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449 Commits 514 Branches 136 Tags 234 MiB
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46 Commits

Author SHA1 Message Date
Paul Riseborough 57b2a256f7 EKF: Improve initialisation of quaternion covariances 
Convert uncertainty in initial rotate vector into quaternion covariances using symbolic toolbox derived expressions.
Enable setting of initial angle uncertainty via a parameter
 2016-05-17 12:47:20 +10:00
Paul Riseborough 1540e937b1 EKF: Improve tilt alignment monitoring 
Convert quaternion covariances into an angular alignment variance vector and discard the z component so that yaw uncertainty does not affect the result.
 2016-05-17 11:17:24 +10:00
Paul Riseborough 81469d6621 EKF: Add position, height and velocity reset for EV aiding 2016-05-14 21:17:29 +10:00
Paul Riseborough 25682dce91 EKF: Prevent badly conditioned covariance calculation when starting or resetting to optical flow 2016-05-08 10:30:40 +10:00
Paul Riseborough 7f5669fb2d EKF: consolidate covariance corrections 
Combines the forced symmetry, variance limiting and zeroing of covariances for unwanted states in the one function.
This ensures a consistent correction is applied after every covariance prediction or correction.
 2016-05-07 20:29:50 +10:00
Paul Riseborough da9d894441 EKF: Improvements to covariance reset 2016-05-07 12:57:41 +10:00
Paul Riseborough fe9f88a8b4 EKF: test new derivation 
Use direct attitude parameterisation
Discard scale factors
Add accel bias
 2016-05-05 21:23:03 +10:00
Roman 0c77ebf6bd EKF: Reduce likelihood of bad covariance values after height resets 
The cross terms (covariances) are now reset before the variance variance is set.

The vertical velocity state variance following a reset without GPS has been reduced.
 2016-05-01 21:39:56 +10:00
Paul Riseborough 469a7d1711 EKF: rework height reset 
calculate and save the amount that the vertical states have changed and the time of the change
apply the change delta to the output observer states and buffer
 2016-04-22 08:43:56 +10:00
Paul Riseborough 2fa8a11a29 EKF: replace unnecessary memcopy 2016-04-19 19:10:41 +10:00
Paul Riseborough 31bf342fc1 EKF: publish GPS check status 2016-04-19 17:38:22 +10:00
Paul Riseborough e10093854a EKF: correct outputs for IMU offset 2016-04-12 11:14:31 +10:00
Paul Riseborough 74078cde94 EKF: reset state variance when performing a height reset 
Set vertical position and velocity variances using known sensor error characteristics if we have reset the states to the sensor readings.
 2016-04-11 19:40:27 +10:00
Paul Riseborough f4f108d57d EKF: Reset vertical velocity when performing a height reset 2016-04-11 19:25:24 +10:00
CarlOlsson f8878d41dc adopted ekf_helper.cpp 2016-03-30 17:01:03 +02:00
Paul Riseborough 6b2e2dba90 EKF: Add GPS height option and improve height recovery 2016-03-16 10:40:51 +11:00
Paul Riseborough c58ab3e256 EKF: Enable fallback to baro alt when using range finder for height 2016-03-13 21:17:51 +11:00
Paul Riseborough 370f643f42 EKF: Enable use of range finder for primary height source 2016-03-13 18:44:34 +11:00
Paul Riseborough e0fcce1463 EKF: Make position and velocity reset publish success 
Some users of the position and velocity reset functions will need to know if the reset has been successful.
 2016-03-11 11:03:43 +11:00
Paul Riseborough 32b03819ef EKF: Add function to calculate global position validity 2016-03-11 11:03:43 +11:00
Paul Riseborough 270451e17b EKF: Update height reset to support range finder height use 2016-03-11 11:03:43 +11:00
Paul Riseborough f7a53d69f2 EKF: Improve height reset function 
Add a method to reset the vertical velocity to enable in-flight resets
Reset to GPS height if baro height is not available.
 2016-03-02 08:39:07 +01:00
Paul Riseborough 78d6f6941c Merge pull request #61 from PX4/pr-ImprovedAccuracyReporting 
EKF: Improve Position Accuracy Reporting
 2016-02-26 22:48:44 +11:00
Roman Bapst 9192ced7bb do not reset output attitude state after heading reset to avoid jumps in attitude 2016-02-25 18:20:29 +01:00
Paul Riseborough cd0cac066a EKF: Calculate and publish horizontal and vertical position accuracy 
This calculation takes into account the uncertainty of the origin.
Dead reckoning status is also published
 2016-02-25 10:38:07 +11:00
Paul Riseborough 380db7ebef EKF: Reset angle error covariance after yaw and mag field reset 
The yaw angle could have changed by a significant amount making the correlations invalid.
Setting angle variances to zero prevents the initial kick in angles due to 3D fusion starting
 2016-02-25 08:16:42 +11:00
bugobliterator 263c48d089 EKF: remove dependecies and allow ekf to be built as standalone shared lib 2016-02-17 17:33:18 -08:00
Paul Riseborough de02aebafd EKF: Reset covariance matrix when doing a yaw and magnetic field reset 
The correlation terms in the covariance matrix will be incorrect after a reset, so should be zeroed
 2016-02-14 22:01:53 +01:00
Paul Riseborough 83945581ed EKF: Add function to calculate the magnetic declination to use 2016-02-14 22:01:53 +01:00
Paul Riseborough 6140d4b21f EKF: Add function to reset yaw and magnetic field states 2016-02-14 22:01:53 +01:00
Roman ce0ddc0207 -added comments 
-removed unused print functions
-removed false _imu_time_last variable (correct is _time_last_imu)
 2016-02-14 09:49:26 +01:00
Paul Riseborough 9d7340e187 EKF: Fix bugs in position and velocity resets 
The position reset was not being compensated for velocity and measurement delay
The height was being reset with the position. It has been moved into a separate reset function
The maximum accepted GPS delay of 100msec was inadequate
The states  was being incorrectly reset to the GPS position and Baro height on initial alignment.
 2016-02-14 09:49:26 +01:00
Paul Riseborough da1de2cc4d EKF: Correct for sensor noise and baro offset during alignment 2016-02-14 09:49:26 +01:00
CarlOlsson 1e766c7510 moved fuse function to ekf_helper.cpp 2016-02-12 15:54:32 +01:00
Paul Riseborough fff2bd50f6 EKF: Fix bugs in position and velocity resets 
The position reset was not being compensated for velocity and measurement delay
The height was being reset with the position. It has been moved into a separate reset function
The maximum accepted GPS delay of 100msec was inadequate
The states  was being incorrectly reset to the GPS position and Baro height on initial alignment.
 2016-02-10 15:16:05 +11:00
Paul Riseborough 40e174b81c EKF: Correct for sensor noise and baro offset during alignment 2016-02-10 10:25:27 +11:00
bugobliterator d79e12dfa1 EKF: fix code style 2016-01-31 00:12:16 -08:00
bugobliterator 251996d387 ekf: move gps checks to Ekf library from estimator_base 2016-01-29 17:15:18 -08:00
Paul Riseborough 46b0e9654c Add filter control logic 2016-01-30 09:01:48 +11:00
Roman 8d0022ab1e enable estimator state and innovations data logging 2016-01-22 11:31:14 +01:00
nickolasrossi dfbbd36ff7 fix buffer overflow in constrain of wind velocity 2016-01-19 18:25:22 -08:00
Roman 2a88fc6cfd initialise vertical position correctly 2016-01-08 06:42:22 +01:00
Mark Charlebois b8837b4dc6 Added hexagon support 
std::to_string is not supported in the Hexagon complier

Signed-off-by: Mark Charlebois <charlebm@gmail.com>
 2016-01-07 14:54:55 -08:00
Roman f153a7cb44 added ifdef guard 2015-12-19 09:40:32 +01:00
Roman 8de8b0eb76 prediction and vel pos heading fusion working 2015-12-09 17:47:52 +01:00
Roman b3491bcfc3 added file with ekf helper functions 2015-12-06 13:19:25 +01:00