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Merge pull request #122 from CarlOlsson/airspeed_fix

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fixed_airspeed_healthy_bug
This commit is contained in:
Paul Riseborough 2016-05-09 10:24:22 +10:00
commit 3cdf56e57c
2 changed files with 8 additions and 5 deletions
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11
EKF/airspeed_fusion.cpp
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@ -124,9 +124,9 @@ void Ekf::fuseAirspeed()
Kfusion[23] = SK_TAS[0]*(P[23][4]*SH_TAS[2] - P[23][22]*SH_TAS[2] + P[23][5]*SK_TAS[1] - P[23][23]*SK_TAS[1] + P[23][6]*vd*SH_TAS[0]);
// calculate measurement innovation
// Calculate measurement innovation
_airspeed_innov = v_tas_pred -
_airspeed_sample_delayed.true_airspeed; // This is TAS, maybe we should indicate that in some way
_airspeed_sample_delayed.true_airspeed;
// Calculate the innovation variance
_airspeed_innov_var = 1.0f / SK_TAS[0];
@ -134,13 +134,16 @@ void Ekf::fuseAirspeed()
// Compute the ratio of innovation to gate size
_tas_test_ratio = sq(_airspeed_innov) / (sq(fmaxf(_params.tas_innov_gate, 1.0f)) * _airspeed_innov_var);
// if the innocation consistency check fails then don't fuse the sample and indicate bad airspeed health
// If the innovation consistency check fails then don't fuse the sample and indicate bad airspeed health
if (_tas_test_ratio > 1.0f) {
_airspeed_healthy = false;
return;
}
else {
_airspeed_healthy = true;
}
// airspeed measurement sample has passed check so record it
// Airspeed measurement sample has passed check so record it
_time_last_arsp_fuse = _time_last_imu;
// update covariance matrix via Pnew = (I - KH)P = P - KHP

2
EKF/estimator_interface.h
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@ -268,7 +268,7 @@ protected:
struct map_projection_reference_s _pos_ref = {}; // Contains WGS-84 position latitude and longitude (radians)
bool _mag_healthy; // computed by mag innovation test
float _airspeed_healthy; // computed by airspeed innovation test
bool _airspeed_healthy; // computed by airspeed innovation test
float _yaw_test_ratio; // yaw innovation consistency check ratio
float _mag_test_ratio[3]; // magnetometer XYZ innovation consistency check ratios
float _vel_pos_test_ratio[6]; // velocity and position innovation consistency check ratios