "valid" : "invalid"); - - // XXX at this point we always want no loiter hold if a - // mission is active - _loiter_hold = false; - /* reset landing state */ if (pos_sp_triplet.current.type != SETPOINT_TYPE_LAND) { reset_landing_state(); @@ -1051,91 +1164,10 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi _att_sp.roll_reset_integral = true; } - } else if (0/* easy mode enabled */) { - - /** EASY FLIGHT **/ - - if (0/* switched from another mode to easy */) { - _seatbelt_hold_heading = _att.yaw; - } - - if (0/* easy on and manual control yaw non-zero */) { - _seatbelt_hold_heading = _att.yaw + _manual.yaw; - } - - //XXX not used - - /* climb out control */ -// bool climb_out = false; -// -// /* user wants to climb out */ -// if (_manual.pitch > 0.3f && _manual.throttle > 0.8f) { -// climb_out = true; -// } - - /* if in seatbelt mode, set airspeed based on manual control */ - - // XXX check if ground speed undershoot should be applied here - float seatbelt_airspeed = _parameters.airspeed_min + - (_parameters.airspeed_max - _parameters.airspeed_min) * - _manual.throttle; - - _l1_control.navigate_heading(_seatbelt_hold_heading, _att.yaw, ground_speed); - _att_sp.roll_body = _l1_control.nav_roll(); - _att_sp.yaw_body = _l1_control.nav_bearing(); - _tecs.update_pitch_throttle(_R_nb, _att.pitch, _global_pos.alt, _global_pos.alt + _manual.pitch * 2.0f, - seatbelt_airspeed, - _airspeed.indicated_airspeed_m_s, eas2tas, - false, _parameters.pitch_limit_min, - _parameters.throttle_min, _parameters.throttle_max, _parameters.throttle_cruise, - _parameters.pitch_limit_min, _parameters.pitch_limit_max); - - } else if (0/* seatbelt mode enabled */) { - - /** SEATBELT FLIGHT **/ - - if (0/* switched from another mode to seatbelt */) { - _seatbelt_hold_heading = _att.yaw; - } - - if (0/* seatbelt on and manual control yaw non-zero */) { - _seatbelt_hold_heading = _att.yaw + _manual.yaw; - } - - /* if in seatbelt mode, set airspeed based on manual control */ - - // XXX check if ground speed undershoot should be applied here - float seatbelt_airspeed = _parameters.airspeed_min + - (_parameters.airspeed_max - _parameters.airspeed_min) * - _manual.throttle; - - /* user switched off throttle */ - if (_manual.throttle < 0.1f) { - throttle_max = 0.0f; - /* switch to pure pitch based altitude control, give up speed */ - _tecs.set_speed_weight(0.0f); - } - - /* climb out control */ - bool climb_out = false; - - /* user wants to climb out */ - if (_manual.pitch > 0.3f && _manual.throttle > 0.8f) { - climb_out = true; - } - - _l1_control.navigate_heading(_seatbelt_hold_heading, _att.yaw, ground_speed); - _att_sp.roll_body = _manual.roll; - _att_sp.yaw_body = _manual.yaw; - _tecs.update_pitch_throttle(_R_nb, _att.pitch, _global_pos.alt, _global_pos.alt + _manual.pitch * 2.0f, - seatbelt_airspeed, - _airspeed.indicated_airspeed_m_s, eas2tas, - climb_out, _parameters.pitch_limit_min, - _parameters.throttle_min, _parameters.throttle_max, _parameters.throttle_cruise, - _parameters.pitch_limit_min, _parameters.pitch_limit_max); - } else { + _was_pos_control_mode = false; + /** MANUAL FLIGHT **/ /* no flight mode applies, do not publish an attitude setpoint */ @@ -1152,9 +1184,9 @@ FixedwingPositionControl::control_position(const math::Vector<2> ¤t_positi _att_sp.thrust = launchDetector.getThrottlePreTakeoff(); } else { - _att_sp.thrust = math::min(_tecs.get_throttle_demand(), throttle_max); + _att_sp.thrust = math::min(_mTecs.getEnabled() ? _mTecs.getThrottleSetpoint() : _tecs.get_throttle_demand(), throttle_max); } - _att_sp.pitch_body = _tecs.get_pitch_demand(); + _att_sp.pitch_body = _mTecs.getEnabled() ? _mTecs.getPitchSetpoint() : _tecs.get_pitch_demand(); if (_control_mode.flag_control_position_enabled) { last_manual = false; @@ -1170,10 +1202,6 @@ void FixedwingPositionControl::task_main() { - /* inform about start */ - warnx("Initializing.."); - fflush(stdout); - /* * do subscriptions */ @@ -1185,6 +1213,7 @@ FixedwingPositionControl::task_main() _airspeed_sub = orb_subscribe(ORB_ID(airspeed)); _params_sub = orb_subscribe(ORB_ID(parameter_update)); _manual_control_sub = orb_subscribe(ORB_ID(manual_control_setpoint)); + _range_finder_sub = orb_subscribe(ORB_ID(sensor_range_finder)); /* rate limit vehicle status updates to 5Hz */ orb_set_interval(_control_mode_sub, 200); @@ -1207,6 +1236,8 @@ FixedwingPositionControl::task_main() fds[1].fd = _global_pos_sub; fds[1].events = POLLIN; + _task_running = true; + while (!_task_should_exit) { /* wait for up to 500ms for data */ @@ -1246,14 +1277,6 @@ FixedwingPositionControl::task_main() _mavlink_fd = open(MAVLINK_LOG_DEVICE, 0); } - static uint64_t last_run = 0; - float deltaT = (hrt_absolute_time() - last_run) / 1000000.0f; - last_run = hrt_absolute_time(); - - /* guard against too large deltaT's */ - if (deltaT > 1.0f) - deltaT = 0.01f; - /* load local copies */ orb_copy(ORB_ID(vehicle_global_position), _global_pos_sub, &_global_pos); @@ -1264,9 +1287,10 @@ FixedwingPositionControl::task_main() vehicle_setpoint_poll(); vehicle_sensor_combined_poll(); vehicle_airspeed_poll(); + range_finder_poll(); // vehicle_baro_poll(); - math::Vector<2> ground_speed(_global_pos.vel_n, _global_pos.vel_e); + math::Vector<3> ground_speed(_global_pos.vel_n, _global_pos.vel_e, _global_pos.vel_d); math::Vector<2> current_position((float)_global_pos.lat, (float)_global_pos.lon); /* @@ -1306,6 +1330,8 @@ FixedwingPositionControl::task_main() perf_end(_loop_perf); } + _task_running = false; + warnx("exiting.\n"); _control_task = -1; @@ -1328,6 +1354,39 @@ void FixedwingPositionControl::reset_landing_state() land_onslope = false; } +void FixedwingPositionControl::tecs_update_pitch_throttle(float alt_sp, float v_sp, float eas2tas, + float pitch_min_rad, float pitch_max_rad, + float throttle_min, float throttle_max, float throttle_cruise, + bool climbout_mode, float climbout_pitch_min_rad, + float altitude, + const math::Vector<3> &ground_speed, + tecs_mode mode) +{ + if (_mTecs.getEnabled()) { + /* Using mtecs library: prepare arguments for mtecs call */ + float flightPathAngle = 0.0f; + float ground_speed_length = ground_speed.length(); + if (ground_speed_length > FLT_EPSILON) { + flightPathAngle = -asinf(ground_speed(2)/ground_speed_length); + } + fwPosctrl::LimitOverride limitOverride; + if (climbout_mode) { + limitOverride.enablePitchMinOverride(M_RAD_TO_DEG_F * climbout_pitch_min_rad); + } else { + limitOverride.disablePitchMinOverride(); + } + _mTecs.updateAltitudeSpeed(flightPathAngle, altitude, alt_sp, _airspeed.true_airspeed_m_s, v_sp, mode, + limitOverride); + } else { + /* Using tecs library */ + _tecs.update_pitch_throttle(_R_nb, _att.pitch, altitude, alt_sp, v_sp, + _airspeed.indicated_airspeed_m_s, eas2tas, + climbout_mode, climbout_pitch_min_rad, + throttle_min, throttle_max, throttle_cruise, + pitch_min_rad, pitch_max_rad); + } +} + int FixedwingPositionControl::start() { @@ -1337,7 +1396,7 @@ FixedwingPositionControl::start() _control_task = task_spawn_cmd("fw_pos_control_l1", SCHED_DEFAULT, SCHED_PRIORITY_MAX - 5, - 4048, + 2000, (main_t)&FixedwingPositionControl::task_main_trampoline, nullptr); @@ -1359,17 +1418,18 @@ int fw_pos_control_l1_main(int argc, char *argv[]) if (l1_control::g_control != nullptr) errx(1, "already running"); - l1_control::g_control = new FixedwingPositionControl; - - if (l1_control::g_control == nullptr) - errx(1, "alloc failed"); - - if (OK != l1_control::g_control->start()) { - delete l1_control::g_control; - l1_control::g_control = nullptr; + if (OK != FixedwingPositionControl::start()) { err(1, "start failed"); } + /* avoid memory fragmentation by not exiting start handler until the task has fully started */ + while (l1_control::g_control == nullptr || !l1_control::g_control->task_running()) { + usleep(50000); + printf("."); + fflush(stdout); + } + printf("\n"); + exit(0); } |