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74 Commits

Author SHA1 Message Date
CarlOlsson c8e3c24150 adopted ekf_helper.cpp 2016-11-05 12:19:01 +01:00
Paul Riseborough b10b0184c5 EKF: Add IMU vibration calculation and reporting 
Add calculation and reporting of IMU delta angle and velocity coning and high frequency vibration
 2016-10-19 21:46:55 +11:00
Roman 17c195d1cd ekf2 height reset: do not apply height change to height state twice (bug) 
Signed-off-by: Roman <bapstroman@gmail.com>
 2016-10-18 07:58:19 +02:00
Roman f80b3481a4 reset the newest output sample for all possible resets 
Signed-off-by: Roman <bapstroman@gmail.com>
 2016-10-12 08:54:38 +02:00
Roman 238d947239 proper handling of position and velocity reset 
- position reset method was returning before the actual delta values
were written and applied to the output buffer
- apply reset delta also to the output sample which was already taken out
from the output buffer, otherwise the complementary filter solution is
offset from the ekf solution

Signed-off-by: Roman <bapstroman@gmail.com>
 2016-10-12 08:54:38 +02:00
Paul Riseborough 352750e5d1 EKF: publish ekf solution status summary data 2016-10-06 09:02:29 +02:00
Paul Riseborough 007e73379f EKF: Improve reporting of position error 2016-10-06 09:02:29 +02:00
Paul Riseborough 744b79c1b2 EKF: Publish innovation test ratios 2016-10-06 09:02:29 +02:00
Paul Riseborough 65762e5998 EKF: publish output predictor tracking errors 2016-10-03 14:13:07 +11:00
Julian Oes 616aeb9ad7 ekf_helper: fix forgotten return value 2016-09-27 16:36:29 +02:00
Beat Küng 73b8ac954d ekf_helper.cpp: remove unused includes 
This fixes a compile error with GCC 5.2.0 and cross-compilation:
/usr/arm-none-eabi/include/c++/5.2.0/arm-none-eabi/armv7e-m/fpu/bits/error_constants.h:122:27: error: 'ENOTSUP' was not declared in this scope
       not_supported =     ENOTSUP,

The problem was that the #include <iomanip> was taken from the host system,
which conflicts with includes from NuttX (NuttX has only basic C++ STL
support)
 2016-07-15 12:50:11 +02:00
Paul Riseborough f5e9ea1626 EKF: Prevent potential divide by zero 2016-06-30 17:06:32 +10:00
Paul Riseborough 7bc9217f00 EKF: Clean up control of observation fusion 
All the decision for a sensor are made within a specific function for that sensor and when there is data to process at the fusion time horizon.
Information and warning messages are improved.
 2016-06-30 17:06:32 +10:00
Roman Bapst bec1a6831e added method to get gyro bias 
Signed-off-by: Roman Bapst <roman@px4.io>
 2016-06-21 14:13:47 +02:00
Roman 703fb4e31b do not return early in velocity reset method otherwise 
some code will not be executed
 2016-06-08 07:51:18 +02:00
Paul Riseborough f26aca55a1 EKF: Fix bug in quaternion covariance initialisation function 
The covariances between quaternion and non-quaternion states were not being updated
 2016-06-08 13:23:30 +10:00
Paul Riseborough 6a55d908c5 EKF: replace reset event times with event counters 
Using a 64bit integer was unnecessary given it was only being used to detect a new reset event.
 2016-06-01 17:13:00 +10:00
Paul Riseborough 9ec09f5f4e EKF: update output observer and capture reset event for magnetic heading resets 2016-06-01 17:13:00 +10:00
Paul Riseborough aca0336392 EKF: update vertical position and velocity reset capture 
Use reset event struct members instead of separate variables
 2016-06-01 17:13:00 +10:00
Paul Riseborough 0605c88ecc EKF: capture horizontal position reset events 2016-06-01 17:13:00 +10:00
Paul Riseborough e3a1b4a3b3 EKF: capture velocity reset events 2016-06-01 17:13:00 +10:00
Paul Riseborough 79705da7e6 EKF: make output predictor states consistent with position reset 2016-06-01 17:13:00 +10:00
Paul Riseborough 54d90261d5 EKF: make output predictor states consistent with velocity reset 2016-06-01 17:13:00 +10:00
Paul Riseborough ad02818b3d EKF: Improve height reset for external vision 
reset to measurement closest in time to fusion time horizon
 2016-05-27 14:00:50 +10:00
Paul Riseborough 1b6c5bbafd EKF: Enable height source to be selected independent of EV aiding 2016-05-27 13:14:52 +10:00
Paul Riseborough ae5071f668 EKF: Improve heading reset 
Improves reset of quaternion covariance matrix after a heading reset by preserving variance in roll and pitch and resetting yaw variance to the measurement variance.
 2016-05-21 19:30:15 +10:00
Paul Riseborough 94a63ec9d5 EKF: don't interfere with quaternion covariances during tilt alignment 2016-05-18 19:25:19 +10:00
Paul Riseborough e4b2e9c93d EKF: Improve yaw alignment 
Uses best conditioned of 321 or 312 Euler sequence to calculate initial yaw angle.
Allows alignment of yaw angle using external vision data
 2016-05-18 12:16:16 +10:00
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