diff options
Diffstat (limited to 'src/modules/fixedwing_pos_control/fixedwing_pos_control_main.c')
| -rw-r--r-- | src/modules/fixedwing_pos_control/fixedwing_pos_control_main.c | 479 |
1 files changed, 0 insertions, 479 deletions
diff --git a/src/modules/fixedwing_pos_control/fixedwing_pos_control_main.c b/src/modules/fixedwing_pos_control/fixedwing_pos_control_main.c deleted file mode 100644 index 73df3fb9e..000000000 --- a/src/modules/fixedwing_pos_control/fixedwing_pos_control_main.c +++ /dev/null @@ -1,479 +0,0 @@ -/**************************************************************************** - * - * Copyright (C) 2012 PX4 Development Team. All rights reserved. - * Author: @author Thomas Gubler <thomasgubler@student.ethz.ch> - * @author Doug Weibel <douglas.weibel@colorado.edu> - * - * 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 fixedwing_pos_control.c - * Implementation of a fixed wing attitude controller. - */ - -#include <nuttx/config.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <fcntl.h> -#include <errno.h> -#include <math.h> -#include <poll.h> -#include <time.h> -#include <drivers/drv_hrt.h> -#include <arch/board/board.h> -#include <uORB/uORB.h> -#include <uORB/topics/vehicle_global_position.h> -#include <uORB/topics/vehicle_global_position_setpoint.h> -#include <uORB/topics/vehicle_attitude_setpoint.h> -#include <uORB/topics/manual_control_setpoint.h> -#include <uORB/topics/actuator_controls.h> -#include <uORB/topics/vehicle_rates_setpoint.h> -#include <uORB/topics/vehicle_attitude.h> -#include <uORB/topics/parameter_update.h> -#include <systemlib/param/param.h> -#include <systemlib/pid/pid.h> -#include <systemlib/geo/geo.h> -#include <systemlib/perf_counter.h> -#include <systemlib/systemlib.h> - -/* - * Controller parameters, accessible via MAVLink - * - */ -PARAM_DEFINE_FLOAT(FW_HEAD_P, 0.1f); -PARAM_DEFINE_FLOAT(FW_HEADR_I, 0.1f); -PARAM_DEFINE_FLOAT(FW_HEADR_LIM, 1.5f); //TODO: think about reasonable value -PARAM_DEFINE_FLOAT(FW_XTRACK_P, 0.01745f); // Radians per meter off track -PARAM_DEFINE_FLOAT(FW_ALT_P, 0.1f); -PARAM_DEFINE_FLOAT(FW_ROLL_LIM, 0.7f); // Roll angle limit in radians -PARAM_DEFINE_FLOAT(FW_HEADR_P, 0.1f); -PARAM_DEFINE_FLOAT(FW_PITCH_LIM, 0.35f); /**< Pitch angle limit in radians per second */ - -struct fw_pos_control_params { - float heading_p; - float headingr_p; - float headingr_i; - float headingr_lim; - float xtrack_p; - float altitude_p; - float roll_lim; - float pitch_lim; -}; - -struct fw_pos_control_param_handles { - param_t heading_p; - param_t headingr_p; - param_t headingr_i; - param_t headingr_lim; - param_t xtrack_p; - param_t altitude_p; - param_t roll_lim; - param_t pitch_lim; -}; - - -struct planned_path_segments_s { - bool segment_type; - double start_lat; // Start of line or center of arc - double start_lon; - double end_lat; - double end_lon; - float radius; // Radius of arc - float arc_start_bearing; // Bearing from center to start of arc - float arc_sweep; // Angle (radians) swept out by arc around center. - // Positive for clockwise, negative for counter-clockwise -}; - - -/* Prototypes */ -/* Internal Prototypes */ -static int parameters_init(struct fw_pos_control_param_handles *h); -static int parameters_update(const struct fw_pos_control_param_handles *h, struct fw_pos_control_params *p); - -/** - * Deamon management function. - */ -__EXPORT int fixedwing_pos_control_main(int argc, char *argv[]); - -/** - * Mainloop of deamon. - */ -int fixedwing_pos_control_thread_main(int argc, char *argv[]); - -/** - * Print the correct usage. - */ -static void usage(const char *reason); - -/* Variables */ -static bool thread_should_exit = false; /**< Deamon exit flag */ -static bool thread_running = false; /**< Deamon status flag */ -static int deamon_task; /**< Handle of deamon task / thread */ - - -/** - * Parameter management - */ -static int parameters_init(struct fw_pos_control_param_handles *h) -{ - /* PID parameters */ - h->heading_p = param_find("FW_HEAD_P"); - h->headingr_p = param_find("FW_HEADR_P"); - h->headingr_i = param_find("FW_HEADR_I"); - h->headingr_lim = param_find("FW_HEADR_LIM"); - h->xtrack_p = param_find("FW_XTRACK_P"); - h->altitude_p = param_find("FW_ALT_P"); - h->roll_lim = param_find("FW_ROLL_LIM"); - h->pitch_lim = param_find("FW_PITCH_LIM"); - - return OK; -} - -static int parameters_update(const struct fw_pos_control_param_handles *h, struct fw_pos_control_params *p) -{ - param_get(h->heading_p, &(p->heading_p)); - param_get(h->headingr_p, &(p->headingr_p)); - param_get(h->headingr_i, &(p->headingr_i)); - param_get(h->headingr_lim, &(p->headingr_lim)); - param_get(h->xtrack_p, &(p->xtrack_p)); - param_get(h->altitude_p, &(p->altitude_p)); - param_get(h->roll_lim, &(p->roll_lim)); - param_get(h->pitch_lim, &(p->pitch_lim)); - - return OK; -} - - -/* Main Thread */ -int fixedwing_pos_control_thread_main(int argc, char *argv[]) -{ - /* read arguments */ - bool verbose = false; - - for (int i = 1; i < argc; i++) { - if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0) { - verbose = true; - } - } - - /* welcome user */ - printf("[fixedwing pos control] started\n"); - - /* declare and safely initialize all structs */ - struct vehicle_global_position_s global_pos; - memset(&global_pos, 0, sizeof(global_pos)); - struct vehicle_global_position_s start_pos; // Temporary variable, replace with - memset(&start_pos, 0, sizeof(start_pos)); // previous waypoint when available - struct vehicle_global_position_setpoint_s global_setpoint; - memset(&global_setpoint, 0, sizeof(global_setpoint)); - struct vehicle_attitude_s att; - memset(&att, 0, sizeof(att)); - struct crosstrack_error_s xtrack_err; - memset(&xtrack_err, 0, sizeof(xtrack_err)); - struct parameter_update_s param_update; - memset(¶m_update, 0, sizeof(param_update)); - - /* output structs */ - struct vehicle_attitude_setpoint_s attitude_setpoint; - memset(&attitude_setpoint, 0, sizeof(attitude_setpoint)); - - /* publish attitude setpoint */ - attitude_setpoint.roll_body = 0.0f; - attitude_setpoint.pitch_body = 0.0f; - attitude_setpoint.yaw_body = 0.0f; - attitude_setpoint.thrust = 0.0f; - orb_advert_t attitude_setpoint_pub = orb_advertise(ORB_ID(vehicle_attitude_setpoint), &attitude_setpoint); - - /* subscribe */ - int global_pos_sub = orb_subscribe(ORB_ID(vehicle_global_position)); - int global_setpoint_sub = orb_subscribe(ORB_ID(vehicle_global_position_setpoint)); - int att_sub = orb_subscribe(ORB_ID(vehicle_attitude)); - int param_sub = orb_subscribe(ORB_ID(parameter_update)); - - /* Setup of loop */ - struct pollfd fds[2] = { - { .fd = param_sub, .events = POLLIN }, - { .fd = att_sub, .events = POLLIN } - }; - bool global_sp_updated_set_once = false; - - float psi_track = 0.0f; - - int counter = 0; - - struct fw_pos_control_params p; - struct fw_pos_control_param_handles h; - - PID_t heading_controller; - PID_t heading_rate_controller; - PID_t offtrack_controller; - PID_t altitude_controller; - - parameters_init(&h); - parameters_update(&h, &p); - pid_init(&heading_controller, p.heading_p, 0.0f, 0.0f, 0.0f, 10000.0f, PID_MODE_DERIVATIV_NONE, 0.0f); //arbitrary high limit - pid_init(&heading_rate_controller, p.headingr_p, p.headingr_i, 0.0f, 0.0f, p.roll_lim, PID_MODE_DERIVATIV_NONE, 0.0f); - pid_init(&altitude_controller, p.altitude_p, 0.0f, 0.0f, 0.0f, p.pitch_lim, PID_MODE_DERIVATIV_NONE, 0.0f); - pid_init(&offtrack_controller, p.xtrack_p, 0.0f, 0.0f, 0.0f , 60.0f * M_DEG_TO_RAD, PID_MODE_DERIVATIV_NONE, 0.0f); //TODO: remove hardcoded value - - /* error and performance monitoring */ - perf_counter_t fw_interval_perf = perf_alloc(PC_INTERVAL, "fixedwing_pos_control_interval"); - perf_counter_t fw_err_perf = perf_alloc(PC_COUNT, "fixedwing_pos_control_err"); - - while (!thread_should_exit) { - /* wait for a sensor update, check for exit condition every 500 ms */ - int ret = poll(fds, 2, 500); - - if (ret < 0) { - /* poll error, count it in perf */ - perf_count(fw_err_perf); - - } else if (ret == 0) { - /* no return value, ignore */ - } else { - - /* only update parameters if they changed */ - if (fds[0].revents & POLLIN) { - /* read from param to clear updated flag */ - struct parameter_update_s update; - orb_copy(ORB_ID(parameter_update), param_sub, &update); - - /* update parameters from storage */ - parameters_update(&h, &p); - pid_set_parameters(&heading_controller, p.heading_p, 0, 0, 0, 10000.0f); //arbitrary high limit - pid_set_parameters(&heading_rate_controller, p.headingr_p, p.headingr_i, 0, 0, p.roll_lim); - pid_set_parameters(&altitude_controller, p.altitude_p, 0, 0, 0, p.pitch_lim); - pid_set_parameters(&offtrack_controller, p.xtrack_p, 0, 0, 0, 60.0f * M_DEG_TO_RAD); //TODO: remove hardcoded value - } - - /* only run controller if attitude changed */ - if (fds[1].revents & POLLIN) { - - - static uint64_t last_run = 0; - const float deltaT = (hrt_absolute_time() - last_run) / 1000000.0f; - last_run = hrt_absolute_time(); - - /* check if there is a new position or setpoint */ - bool pos_updated; - orb_check(global_pos_sub, &pos_updated); - bool global_sp_updated; - orb_check(global_setpoint_sub, &global_sp_updated); - - /* load local copies */ - orb_copy(ORB_ID(vehicle_attitude), att_sub, &att); - - if (pos_updated) { - orb_copy(ORB_ID(vehicle_global_position), global_pos_sub, &global_pos); - } - - if (global_sp_updated) { - orb_copy(ORB_ID(vehicle_global_position_setpoint), global_setpoint_sub, &global_setpoint); - start_pos = global_pos; //for now using the current position as the startpoint (= approx. last waypoint because the setpoint switch occurs at the waypoint) - global_sp_updated_set_once = true; - psi_track = get_bearing_to_next_waypoint((double)global_pos.lat / (double)1e7d, (double)global_pos.lon / (double)1e7d, - (double)global_setpoint.lat / (double)1e7d, (double)global_setpoint.lon / (double)1e7d); - - printf("next wp direction: %0.4f\n", (double)psi_track); - } - - /* Simple Horizontal Control */ - if (global_sp_updated_set_once) { - // if (counter % 100 == 0) - // printf("lat_sp %d, ln_sp %d, lat: %d, lon: %d\n", global_setpoint.lat, global_setpoint.lon, global_pos.lat, global_pos.lon); - - /* calculate crosstrack error */ - // Only the case of a straight line track following handled so far - int distance_res = get_distance_to_line(&xtrack_err, (double)global_pos.lat / (double)1e7d, (double)global_pos.lon / (double)1e7d, - (double)start_pos.lat / (double)1e7d, (double)start_pos.lon / (double)1e7d, - (double)global_setpoint.lat / (double)1e7d, (double)global_setpoint.lon / (double)1e7d); - - // XXX what is xtrack_err.past_end? - if (distance_res == OK /*&& !xtrack_err.past_end*/) { - - float delta_psi_c = pid_calculate(&offtrack_controller, 0, xtrack_err.distance, 0.0f, 0.0f); //p.xtrack_p * xtrack_err.distance - - float psi_c = psi_track + delta_psi_c; - float psi_e = psi_c - att.yaw; - - /* wrap difference back onto -pi..pi range */ - psi_e = _wrap_pi(psi_e); - - if (verbose) { - printf("xtrack_err.distance %.4f ", (double)xtrack_err.distance); - printf("delta_psi_c %.4f ", (double)delta_psi_c); - printf("psi_c %.4f ", (double)psi_c); - printf("att.yaw %.4f ", (double)att.yaw); - printf("psi_e %.4f ", (double)psi_e); - } - - /* calculate roll setpoint, do this artificially around zero */ - float delta_psi_rate_c = pid_calculate(&heading_controller, psi_e, 0.0f, 0.0f, 0.0f); - float psi_rate_track = 0; //=V_gr/r_track , this will be needed for implementation of arc following - float psi_rate_c = delta_psi_rate_c + psi_rate_track; - - /* limit turn rate */ - if (psi_rate_c > p.headingr_lim) { - psi_rate_c = p.headingr_lim; - - } else if (psi_rate_c < -p.headingr_lim) { - psi_rate_c = -p.headingr_lim; - } - - float psi_rate_e = psi_rate_c - att.yawspeed; - - // XXX sanity check: Assume 10 m/s stall speed and no stall condition - float ground_speed = sqrtf(global_pos.vx * global_pos.vx + global_pos.vy * global_pos.vy); - - if (ground_speed < 10.0f) { - ground_speed = 10.0f; - } - - float psi_rate_e_scaled = psi_rate_e * ground_speed / 9.81f; //* V_gr / g - - attitude_setpoint.roll_body = pid_calculate(&heading_rate_controller, psi_rate_e_scaled, 0.0f, 0.0f, deltaT); - - if (verbose) { - printf("psi_rate_c %.4f ", (double)psi_rate_c); - printf("psi_rate_e_scaled %.4f ", (double)psi_rate_e_scaled); - printf("rollbody %.4f\n", (double)attitude_setpoint.roll_body); - } - - if (verbose && counter % 100 == 0) - printf("xtrack_err.distance: %0.4f, delta_psi_c: %0.4f\n", xtrack_err.distance, delta_psi_c); - - } else { - if (verbose && counter % 100 == 0) - printf("distance_res: %d, past_end %d\n", distance_res, xtrack_err.past_end); - } - - /* Very simple Altitude Control */ - if (pos_updated) { - - //TODO: take care of relative vs. ab. altitude - attitude_setpoint.pitch_body = pid_calculate(&altitude_controller, global_setpoint.altitude, global_pos.alt, 0.0f, 0.0f); - - } - - // XXX need speed control - attitude_setpoint.thrust = 0.7f; - - /* publish the attitude setpoint */ - orb_publish(ORB_ID(vehicle_attitude_setpoint), attitude_setpoint_pub, &attitude_setpoint); - - /* measure in what intervals the controller runs */ - perf_count(fw_interval_perf); - - counter++; - - } else { - // XXX no setpoint, decent default needed (loiter?) - } - } - } - } - - printf("[fixedwing_pos_control] exiting.\n"); - thread_running = false; - - - close(attitude_setpoint_pub); - - fflush(stdout); - exit(0); - - return 0; - -} - -/* Startup Functions */ - -static void -usage(const char *reason) -{ - if (reason) - fprintf(stderr, "%s\n", reason); - - fprintf(stderr, "usage: fixedwing_pos_control {start|stop|status}\n\n"); - exit(1); -} - -/** - * The deamon app only briefly exists to start - * the background job. The stack size assigned in the - * Makefile does only apply to this management task. - * - * The actual stack size should be set in the call - * to task_create(). - */ -int fixedwing_pos_control_main(int argc, char *argv[]) -{ - if (argc < 1) - usage("missing command"); - - if (!strcmp(argv[1], "start")) { - - if (thread_running) { - printf("fixedwing_pos_control already running\n"); - /* this is not an error */ - exit(0); - } - - thread_should_exit = false; - deamon_task = task_spawn_cmd("fixedwing_pos_control", - SCHED_DEFAULT, - SCHED_PRIORITY_MAX - 20, - 2048, - fixedwing_pos_control_thread_main, - (argv) ? (const char **)&argv[2] : (const char **)NULL); - thread_running = true; - exit(0); - } - - if (!strcmp(argv[1], "stop")) { - thread_should_exit = true; - exit(0); - } - - if (!strcmp(argv[1], "status")) { - if (thread_running) { - printf("\tfixedwing_pos_control is running\n"); - - } else { - printf("\tfixedwing_pos_control not started\n"); - } - - exit(0); - } - - usage("unrecognized command"); - exit(1); -} |