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15597 Commits

Author SHA1 Message Date
Paul Riseborough 496d31ab83 AP_NavEKF: Reduce max time Copters can reject GPS 
The maximum time copters can reject GPS has been reduced from 10 to 7 seconds as flight logs have show that inertial dead reckoning with vibration and calibration errors is not good enough to support 10 seconds without aiding.
 2015-04-03 15:15:08 -07:00
Paul Riseborough 8c2029d896 AP_NavEKF: Accel bias learning improvements 
Speed up pre-flight learning
Smoothen in-flight learning
 2015-04-03 15:15:08 -07:00
Paul Riseborough 19d1b3b813 AP_NavEKF: Update EKF origin height whilst disarmed 
This patch causes the EKF to update the height of its origin each time it receives a valid GPs message whislt disarmed.
The resultant EKF origin height represents the height of the zero baro alt datum relative to the GPS height datum.
 2015-04-03 15:15:08 -07:00
Paul Riseborough 70afcd7e70 AP_NavEKF: Add second stage alignment of yaw and earth field states 
Flight tests have shown that the magnetic field distortion associated with flight from steel structures can extend 3m or higher. To counteract this, a second and final yaw and magnetic field alignment has been added which is activated when the height exceeds 5m for the first time.
 2015-04-03 15:15:08 -07:00
Paul Riseborough ed9c05cf2a AP_NavEKF: Remove logic used to delay fusion for load levelling 
Logic used to delay optical flow and airspeed fusion to prevent it occurring on the same time step as magnetometer fusion has been removed. This is no longer required to efficiency improvements made at the firmware level.
 2015-04-03 15:15:07 -07:00
Paul Riseborough c0d23ffc30 AP_NavEKF: Filter accuracy and stability improvements 
Improvements in PX4 firmware have reduced the computational load  and mkae the previous practicwe of splitting magnetometer and optical flow fusion across multiple time steps unnecessary and make it possible to perform a covariance prediction prior to fusing data on the same time step. This patch:

1) Ensures that a covariance prediction is always performed prior to fusion of any observation
2) Removes the splitting of magnetometer fusion so that fusion of the X,Y and Z components occurs on the same time time step
3) Removes the splitting of optical flow fusion so that fusion of X and Y components occurs on the same time step
 2015-04-03 15:15:07 -07:00
Jonathan Challinger de1f7f5e63 AP_NavEKF: use published delta velocities and delta angles if available 2015-04-03 15:15:07 -07:00
priseborough 3421a320b5 AP_NavEKF: Compensate for ground effect when takeoff or landing expected 2015-04-03 15:15:07 -07:00
Jonathan Challinger 20d92f5f9d AP_NavEKF: floor GPS velocity noise at parameter value for conservatism 2015-04-03 15:15:07 -07:00
priseborough 9a797a5d49 AP_NavEKF: Use GPS reported speed accuracy if available 
UBlox receivers report an estimate of the speed accuracy that tests show correlates well to speed glitches. Using this to scale the GPS velocity observation noise will reduce the effect of bad GPS velocity data.
 2015-04-03 15:15:06 -07:00
Andrew Tridgell 45e016ea5b AP_InertialSensor: check for zero delta_velocity dt 2015-04-03 15:10:47 -07:00
Jonathan Challinger b306d7a356 AP_InertialSensor: accel cal sample for 400ms instead of 1s 2015-04-03 14:54:19 -07:00
Jonathan Challinger 1e1d8efa22 AP_InertialSensor: use expected update rate for accel cal sampling 2015-04-03 14:54:17 -07:00
Jonathan Challinger bd84328440 AP_InertialSensor: hack to "reset" the accel filter before taking a cal sample 2015-04-03 14:54:15 -07:00
Jonathan Challinger b2b42e081a AP_InertialSensor: use delta_velocity/dt for calibration if available 2015-04-03 14:54:10 -07:00
Jonathan Challinger 423160eaf8 AP_InertialSensor: publish delta_velocity_dt 2015-04-03 14:54:06 -07:00
Andrew Tridgell 4147825b87 AP_InertialSensor: fixed gyro calibration bug 
we must not update _gyro_offset[] until we have completed calibration
of that gyro, or we will end up using the new offsets when asking for
the raw gyro vector
 2015-04-03 06:57:30 -07:00
Andrew Tridgell 2aa73c427b PX4: enable temperature compensation in hmc5883 driver 2015-04-02 14:35:52 -07:00
Andrew Tridgell 728dbf24db AP_Math: fixed vector inequality test 
many thanks to cat888

fixes issue #2039
 2015-04-01 20:40:37 -07:00
Randy Mackay 912a5d80b1 Tracker: fix serial manager integration 2015-04-01 15:13:41 -07:00
Randy Mackay 8f49c96b1a Rover: fix serial manager integration 2015-04-01 15:13:31 -07:00
Randy Mackay 7e4dd9666c Plane: fix serial manager integration 2015-04-01 15:13:20 -07:00
Randy Mackay a32220636a Tracker: integrate Serial Manager instance 2015-04-01 14:59:30 -07:00
Randy Mackay ff1d6dea61 APMRover: integrate Serial Manager instance 2015-04-01 14:59:28 -07:00
Randy Mackay ab749f884f Plane: integrate Serial Manager instance 2015-04-01 14:59:26 -07:00
Randy Mackay 24f24a7db7 Copter: integrate Serial Manager instance 2015-04-01 14:59:25 -07:00
Randy Mackay d738eda59d GCS_MAVLink: integrate Serial Manager instance 2015-04-01 14:59:23 -07:00
Randy Mackay 1ed7737669 Mount: integrate Serial Manager instance 2015-04-01 14:59:21 -07:00
Randy Mackay cbcd32d698 GPS: integrate Serial Manager instance 2015-04-01 14:59:20 -07:00
Randy Mackay c148330c2b FrSkyTelem: integrate Serial Manager instance 2015-04-01 14:59:18 -07:00
Randy Mackay aef16160dc SerialManager: consolidate MAVLink1 and 2 2015-04-01 14:59:17 -07:00
Andrew Tridgell a0028e3faf autotest: fixed SITL without ROS installed 2015-04-01 12:28:41 -07:00
Randy Mackay ca92821445 Filter: LowPassFilter gets another div-by-zero check 2015-04-01 10:34:28 -07:00
Jonathan Challinger 57f8a4d29d Filter: add get_cutoff_frequency 2015-04-01 10:15:07 -07:00
Jonathan Challinger 1828515b3b AP_Motors: bug fix to _batt_voltage_filt 2015-04-01 10:15:06 -07:00
Jonathan Challinger 89cdd02f58 AP_Motors: remove duplicate get_throttle function 2015-04-01 10:15:05 -07:00
Jonathan Challinger 0e53c0a892 AP_Motors: make output_armed() and output_disarmed() pure virtual 2015-04-01 10:14:38 -07:00
Andrew Tridgell 70855027f3 autotest: added Iris ROS simulator support 
use -f IrisRos
 2015-04-01 09:14:03 -07:00
Andrew Tridgell f82f0da2b3 autotest: support sims that do their own time control 2015-04-01 09:12:11 -07:00
Andrew Tridgell 5947160fd7 autotest: removed delta_time from update_position() 
not available in some backends, and not needed
 2015-04-01 09:11:25 -07:00
Andrew Tridgell 5acc4c333b AP_Arming: accept accel/gyro if OK in last 10 seconds 
this should prevent short periods of movement from triggering arming
status change alarms
 2015-03-31 15:37:24 -07:00
Andrew Tridgell 6a33588f67 Plane: make LOG_BITMASK logging when disarmed clearer 2015-03-31 14:38:09 -07:00
Randy Mackay e1900f646f Copter: remove PREARM_MAX_VELOCITY definition 2015-03-30 18:08:34 -07:00
Jonathan Challinger ffc445098b Copter: remove velocity pre-arm check 2015-03-30 16:44:50 -07:00
Randy Mackay 3f3e622be5 AC_PID: fix example sketch 2015-03-30 16:07:56 -07:00
Andrew Tridgell ea10877113 Replay: fix handling of old IMU messages 2015-03-28 10:52:37 -07:00
Andrew Tridgell 8ba043e593 AP_AHRS: fixed EKF startup bug 
This fixes the EKF for when GPS lock takes more than 10 seconds

fixes issue #2010
 2015-03-28 10:52:22 -07:00
Andrew Tridgell 3289d38339 AP_NavEKF: make the init functions return bool 
we need to know if it has initialised successfully
 2015-03-28 10:51:38 -07:00
Andrew Tridgell cf15b4d4fc autotest: removed use of --nowait option 2015-03-27 18:03:24 -07:00
Andrew Tridgell 7cd7ff89fd HAL_PX4: recover 12k of ram from USB buffers 
faster NuttX means we don't need such larger buffers
 2015-03-27 15:08:52 -07:00