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AP_NavEKF: Fix bug allowing terrain to be above vehicle position 

The terrain state and vehicle state need to be compared at the same time horizon.
This commit is contained in:
Paul Riseborough 2015-04-10 18:02:26 +10:00 committed by Randy Mackay
parent 6d58c63c4c
commit e79ccf1fcc
1 changed files with 2 additions and 0 deletions
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libraries/AP_NavEKF/AP_NavEKF.cpp
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@ -3938,6 +3938,8 @@ void NavEKF::ConstrainStates()
for (uint8_t i=16; i<=18; i++) states[i] = constrain_float(states[i],-1.0f,1.0f);
// body magnetic field limit
for (uint8_t i=19; i<=21; i++) states[i] = constrain_float(states[i],-0.5f,0.5f);
// constrain the terrain offset state
terrainState = max(terrainState, state.position.z + RNG_MEAS_ON_GND);
}
// update IMU delta angle and delta velocity measurements