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author | Anton Babushkin <anton.babushkin@me.com> | 2014-05-16 22:12:07 +0200 |
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committer | Anton Babushkin <anton.babushkin@me.com> | 2014-05-16 22:12:07 +0200 |
commit | 692e8f84a93a932986004d896554a70380ea11e9 (patch) | |
tree | b9cdef755d925813dd277200134b1d05c0550c9a /src/modules/position_estimator_inav/position_estimator_inav_main.c | |
parent | a72015c260dbb4e70d23c35120269cef61a439cc (diff) | |
download | px4-firmware-692e8f84a93a932986004d896554a70380ea11e9.tar.gz px4-firmware-692e8f84a93a932986004d896554a70380ea11e9.tar.bz2 px4-firmware-692e8f84a93a932986004d896554a70380ea11e9.zip |
commander: don't require good EPH for local_position_valid, position_estimator_inav: estimate EPH/EPV and publish it in local position topic
Diffstat (limited to 'src/modules/position_estimator_inav/position_estimator_inav_main.c')
-rw-r--r-- | src/modules/position_estimator_inav/position_estimator_inav_main.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/src/modules/position_estimator_inav/position_estimator_inav_main.c b/src/modules/position_estimator_inav/position_estimator_inav_main.c index d8d0ff37d..fdc3233e0 100644 --- a/src/modules/position_estimator_inav/position_estimator_inav_main.c +++ b/src/modules/position_estimator_inav/position_estimator_inav_main.c @@ -199,6 +199,9 @@ int position_estimator_inav_thread_main(int argc, char *argv[]) float y_est[3] = { 0.0f, 0.0f, 0.0f }; float z_est[3] = { 0.0f, 0.0f, 0.0f }; + float eph = 1.0; + float epv = 1.0; + float x_est_prev[3], y_est_prev[3], z_est_prev[3]; memset(x_est_prev, 0, sizeof(x_est_prev)); memset(y_est_prev, 0, sizeof(y_est_prev)); @@ -535,6 +538,8 @@ int position_estimator_inav_thread_main(int argc, char *argv[]) flow_valid = true; + eph = fminf(eph, 0.1 / att.R[2][2] / flow_q * fmaxf(1.0f, flow_dist)); // under ideal conditions, on 1m distance assume EPH = 10cm + } else { w_flow = 0.0f; flow_valid = false; @@ -673,6 +678,9 @@ int position_estimator_inav_thread_main(int argc, char *argv[]) corr_gps[2][1] = 0.0f; } + eph = fminf(eph, gps.eph_m); + epv = fminf(epv, gps.epv_m); + w_gps_xy = min_eph_epv / fmaxf(min_eph_epv, gps.eph_m); w_gps_z = min_eph_epv / fmaxf(min_eph_epv, gps.epv_m); } @@ -712,6 +720,10 @@ int position_estimator_inav_thread_main(int argc, char *argv[]) dt = fmaxf(fminf(0.02, dt), 0.002); // constrain dt from 2 to 20 ms t_prev = t; + /* increase EPH/EPV on each step */ + eph *= 1.0 + dt; + epv += 0.005 * dt; // add 1m to EPV each 200s (baro drift) + /* use GPS if it's valid and reference position initialized */ bool use_gps_xy = ref_inited && gps_valid && params.w_xy_gps_p > MIN_VALID_W; bool use_gps_z = ref_inited && gps_valid && params.w_z_gps_p > MIN_VALID_W; @@ -723,7 +735,7 @@ int position_estimator_inav_thread_main(int argc, char *argv[]) xy_src_time = t; } - bool can_estimate_xy = (t < xy_src_time + xy_src_timeout); + bool can_estimate_xy = eph < max_eph_epv * 1.5; bool dist_bottom_valid = (t < sonar_valid_time + sonar_valid_timeout); @@ -922,6 +934,8 @@ int position_estimator_inav_thread_main(int argc, char *argv[]) local_pos.landed = landed; local_pos.yaw = att.yaw; local_pos.dist_bottom_valid = dist_bottom_valid; + local_pos.eph = eph; + local_pos.epv = epv; if (local_pos.dist_bottom_valid) { local_pos.dist_bottom = -z_est[0] - surface_offset; @@ -950,9 +964,8 @@ int position_estimator_inav_thread_main(int argc, char *argv[]) global_pos.yaw = local_pos.yaw; - // TODO implement dead-reckoning - global_pos.eph = gps.eph_m; - global_pos.epv = gps.epv_m; + global_pos.eph = eph; + global_pos.epv = epv; if (vehicle_global_position_pub < 0) { vehicle_global_position_pub = orb_advertise(ORB_ID(vehicle_global_position), &global_pos); |