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772 Commits

Author SHA1 Message Date
Peter Barker 806b2708c1 AP_NavEKF3: change namespace of MultiCopter and FixedWing params 
this stops the libraries knowing anything about AP_Vehicle
 2022-11-09 19:04:37 +11:00
Andrew Tridgell 92f25150f6 AP_NavEKF3: fixed getLLH alt for local origin height 
this fixes a bug introduced in #21834

this fix in #21834 was correct for getPosD, but should not have been
applied to getLLH

this caused cruise mode in plane to descend/ascend by the difference
between the public and local origins on mode entry

fixes #21984
 2022-10-23 11:23:48 +11:00
jackhong12 4a4f361a17 all: use CLASS_NO_COPY() macro 2022-10-04 11:23:04 +11:00
Andrew Tridgell 17d9018a91 AP_NavEKF3: fixed EKF3 origin alt inconsistency 
always use common origin, and adjust output posD for difference
between public and local lane origin heights
 2022-09-30 07:44:42 +10:00
Paul Riseborough 481bec5ff5 AP_NavEKF3: Allow wind states to recover faster when airspeed sensor failed 2022-09-26 14:17:53 +10:00
Paul Riseborough 399f30bfce AP_NavEKF3: Allow reporting of airspeed consistency for a deselected sensor 2022-09-26 14:17:53 +10:00
Paul Riseborough eb0e9230a1 AP_NavEKF3: Add accessor function for airspeed health monitoring 2022-09-26 14:17:53 +10:00
Paul Riseborough 608b4c0713 AP_NavEKF3: Enable monitoring of unhealthy airspeed sensors 
Innovations and innovation test ratios will still be calculated and reported for an unhealthy sensor, but the EKF states wnd covariance matrix will not be modified.
 2022-09-26 14:17:53 +10:00
Peter Barker 0665f9c32b AP_NavEKF3: store and use lastKnownPositionD 
When returning our last-known-position we were supplying lat/lng but not
altitude.

This usually really doesn't matter as this result generally isn't used,
especially for altitude.  OTOH, it may prevent a bug into the future.
 2022-08-22 19:48:03 +10:00
nrt 0c65cd1b47 AP_NavEKF3: added a getter function to infer the source index used by ekf3 2022-08-18 02:05:27 -04:00
Peter Barker 1b13dd053b AP_NavEKF3: use send_mesage for sending status report 2022-08-16 09:45:51 +10:00
Peter Barker 0443c8561b AP_NavEKF3: stop using GCS_MAVLINK.h in header files 
... by passing through a reference to a link object instead
 2022-08-16 09:45:51 +10:00
Tamas Nepusz 8959d35b91 AP_NavEKF3: add EK3_GPS_VACC_MAX as a threshold that decides whether to use GPS as altitude source depending on vAcc 2022-08-03 17:57:05 +10:00
Henry Wurzburg b7f49db1f7 AP_NavEKF3: Add streaming log verbosity level parameter 2022-08-02 10:21:39 +10:00
Iampete1 cf14e741ee AP_NavEKF3: only include log struture if enabled 2022-07-13 18:14:12 +10:00
Andrew Tridgell e2a83ba428 AP_NavEKF3: fixed undefined behaviour in logging 2022-07-12 11:00:08 +10:00
Pierre Kancir 21890000f7 AP_NavEKF3: fix python files exec permissions 2022-06-08 08:16:42 +09:00
Andrew Tridgell d5670ace3b AP_NavEKF3: fixed use of configured() vs configured_in_storage() 2022-06-06 13:11:50 +10:00
Andrew Tridgell 74c4f3c9a9 AP_NavEKF3: log set source events 2022-05-31 09:17:37 +10:00
Randy Mackay eafb118b47 AP_NavEKF3: set filter status dead_reckoning bit 2022-05-25 20:05:21 +09:00
Randy Mackay e37bf9ad53 AP_NavEKF3: drag fusion for att and velAiding 
also add dragTimeout
 2022-05-25 20:05:21 +09:00
Randy Mackay 61c4643aed AP_NavEKF3: minor comment fix 2022-05-25 20:05:21 +09:00
Ruffalo-sunghwan 5a4d61e3a4 AP_NavEKF3 : correct comment spelling 2022-05-24 20:27:45 +09:00
Randy Mackay e0023a99bc AP_NavEKF3: replace AP_HAL::millis() with dal.millis() 2022-05-18 17:59:57 +10:00
Randy Mackay 37e9ce3fb7 AP_NavEKF3: correct wind estimate param descriptions 
EK3_MCOEF becomes EK3_DRAG_MCOEF
EK3_BCOEF_X/Y becomes EK3_DRAG_BCOEF_X/Y
 2022-04-13 07:57:35 +09:00
Peter Barker 0b16c4063e AP_NavEKF3: stop libraries including AP_Logger.h in .h files 
AP_Logger.h is a nexus of includes; while this is being improved over
time, there's no reason for the library headers to include AP_Logger.h
as the logger itself is access by singleton and the structures are in
LogStructure.h

This necessitated moving The PID_Info structure out of AP_Logger's
namespace.  This cleans up a pretty nasty bit - that structure is
definitely not simply used for logging, but also used to pass pid
information around to controllers!

There are a lot of patches in here because AP_Logger.h, acting as a
nexus, was providing transitive header file inclusion in many (some
unlikely!) places.
 2022-04-08 19:18:38 +10:00
Peter Barker adf9c21d48 AP_NavEKF3: remove instance id from EK3 external interface 
Removes passing of instance id in interfaces where -1 was the only value
ever passed in
 2022-04-06 17:36:05 +10:00
Peter Barker df4911cbcb AP_NavEKF3: avoid direct use of Location alt field 2022-03-22 10:33:37 +11:00
Andrew Tridgell a4da65ea05 AP_NavEKF3: fixed constrain indexing bug 
fixes #20180

thanks to @liyue75 for spotting this!
 2022-03-01 17:06:44 +09:00
Henry Wurzburg 0f05cb06fa AP_NavEKF3: update and correct GSF parameter documentation 2022-02-15 10:56:35 +11:00
Randy Mackay 0c7ad9511f AP_NavEKF3: FuseOptFlow only calculates range and velocity once 
was unnecessarily recalculating these values before fusion
 2022-02-09 08:42:29 +09:00
Andrew Tridgell 9dcff1a23f AP_NavEKF3: set rejecting_airspeed flag 
we report as rejecting airspeed when we have not fused airspeed for 3s
and want to use airspeed
 2022-02-07 14:13:49 +11:00
Randy Mackay cfcdc1e78f AP_NavEKF3: optflow terrain reset after 5sec 2022-02-02 18:04:43 +11:00
Randy Mackay e16a64383f AP_NavEKF3: getOptFlowSample returns latest correct flow data for use in calibration 2022-01-29 08:26:12 +09:00
Randy Mackay cff3794d25 AP_NavEKF3: minor spelling fixes 2022-01-17 11:30:47 +09:00
VMsunghwan db9c1bbfaf AP_NavEKF3 : correct typo 
receverPosDownMax -> receiverPosDownMax
receverPosDownMin -> receiverPosDownMin
calcuate -> calculate
 2022-01-17 11:25:56 +09:00
Hwurzburg 970e5f829b AP_NavEKF3: remove user unintelligible GCS message 2022-01-12 08:11:18 +11:00
Andrew Tridgell a33febd90a AP_NavEKF3: fixed gaps in EKF logging 
timestamps should not be static as otherwise some lanes will not be
logged
 2021-12-28 16:03:47 +11:00
Paul Riseborough 5178f4a7d0 AP_NavEKF3: Add missing covariance row reset 2021-12-20 09:28:37 +11:00
Peter Barker 0cb4425eb9 AP_NavEKF3: fix type, 'willbe' -> 'will be' 2021-12-17 09:44:57 +09:00
Peter Barker 15ec2c9c40 AP_NavEKF3: allow boards to override NavEKF3 features 2021-12-14 11:12:50 +11:00
Andrew Tridgell 468444bef9 AP_NavEKF3: revert compass parameter changes 2021-12-04 16:51:53 +11:00
Peter Barker 308f4e99b4 AP_NavEKF3: correct structure used for logging 
XKF4 and XKF5 are clones of NKF4 and NKF5, which is why this worked
 2021-12-03 15:34:21 +09:00
Josh Henderson a89f58a775 AP_NavEKF3: allow define for IMU_MASK_DEFAULT 2021-11-30 10:20:54 +11:00
Iampete1 e818decc39 AP_NavEKF3: update compass param discription 2021-11-30 08:14:43 +09:00
Andrew Tridgell 86c481b4b0 AP_NavEKF3: fixed switch to non-zero primary on disarm 
if EK3_PRIMARY is not zero then we were not switching to it when
disarmed
 2021-11-07 10:11:52 +11:00
Andrew Tridgell 282209e3e6 AP_NavEKF3: add accessor for GSF yaw estimator 2021-11-01 09:00:27 +11:00
Andy Piper bc0101e446 AP_NavEKF3: convert APM_BUILD_COPTER_OR_HELI() to APM_BUILD_COPTER_OR_HELI 2021-10-26 11:42:12 +11:00
Peter Barker 670663a741 AP_NavEKF3: allow hwdef to override IMU default 2021-10-16 10:26:29 +11:00
Gone4Dirt 0abfde0a7d AP_NavEKF3: Add APM_BUILD_Heli 2021-09-29 19:55:48 +10:00
Josh Henderson 67eb6d17eb AP_NavEKF3: initialize stateStruct.quat to unit length 2021-09-28 19:09:16 +10:00
Paul Riseborough c828bdfbc9 AP_NavEKF3: Reduce output observer vertical velocity error when bad IMU 2021-09-23 18:55:28 +10:00
Paul Riseborough 8429c66860 AP_NavEKF3: Make subsequent bad IMU event detections faster 2021-09-23 18:55:28 +10:00
Paul Riseborough 458c67639d AP_NavEKF3: Force velocity state to follow GPS when IMU data is bad 2021-09-23 18:55:28 +10:00
Paul Riseborough c0d88e2673 AP_NavEKF3: Fix vertical velocity reset 
Fixes bug that prevents the vertical velocity being reset to the GPS if the position aiding has already timed out and improves sensitivity of the bad IMU data check.
 2021-09-23 18:55:28 +10:00
Paul Riseborough 17c2ba5ac1 AP_NavEKF3: Fix bug causing too frequent resets if bad IMU data detected 2021-09-23 18:55:28 +10:00
Peter Barker b66fd214f0 AP_NavEKF3: move from HAL_NO_GCS to HAL_GCS_ENABLED 2021-09-22 21:37:00 +10:00
Paul Riseborough e9c339a0a0 AP_NavEKF3: fix wind speed covariance initialisation bug 2021-09-21 17:16:36 +10:00
Josh Henderson 3006d50f97 AP_NavEKF3: use vector.xy().length() instead of norm(x,y) 2021-09-14 10:43:46 +10:00
Peter Barker dabba69b5e AP_NavEKF3: improve description of XKF4/NKF4 fields 
Courtesy Paul Riseborough here: https://github.com/ArduPilot/ardupilot_wiki/issues/3641#issuecomment-913577132
 2021-09-08 17:06:12 +10:00
Randy Mackay 63e579d738 AP_NavEKF3: add using_extnav_for_yaw 2021-08-31 09:20:17 +10:00
Randy Mackay 0edfd2634f AP_NavEKF3: rename using_external_yaw to using_noncompass_for_yaw 2021-08-31 09:20:17 +10:00
Randy Mackay d1f2acd813 AP_NavEKF3: rename varInnovOptFlow to flowVarInnov 
also renamed innovOptFlow to flowInnov
 2021-08-24 16:49:04 +09:00
Randy Mackay 85ade10e85 AP_NavEKF3: ofDataNew made local 2021-08-24 16:49:04 +09:00
Randy Mackay 11847cfcf5 AP_NavEKF3: always calculate optical flow innovations and variances 2021-08-24 16:49:04 +09:00
Randy Mackay 914a8dca49 AP_NavEKF3: for loops use uint8_t instead of unsigned 2021-08-24 16:49:04 +09:00
Randy Mackay 5779ebd177 AP_NavEKF3: remove unused Tbn_flow 2021-08-24 16:49:04 +09:00
Randy Mackay f9fd63e01e AP_NavEKF3: remove unused optflow calcs 2021-08-24 16:49:04 +09:00
TunaLobster d6a5622fcb AP_NavEKF3: Remove @RebootRequired: False 2021-08-19 10:00:16 +10:00
Andrew Tridgell 5c86cc6828 AP_NavEKF3: added EK3_PRIMARY parameter 
allows for selection of which IMU to use on startup
 2021-08-17 06:42:42 +10:00
Pierre Kancir 8216905f47 AP_NavEKF3: remove unecessary assignements 2021-08-12 10:39:49 +09:00
Randy Mackay 2a2cde68ef AP_NavEKF3: skip GSF reset count check if source actively changed 
also only fail all compass on emergency reset
 2021-08-10 09:44:57 +10:00
Andrew Tridgell ff59e0f72f AP_NavEKF3: fixed output LLH to account for IMU offset 
thanks to Paul and Randy
 2021-08-09 19:19:21 +10:00
Randy Mackay 2f1444772b AP_NavEKF3: XKF3.IYAW logs in degrees 2021-08-09 08:10:42 +09:00
Randy Mackay d961186e0c AP_NavEKF3: remove unused EK3_GSF_DELAY param 2021-08-06 07:00:46 +09:00
Andrew Tridgell 8681ecebfd AP_NavEKF3: mark log messages as streaming 2021-08-03 10:23:36 +10:00
Peter Barker c34284b6eb AP_NavEKF3: stop using AHRS as conduit for Compass pointer 2021-07-30 12:19:42 +10:00
Paul Riseborough 17ead96250 AP_NavEKF3: Revert IMU and wind speed process noise parameter defaults 
These give noisier state estimates, but are more robust to rapid changes in IMU biases.
TODO implement a means of using the modified parameters when there are more than one EKF instance running with IMU's that are sampling at a higher rate.
 2021-07-22 18:20:45 +10:00
Paul Riseborough aa6ac4a874 AP_NavEKF3: retune wind process noise for better airspeed fault detection 2021-07-22 18:20:45 +10:00
Paul Riseborough 8fd1e98701 AP_NavEKF3: Fix bug preventing copter wind estimation at low speed 
Also re-tunes process noise default for smoother wind velocity state estimates.
 2021-07-22 18:20:45 +10:00
Paul Riseborough 0088b0f3fe AP_NavEKF3: Revert EK3_BETA_MASK parameter extension 
These are not required due to use of bit 7 in FLIGHT_OPTIONS to achieve the same function.
 2021-07-22 18:20:45 +10:00
Paul Riseborough 59d31cc7d5 AP_NavEKF3: Rework non-airspeed wind estimation 
Faster wind estimation when not using airspeed with acceptable noise in wind velocity estimates.
 2021-07-22 18:20:45 +10:00
Paul Riseborough 5fa3ed5755 AP_NAvEKF3: use #define value for bad IMU hold time 2021-07-22 18:20:45 +10:00
Paul Riseborough 7497590363 AP_NavEKF3: Increase lower state variance limit when vibration affected 
This makes state corrections from GPS and baro observations more aggressive
 2021-07-22 18:20:45 +10:00
Paul Riseborough 3e123c0a30 AP_NavEKF3: Use sensor variance when checking for bad IMU 2021-07-22 18:20:45 +10:00
Paul Riseborough e3bdbcd8ea AP_NavEKF3: Make bad IMU status more persistent 2021-07-22 18:20:45 +10:00
Paul Riseborough ccc95d8726 AP_NavEKF3: Add accessor function for vibration affected status 2021-07-22 18:20:45 +10:00
Paul Riseborough ed61287410 AP_NavEKF3: Don't update accel bias states if vibration affected 2021-07-22 18:20:45 +10:00
Paul Riseborough 62d70a628e AP_NavEKF3: Use large accel process noise when IMU data is bad 2021-07-22 18:20:45 +10:00
Paul Riseborough 5eb7751682 AP_NavEKF3: Adjust gyro bias process noise tuning 
NEw value is a compromise between roll/pitch angle and horizontal state velocity estimation errors and the noise in the gyro bias estimate
 2021-07-22 18:20:45 +10:00
Paul Riseborough 72dc998509 AP_NavEKF3: Allow smaller dvel bias state variances for improved tuning 2021-07-22 18:20:45 +10:00
Paul Riseborough 0f2661c31c AP_NavEKF3: Retune IMU process noise 
Required to achieve equivalent fusion noise and weighting on IMU vs other sources to previous param defaults with the old covariance prediction equations.
 2021-07-22 18:20:45 +10:00
Paul Riseborough 171eed5d85 AP_NavEKF3: Make gyro bias learning less noisy 2021-07-22 18:20:45 +10:00
Paul Riseborough ce4d13091a AP_NavEKF3: Fix bug preventing learning of XY IMU dvel bias in flight 2021-07-22 18:20:45 +10:00
Paul Riseborough 6242ce19fa AP_NavEKF3: Change powf(x,2) to sq(x) 2021-07-22 18:20:45 +10:00
Paul Riseborough bb9eed28a9 AP_NavEKF3: Update covariance prediction equations 2021-07-22 18:20:45 +10:00
Paul Riseborough 7b8e935880 AP_NavEKF3: Use alternate form for quaternion to rotmat equations in derivation 2021-07-22 18:20:45 +10:00
Peter Barker 795f412264 AP_NavEKF3: pass NavEKF failures back up to callers 2021-07-21 18:02:26 +10:00
Andrew Tridgell fc2118f42b AP_NavEKF3: process GPS yaw independently of GPS fix 
this processes GPS yaw with its own timestamp and as a separated step
from fusing position and velocity. This makes the yaw time handling
more accurate as yaw for moving baseline GPS comes in as a separate
piece of data from the position and velocity
 2021-07-21 17:59:49 +10:00
Andrew Tridgell 0b9cde5812 AP_NavEKF3: fixed indentation in readGpsData() 2021-07-21 17:59:49 +10:00
Peter Barker a4410a4b2e AP_NavEKF3: log EKF data source set in XKFS 2021-07-21 16:31:53 +10:00
Andrew Tridgell 6b73c2151a AP_NavEKF3: implement moving origin 
this shifts EKF_origin to the current location at 1Hz, while leaving
public_origin alone. All output APIs and logging are relative to
public_origin.

The effect of this change is to remove the distortion caused by a
spherical earth, which allows the EKF to operate without errors at
very long distances from the public_origin.
 2021-07-14 17:34:40 +10:00
Andrew Tridgell 98fb4fcbe7 AP_NavEKF3: convert code_gen.py to ftype 2021-07-12 17:27:08 +10:00
Andrew Tridgell 44f098c86d AP_NavEKF3: convert powF(xx,2) calls to sq(xx) 2021-07-12 17:27:08 +10:00
Andrew Tridgell ae8dbe36bb AP_NavEKF3: convert EKF3 derivation to ftype 2021-07-12 17:27:08 +10:00
Andrew Tridgell 5319e3910f AP_NavEKF3: moved checkUpdateEarthField to be called less often 2021-07-10 07:20:41 +10:00
Andrew Tridgell a8c6d742aa AP_NavEKF3: update earth field at 1Hz 
this prevents large mag errors on long distance flights
 2021-07-10 07:20:41 +10:00
Andrew Tridgell 885e518741 AP_NavEKF3: allow for double EKF build 2021-07-10 07:20:41 +10:00
Randy Mackay 4fde26aa01 AP_NavEKF3: EK3_RNG_USE_HGT param references EK3_SRCx_POSZ 2021-07-05 08:42:06 +09:00
Paul Riseborough 1281033931 AP_NavEKF3: Remove unused class variable rngBcnTimeout 2021-06-23 13:26:02 +09:00
Paul Riseborough 9d85a4292e AP_NavEKF3: Ensure postion timeout flag and timer is always reset 2021-06-23 13:26:02 +09:00
Paul Riseborough de3c6d6e5c AP_NavEKF3: Fade each vert vel variance clip count over 1 second 2021-06-23 13:26:02 +09:00
Paul Riseborough ac92182153 AP_NavEKF3: Clean up initialisation of boolean array 2021-06-23 13:26:02 +09:00
Paul Riseborough b0763f04f1 AP_NavEKF3: Remove unwanted line 2021-06-23 13:26:02 +09:00
Paul Riseborough b7aad13cc8 AP_NavEKF3: Protect against collapse of velocity and position variances 2021-06-23 13:26:02 +09:00
Paul Riseborough 36160ba9ce AP_NavEKF3: Fix bug preventing horizontal position reset if badIMUdata 2021-06-23 13:26:02 +09:00
Paul Riseborough 5d00b7d042 AP_NavEKF3: Fix bug preventing height reset if badIMUdata 2021-06-23 13:26:02 +09:00
Paul Riseborough e4eb8339d0 AP_NavEKF3: Fix bug preventing velocity reset if badIMUdata 2021-06-23 13:26:02 +09:00
Josh Henderson 64dc3bbe41 AP_NavEKF3: Fix #17789 core's ekf origin altitude different if flying 2021-06-22 12:01:10 +10:00
Josh Henderson 0ae3730f11 AP_NavEKF3: non_GPS modes ensure EKF origin set only once and stays in sync 
ekf3
 2021-06-22 12:01:10 +10:00
Peter Barker d6348a0786 AP_NavEKF3: remove getBodyFrameOdomDebug 
Not used after we moved logging to be within AP_NavEKF3
 2021-06-07 09:28:52 +10:00
Peter Barker dd3ab29b2f AP_NavEKF3: remove getFilterGpsStatus 
Not needed after we moved logging into NavEKF3
 2021-06-07 09:25:53 +10:00
Siddharth Purohit cd5b764fd8 AP_NavEKF3: use first usable compass index to set magSelectIndex 2021-06-02 17:10:19 +10:00
Paul Riseborough a5a25411da AP_NavEKF3: Remove unnecessary baro limiting 2021-06-02 11:13:16 +09:00
Paul Riseborough 124f016e5b AP_NavEKF3: Use parameter to set baro ground effect dead-zone 2021-06-02 11:13:16 +09:00
Paul Riseborough 76d0dcc25c AP_NavEKF3: Use common method for handling baro ground effect 2021-06-02 11:13:16 +09:00
Andrew Tridgell dc9435a88d AP_NavEKF3: don't limit baro change when we are in fixed wing mode 2021-06-02 11:13:16 +09:00
Peter Barker c00f110f3d AP_NavEKF3: use DAL APIs for takeoff/touchdown expected 2021-06-02 11:13:16 +09:00
Peter Barker 15658362b5 AP_NavEKF3: make time-horizon OF data a local variable 
Saves 40 bytes of RAM per core on stm32
 2021-06-01 09:56:19 +10:00
Randy Mackay 02f6ca51bc AP_NavEKF3: init rngOnGnd to 5cm to avoid div-by-zero 2021-05-28 08:08:08 +09:00
Paul Riseborough 9014afc9d4 AP_NavEKF3: Fix typo in comment 2021-05-11 10:37:08 +10:00
Paul Riseborough b9abef37c3 AP_NavEKF3: Reset to GPS yaw if fusion times out when on ground. 2021-05-11 10:37:08 +10:00
Peter Barker f4591faeed AP_NavEKF3: simplify taking of GPS measurements 2021-03-23 15:11:33 +11:00
Paul Riseborough 1018801522 AP_NavEKF3: White space and comment fixes 2021-03-23 10:05:59 +11:00
Paul Riseborough 7113387d27 AP_NavEKF3: Use better defined data type 2021-03-23 10:05:59 +11:00
Paul Riseborough ac87cab6bc AP_NavEKF3: constify array index variable 2021-03-23 10:05:59 +11:00
Paul Riseborough 1498b516a3 AP_NavEKF3: Don't try to learn gyro biases that are poorly observable 2021-03-23 10:05:59 +11:00
Paul Riseborough 44be7161c0 AP_NavEKF3: Reduce yaw drift when operating without external aiding 
Also fixes bug in the determination of the total angular variance threshold for when to fuse a zero innovation yaw measurement.
 2021-03-23 10:05:59 +11:00
Paul Riseborough 53c4b163ce AP_NavEKF3: Allow adjustment of on ground not moving test sensitivity 
Also re-tune default sensitivity based on user supplied logs with noisy gyro data.
 2021-03-23 10:05:59 +11:00
Paul Riseborough e7b08c1ffc AP_NavEKF3: Update log message format description 2021-03-23 10:05:59 +11:00
Paul Riseborough 918606e71d AP_NavEKF3: Don't use fake measurements to learn dvel bias 2021-03-23 10:05:59 +11:00
Paul Riseborough c709ad9c80 AP_NavEKF3: Add missing axis specific dvel bias update inhibit 2021-03-23 10:05:59 +11:00
Paul Riseborough 073e273732 AP_NavEKF3: Don't allow yaw alignment until tilt alignment completed 2021-03-23 10:05:59 +11:00
Paul Riseborough a07427fd30 AP_NavEKF3: Don't learn poorly observed IMU dvel bias states before flight 2021-03-23 10:05:59 +11:00
priseborough 4b1c334bba AP_NavEKF3: improve stability of co-variance matrix processing 
This patch prevents the delta velocity bias state variances collapsing due to insufficient process noise and causing bad bias estimates to form.
 2021-03-23 10:05:59 +11:00
murata c5b1c832ba AP_NavEKF3: Change misnomer (NFC) 2021-03-15 18:21:15 +11:00
Peter Barker 4605870788 AP_NavEKF3: remove separate calls to get delta-times for vel and ang 2021-03-13 11:29:29 +11:00
Paul Riseborough e3eea0a54a AP_NavEKF3: Use specialised function for in-flight plane yaw alignment 2021-03-05 12:10:01 +11:00
Paul Riseborough 4675aea0bf AP_NavEKF3: Update parameter description 2021-03-05 12:10:01 +11:00
Paul Riseborough 246b80dc06 AP_NavEKF3: Don't return a 0,0 lat,lng unless absolutely necessary 2021-03-05 12:10:01 +11:00