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author | Julian Oes <julian@oes.ch> | 2014-09-20 19:07:34 +1000 |
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committer | Julian Oes <julian@oes.ch> | 2014-09-20 19:07:34 +1000 |
commit | 6aee0baa30b8127fe86a149ae3fe4083584856a2 (patch) | |
tree | b11cfde43ff06330c0c3f1048188b4355bec6f00 | |
parent | a7e1ba9a00cb2e40149acfd66621911b8bd1cdee (diff) | |
parent | 8296a14e9befae6b36ef04aff78c502f3c7b08a7 (diff) | |
download | px4-firmware-6aee0baa30b8127fe86a149ae3fe4083584856a2.tar.gz px4-firmware-6aee0baa30b8127fe86a149ae3fe4083584856a2.tar.bz2 px4-firmware-6aee0baa30b8127fe86a149ae3fe4083584856a2.zip |
Merge pull request #12 from swissfang/bottledrop
Drop at the exact timing, drop only if facing into the right direction
-rw-r--r-- | src/modules/bottle_drop/bottle_drop.cpp | 30 | ||||
-rw-r--r-- | src/modules/bottle_drop/bottle_drop_params.c | 6 |
2 files changed, 24 insertions, 12 deletions
diff --git a/src/modules/bottle_drop/bottle_drop.cpp b/src/modules/bottle_drop/bottle_drop.cpp index 53071630d..49919fd4a 100644 --- a/src/modules/bottle_drop/bottle_drop.cpp +++ b/src/modules/bottle_drop/bottle_drop.cpp @@ -384,6 +384,7 @@ BottleDrop::task_main() float x_f, y_f; // to-be position of the UAV after dt_runs seconds in projected coordinates double x_f_NED, y_f_NED; // to-be position of the UAV after dt_runs seconds in NED float distance_open_door; // The distance the UAV travels during its doors open [m] + float approach_error = 0.0f; // The error in radians between current ground vector and desired ground vector float distance_real = 0; // The distance between the UAVs position and the drop point [m] float future_distance = 0; // The distance between the UAVs to-be position and the drop point [m] @@ -505,11 +506,21 @@ BottleDrop::task_main() float windspeed_norm = sqrtf(wind.windspeed_north * wind.windspeed_north + wind.windspeed_east * wind.windspeed_east); float groundspeed_body = sqrtf(_global_pos.vel_n * _global_pos.vel_n + _global_pos.vel_e * _global_pos.vel_e); - distance_real = fabsf(get_distance_to_next_waypoint(_global_pos.lat, _global_pos.lon, _drop_position.lat, _drop_position.lon)); ground_distance = _global_pos.alt - _target_position.alt; - if (counter % 90 == 0) { - mavlink_log_info(_mavlink_fd, "#audio: drop distance %.2f", (double)distance_real); + // Distance to drop position and angle error to approach vector + // are relevant in all states greater than target valid (which calculates these positions) + if (_drop_state > DROP_STATE_TARGET_VALID) { + distance_real = fabsf(get_distance_to_next_waypoint(_global_pos.lat, _global_pos.lon, _drop_position.lat, _drop_position.lon)); + + float ground_direction = atan2f(_global_pos.vel_e, _global_pos.vel_n); + float approach_direction = get_bearing_to_next_waypoint(flight_vector_s.lat, flight_vector_s.lon, flight_vector_e.lat, flight_vector_e.lon); + + approach_error = _wrap_pi(ground_direction - approach_direction); + + if (counter % 90 == 0) { + mavlink_log_critical(_mavlink_fd, "drop distance %u, heading error %u", (unsigned)distance_real, (unsigned)math::degrees(approach_error)); + } } switch (_drop_state) { @@ -608,6 +619,9 @@ BottleDrop::task_main() _onboard_mission_pub = orb_advertise(ORB_ID(onboard_mission), &_onboard_mission); } + float approach_direction = get_bearing_to_next_waypoint(flight_vector_s.lat, flight_vector_s.lon, flight_vector_e.lat, flight_vector_e.lon); + mavlink_log_critical(_mavlink_fd, "position set, approach heading: %u", (unsigned)distance_real, (unsigned)math::degrees(approach_direction + M_PI_F)); + _drop_state = DROP_STATE_TARGET_SET; } break; @@ -622,9 +636,10 @@ BottleDrop::task_main() } else { // We're close enough - open the bay - distance_open_door = math::max(5.0f, 3.0f * fabsf(t_door * groundspeed_body)); + distance_open_door = math::max(10.0f, 3.0f * fabsf(t_door * groundspeed_body)); - if (isfinite(distance_real) && distance_real < distance_open_door) { + if (isfinite(distance_real) && distance_real < distance_open_door && + fabsf(approach_error) < math::radians(20.0f)) { open_bay(); _drop_state = DROP_STATE_BAY_OPEN; mavlink_log_info(_mavlink_fd, "#audio: opening bay"); @@ -642,11 +657,8 @@ BottleDrop::task_main() map_projection_reproject(&ref, x_f, y_f, &x_f_NED, &y_f_NED); future_distance = get_distance_to_next_waypoint(x_f_NED, y_f_NED, _drop_position.lat, _drop_position.lon); - warnx("Distance real: %.2f", (double)distance_real); - if (isfinite(distance_real) && - (distance_real < precision) && ((distance_real < future_distance) || - (distance_real < precision / 10.0f))) { + (distance_real < precision) && ((distance_real < future_distance))) { drop(); _drop_state = DROP_STATE_DROPPED; mavlink_log_info(_mavlink_fd, "#audio: payload dropped"); diff --git a/src/modules/bottle_drop/bottle_drop_params.c b/src/modules/bottle_drop/bottle_drop_params.c index e5d35bf0a..51ebfb9a1 100644 --- a/src/modules/bottle_drop/bottle_drop_params.c +++ b/src/modules/bottle_drop/bottle_drop_params.c @@ -92,11 +92,11 @@ PARAM_DEFINE_FLOAT(BD_PRECISION, 30.0f); * http://en.wikipedia.org/wiki/Drag_coefficient * * @unit meter - * @min 1.0 - * @max 80.0 + * @min 0.08 + * @max 1.5 * @group Payload drop */ -PARAM_DEFINE_FLOAT(BD_OBJ_CD, 0.86f); +PARAM_DEFINE_FLOAT(BD_OBJ_CD, 0.1f); /** * Payload mass |