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AP_Landing: Support CCW deepstall

This commit is contained in:
Michael du Breuil 2017-10-03 22:50:25 -07:00 committed by Tom Pittenger
parent a0a16b8369
commit df8049778e
1 changed files with 10 additions and 9 deletions
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19
libraries/AP_Landing/AP_Landing_Deepstall.cpp
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@ -179,7 +179,7 @@ bool AP_Landing_Deepstall::verify_land(const Location &prev_WP_loc, Location &ne
{
switch (stage) {
case DEEPSTALL_STAGE_FLY_TO_LANDING:
if (get_distance(current_loc, landing_point) > 2 * landing.aparm.loiter_radius) {
if (get_distance(current_loc, landing_point) > fabsf(2 * landing.aparm.loiter_radius)) {
landing.nav_controller->update_waypoint(current_loc, landing_point);
return false;
}
@ -188,7 +188,7 @@ bool AP_Landing_Deepstall::verify_land(const Location &prev_WP_loc, Location &ne
FALLTHROUGH;
case DEEPSTALL_STAGE_ESTIMATE_WIND:
{
landing.nav_controller->update_loiter(landing_point, landing.aparm.loiter_radius, 1);
landing.nav_controller->update_loiter(landing_point, landing.aparm.loiter_radius, landing_point.flags.loiter_ccw ? -1 : 1);
if (!landing.nav_controller->reached_loiter_target() || (fabsf(height) > DEEPSTALL_LOITER_ALT_TOLERANCE)) {
// wait until the altitude is correct before considering a breakout
return false;
@ -196,13 +196,13 @@ bool AP_Landing_Deepstall::verify_land(const Location &prev_WP_loc, Location &ne
// only count loiter progress when within the target altitude
int32_t target_bearing = landing.nav_controller->target_bearing_cd();
int32_t delta = wrap_180_cd(target_bearing - last_target_bearing);
delta *= (landing_point.flags.loiter_ccw ? -1 : 1);
if (delta > 0) { // only accumulate turns in the correct direction
loiter_sum_cd += delta;
}
last_target_bearing = target_bearing;
if (loiter_sum_cd < 36000) {
// wait until we've done at least one complete loiter at the correct altitude
landing.nav_controller->update_loiter(landing_point, landing.aparm.loiter_radius, 1);
return false;
}
stage = DEEPSTALL_STAGE_WAIT_FOR_BREAKOUT;
@ -224,7 +224,7 @@ bool AP_Landing_Deepstall::verify_land(const Location &prev_WP_loc, Location &ne
loiter_sum_cd += delta;
}
last_target_bearing = target_bearing;
landing.nav_controller->update_loiter(landing_point, landing.aparm.loiter_radius, 1);
landing.nav_controller->update_loiter(landing_point, landing.aparm.loiter_radius, landing_point.flags.loiter_ccw ? -1 : 1);
return false;
}
stage = DEEPSTALL_STAGE_FLY_TO_ARC;
@ -243,7 +243,7 @@ bool AP_Landing_Deepstall::verify_land(const Location &prev_WP_loc, Location &ne
if (!landing.nav_controller->reached_loiter_target() ||
(fabsf(wrap_180(target_heading_deg -
degrees(atan2f(-groundspeed.y, -groundspeed.x) + M_PI))) >= 10.0f)) {
landing.nav_controller->update_loiter(arc, landing.aparm.loiter_radius, 1);
landing.nav_controller->update_loiter(arc, landing.aparm.loiter_radius, landing_point.flags.loiter_ccw ? -1 : 1);
return false;
}
stage = DEEPSTALL_STAGE_APPROACH;
@ -444,17 +444,18 @@ void AP_Landing_Deepstall::build_approach_path(bool use_current_heading)
float expected_travel_distance = predict_travel_distance(wind, landing_point.alt * 0.01f, false);
float approach_extension_m = expected_travel_distance + approach_extension;
float loiter_radius_m_abs = fabsf(loiter_radius);
// an approach extensions must be at least half the loiter radius, or the aircraft has a
// decent chance to be misaligned on final approach
approach_extension_m = MAX(approach_extension_m, loiter_radius * 0.5f);
approach_extension_m = MAX(approach_extension_m, loiter_radius_m_abs * 0.5f);
location_update(arc_exit, target_heading_deg + 180, approach_extension_m);
memcpy(&arc, &arc_exit, sizeof(Location));
memcpy(&arc_entry, &arc_exit, sizeof(Location));
// TODO: Support loitering on either side of the approach path
location_update(arc, target_heading_deg + 90.0, loiter_radius);
location_update(arc_entry, target_heading_deg + 90.0, loiter_radius * 2);
float arc_heading_deg = target_heading_deg + (landing_point.flags.loiter_ccw ? -90.0f : 90.0f);
location_update(arc, arc_heading_deg, loiter_radius_m_abs);
location_update(arc_entry, arc_heading_deg, loiter_radius_m_abs * 2);
#ifdef DEBUG_PRINTS
// TODO: Send this information via a MAVLink packet