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AP_NavEKF : Fix bug in Z accel bias update for IMU1

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Paul Riseborough 2015-03-20 16:53:31 -07:00 committed by Andrew Tridgell
parent 5d0952ba23
commit 92df3adb5e
1 changed files with 9 additions and 6 deletions
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3
libraries/AP_NavEKF/AP_NavEKF.cpp
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@ -2191,8 +2191,10 @@ void NavEKF::FuseVelPosNED()
// attitude, velocity and position corrections are spread across multiple prediction cycles between now // attitude, velocity and position corrections are spread across multiple prediction cycles between now
// and the anticipated time for the next measurement. // and the anticipated time for the next measurement.
// Don't spread quaternion corrections if total angle change across predicted interval is going to exceed 0.1 rad // Don't spread quaternion corrections if total angle change across predicted interval is going to exceed 0.1 rad
// Don't apply corrections to Z bias state as this has been done already as part of the single IMU calculations
bool highRates = ((gpsUpdateCountMax * correctedDelAng.length()) > 0.1f); bool highRates = ((gpsUpdateCountMax * correctedDelAng.length()) > 0.1f);
for (uint8_t i = 0; i<=21; i++) { for (uint8_t i = 0; i<=21; i++) {
if (i != 13) {
if ((i <= 3 && highRates) || i >= 10 || constPosMode || constVelMode) { if ((i <= 3 && highRates) || i >= 10 || constPosMode || constVelMode) {
states[i] = states[i] - Kfusion[i] * innovVelPos[obsIndex]; states[i] = states[i] - Kfusion[i] * innovVelPos[obsIndex];
} else { } else {
@ -2203,6 +2205,7 @@ void NavEKF::FuseVelPosNED()
} }
} }
} }
}
state.quat.normalize(); state.quat.normalize();
// update the covariance - take advantage of direct observation of a single state at index = stateIndex to reduce computations // update the covariance - take advantage of direct observation of a single state at index = stateIndex to reduce computations