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EKF: Consolidate no aiding reset logic

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This commit is contained in:
Paul Riseborough 2017-10-20 08:25:50 +11:00
parent 929c5c2b37
commit a2dcd5b9b6
1 changed files with 21 additions and 47 deletions
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68
EKF/control.cpp
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@ -134,7 +134,8 @@ void Ekf::controlFusionModes()
// report dead reckoning if we are no longer fusing measurements that constrain velocity drift
_is_dead_reckoning = (_time_last_imu - _time_last_pos_fuse > _params.no_aid_timeout_max)
&& (_time_last_imu - _time_last_vel_fuse > _params.no_aid_timeout_max)
&& (_time_last_imu - _time_last_of_fuse > _params.no_aid_timeout_max);
&& (_time_last_imu - _time_last_of_fuse > _params.no_aid_timeout_max)
&& ((_time_last_imu - _time_last_arsp_fuse > _params.no_aid_timeout_max) || (_time_last_imu - _time_last_beta_fuse > _params.no_aid_timeout_max));
}
@ -261,20 +262,11 @@ void Ekf::controlExternalVisionFusion()
fuseHeading();
}
}
} else if (_control_status.flags.ev_pos && (_time_last_imu - _time_last_ext_vision > 5e6)) {
// Turn off EV fusion mode if no data has been received
_control_status.flags.ev_pos = false;
ECL_INFO("EKF External Vision Data Stopped");
// handle the case when we are relying on ev data and lose it
if (_control_status.flags.ev_pos && !_control_status.flags.gps && !_control_status.flags.opt_flow) {
// We are relying on ev aiding to constrain drift so after 5s without aiding we need to do something
if ((_time_last_imu - _time_last_pos_fuse > 5e6)) {
// Switch to the non-aiding mode, zero the velocity states
// and set the synthetic position to the current estimate
_control_status.flags.ev_pos = false;
_last_known_posNE(0) = _state.pos(0);
_last_known_posNE(1) = _state.pos(1);
_state.vel.setZero();
}
}
}
@ -381,21 +373,10 @@ void Ekf::controlOpticalFlowFusion()
_last_known_posNE(1) = _state.pos(1);
}
}
// handle the case when we are relying on optical flow fusion and lose it
if ((_time_last_imu - _time_last_of_fuse > 5e6) && _control_status.flags.opt_flow) {
ECL_INFO("EKF Stopping Optical Flow Use");
} else if (_control_status.flags.opt_flow && (_time_last_imu - _time_last_optflow > 5e6)) {
ECL_INFO("EKF Optical Flow Data Stopped");
_control_status.flags.opt_flow = false;
// We are relying on flow aiding to constrain attitude drift so after 5s without aiding we need to do something
if (!_control_status.flags.gps && !_control_status.flags.ev_pos) {
// Switch to the non-aiding mode, zero the velocity states
// and set the synthetic position to the current estimate
_last_known_posNE(0) = _state.pos(0);
_last_known_posNE(1) = _state.pos(1);
_state.vel.setZero();
ECL_WARN("EKF stopping navigation");
}
}
}
@ -491,27 +472,10 @@ void Ekf::controlGpsFusion()
}
} else {
// handle the case where we do not have GPS and have not been using it for an extended period, but are still relying on it
bool lost_gps = _control_status.flags.gps && (_time_last_imu - _time_last_gps > 10e6);
// If we don't have a source of aiding to constrain attitude drift, then we need to switch
// to the non-aiding mode, zero the velocity states and set the position to the current estimate.
// Air data aiding prevents loss of attitude reference, constrains velocity drift and can assist
// a FW vehicle to recover to the launch area.
if (lost_gps) {
} else if (_control_status.flags.gps && (_time_last_imu - _time_last_gps > 10e6)) {
_control_status.flags.gps = false;
ECL_WARN("EKF GPS data stopped");
}
bool no_velpos_aiding = !_control_status.flags.opt_flow && !_control_status.flags.ev_pos;
bool no_airdata_aiding = (_time_last_imu - _time_last_arsp_fuse > 10e6) || (_time_last_imu - _time_last_beta_fuse > 10e6);
if (!_control_status.flags.gps && no_velpos_aiding && no_airdata_aiding) {
_last_known_posNE(0) = _state.pos(0);
_last_known_posNE(1) = _state.pos(1);
_state.vel.setZero();
ECL_WARN("EKF stopping navigation");
}
}
}
@ -1281,7 +1245,17 @@ void Ekf::controlVelPosFusion()
!_control_status.flags.opt_flow &&
!_control_status.flags.ev_pos &&
!(_control_status.flags.fuse_aspd && _control_status.flags.fuse_beta) &&
((_time_last_imu - _time_last_fake_gps > 2e5) || _fuse_height)) {
((_time_last_imu - _time_last_fake_gps > 2e5) || _fuse_height))
{
// Reset position and velocity states if we re-commence this aiding method
if ((_time_last_imu - _time_last_fake_gps) > 4E5) {
_last_known_posNE(0) = _state.pos(0);
_last_known_posNE(1) = _state.pos(1);
_state.vel.setZero();
ECL_WARN("EKF stopping navigation");
}
_fuse_pos = true;
_time_last_fake_gps = _time_last_imu;