Commit Graph

399 Commits

Author SHA1 Message Date
Paul Riseborough 4c72a14e22 AP_NavEKF2: Add function to LPF and spike filter baro data 2015-11-18 11:18:17 +11:00
Paul Riseborough 34311bedfa AP_NavEKF2: Add data buffers for range finder data 2015-11-18 11:18:17 +11:00
Andrew Tridgell 99da195e37 AP_NavEKF2: make IMU buffer length depend on main loop rate
this fixes a problem with Replay and baro data
2015-11-18 10:20:39 +11:00
Paul Riseborough 9b82b2200c AP_NavEKF2: Fix plane in-flight yaw reset
The copter method was being used for plane and the plane method was not being run due to the change in flight status not being detected.
The plane reset method did not trigger if the EKF had already dragged the velocity states along with the GPS or could align to an incorrect heading.
The method has been reworked so that it resets to the GPS course, but only if there are inconsistent angles and large innovations.
To stop a failed magnetometer causing a loss of yaw reference later in flight, if all available sensors have been tried in flight and timed out, then no further magnetoemter data will be used
2015-11-16 09:05:42 +11:00
Paul Riseborough e8706db382 AP_NavEKF2: Update IMU tuning parameter limits 2015-11-16 09:05:42 +11:00
Paul Riseborough 0562529729 AP_NavEKF2: Tuning changes to make attitude less sensitive to GPS and compass errors 2015-11-16 09:05:42 +11:00
Paul Riseborough 6522fb2621 AP_NavEKF2: Allow user to relax pre-flight GPS checks 2015-11-12 20:39:15 +11:00
Paul Riseborough 0b653bb82b AP_NavEKF2: Update MAVLnk parameter documentation 2015-11-11 15:16:36 +11:00
Paul Riseborough ca31ced2b4 AP_NavEKF2: Fix bug preventing use of optical flow with multiple IMU's 2015-11-10 18:17:16 +11:00
Paul Riseborough 577670ccee AP_NavEKF2: Reduce memory required by 6KB when running at 400Hz
Down-sample the IMU and output observer state data to 100Hz for storage in the buffer.
This reduces storage requirements for Copter by 75% or 6KB
It does not affect memory required by plane which already uses short buffers due to its 50Hz execution rate.
This means that the EKF filter operations operate at a maximum rate of 100Hz.
The output observer continues to operate at 400Hz and coning and sculling corrections are applied during the down-sampling so there is no loss of accuracy.
2015-11-10 15:51:18 +11:00
Paul Riseborough e33aa7898a AP_NavEKF2: Prevent return of uninitialised variable 2015-11-09 22:30:38 +11:00
Paul Riseborough 3d8e74df26 AP_NavEKF2: Don't switch magnetometers when on the ground or just started
Large magnetometer innovations on the ground could be caused by factors that will disappear when flying, eg:

a) Bad initial gyro bias
b) External magnetic field disturbances (adjacent metal structures, placement of hatches with magnets, etc)

To avoid unnecessary switches, we inhibit switching until off-ground and when sufficient time has lapsed from power on to learn gyro bias offsets.
2015-11-09 22:07:10 +11:00
Paul Riseborough 3099d94e78 AP_NavEKF2: Retrieve correct time-stamp for active compass 2015-11-09 22:07:10 +11:00
Paul Riseborough 5d2f78996a AP_NavEKF2: Remove un-used data in IMU buffer
Recovers 416 Bytes of memory per EKF2 instance for Copter
2015-11-09 22:07:10 +11:00
Paul Riseborough f00b1ff22d AP_NavEKF2: Publish the magnetometer selection index 2015-11-09 22:07:10 +11:00
Paul Riseborough 7294c8004b AP_NavEKF2: Enable use of backup magnetometers after a timeout
If the magnetometer fails innovation consistency checks for too long (currently 10 sec), then the next available sensor approved for yaw measurement will be used.
2015-11-09 22:07:09 +11:00
Paul Riseborough 6deabe28c2 AP_NavEKF2: Require all magnetometer axes to pass innovation test
The original design intent was to require all axes to pass because severe errors are rarely constrained to a single axis.
This was not achieved with the previous implementation.
These changes move the innovation consistency checks for all three axes to the top before any axes are fused.
Unnecessary performance timers have been removed.
2015-11-09 22:07:09 +11:00
Paul Riseborough afeadfca51 AP_NavEKF2: Don't attempt to compensate for external mag calibration
This was problematic to implement with magnetometer switching. It is likely that slow magnetometer learning can still be performed externally (eg plane) but this will need to be monitored to see if it causes issues.
2015-11-09 22:07:09 +11:00
Paul Riseborough f08a4af751 AP_NavEKF2: Remove redundant if statement
Thank you to OXINARF for picking up this one
2015-11-08 17:06:57 +11:00
Paul Riseborough 9efc2152fc AP_NavEKF2: Fix comment 2015-11-08 16:26:04 +11:00
Paul Riseborough a8983d075f AP_NavEKF2: Enable clean entry into GPS aiding in-flight
The setting of the EKF origin and the entry into GPS aiding mode have been separated to make the logic clear.
The order of operations has been changed to ensure that when a reset to GPS is performed, a valid GPS measurement is available in the buffer
Declaration of GPS availability is not made unless the GPS data has been entered into the buffer
2015-11-08 16:26:04 +11:00
Paul Riseborough f99dbc70f9 AP_NavEKF2: Don't return ready to use GPS true if user has inhibited GPS 2015-11-08 16:26:04 +11:00
Paul Riseborough d6f7156f4e AP_NavEKF2: Fix timing offset in position reset calculation
the correction for GPS latency now uses the correct time for that observation
2015-11-08 16:26:04 +11:00
Paul Riseborough 0b64ad0123 AP_NavEKF2: Enable EKF instance to be specified when requesting public data
Only applied to interfaces required for data logging.
If an invalid instance is requested, the data for the primary instance is returned. This allows the primary data to be returned by calling with a -1 instance value.
2015-11-08 15:37:28 +11:00
Paul Riseborough 6c2dc3ccf8 AP_NavEKF2: Publish the number of instances 2015-11-08 15:37:27 +11:00
Paul Riseborough 65e4a4ab94 AP_NavEKF2: Use correct casting of integers when printing
Changes in response to review comments
2015-11-08 15:37:27 +11:00
Paul Riseborough 2dcaeb0304 AP_NavEKF2: Update publishing of primary core index
Changes made in response to review comments
2015-11-08 15:37:27 +11:00
Paul Riseborough 1858da8307 AP_NavEKF2: Better switching in response to faults
Make selection sticky
If fault detected or unhealthy, then switch to healthy core with lowest fault score.
If no healthy core found, do not switch.
2015-11-08 15:37:27 +11:00
Paul Riseborough 5f6d1d8d25 AP_NavEKF2: Add fault score calculation 2015-11-08 15:37:27 +11:00
Paul Riseborough b24507d33c AP_NavEKF2: Publish the primary EKF index 2015-11-08 15:37:27 +11:00
Paul Riseborough 04165a60a7 AP_NavEKF2: Reduce false positive on EKF health check
Apply filtering to baro innovation check and and don't apply innovation checks once aiding has commenced because GPS and baro disturbances on the ground and during launch could generate a false positive
2015-11-08 15:37:27 +11:00
Paul Riseborough 49f9ea317c AP_NavEKF: Update console message and param descriptions for multiple EKF's 2015-11-08 15:37:26 +11:00
Paul Riseborough 2340e18fdc AP_NavEKF2: Offset the fusion time horizon between multiple instances
Prevents frame over-runs due to simultaneous fusion of measurements on each instance.
The offset is only applied if less than 5msec available between frames
2015-11-08 15:37:26 +11:00
Paul Riseborough 3eeff8dbc6 AP_NavEKF2: Remove unused code
This method of correcting for the fusion time horizon delay was too computationally expensive for our application and did not smooth fusion noise.
2015-11-08 15:37:26 +11:00
Paul Riseborough d48454ee2d AP_NavEKF2: Use nominated IMU unless unavailable
We now run a separate instance of the EKF for each IMU, so input data fusion of IMU's is no longer required.
2015-11-08 15:37:26 +11:00
Andrew Tridgell d52279af27 AP_NavEKF2: don't try to allocate last bytes of memory to EKF2 2015-11-06 10:42:58 +11:00
Andrew Tridgell ee78e2d618 AP_NavEKF2: set primary to first healthy core 2015-11-06 10:42:58 +11:00
Andrew Tridgell 2ab2afc86a AP_NavEKF2: added EK2_IMU_MASK for multiple IMUs
no voting between multiple IMUs yet
2015-11-06 10:42:58 +11:00
Lucas De Marchi e0e7b73ceb AP_NavEKF2: remove checks for HAL_BOARD_APM2 and HAL_BOARD_APM1 2015-11-04 12:14:12 +11:00
Paul Riseborough aa14de9d39 AP_NavEKF2: Fix failure to start mag cal due to gyro noise
Vibration in the 400Hz delta angles could cause the angular rate condition check for in-flight magnetic field alignment to fail.
The symptons were failure to start magnetic field learning as expected when EK2_MAG_CAL=3 was set.
2015-11-02 14:12:17 +11:00
Paul Riseborough 2ebce110b7 AP_NavEKF2: Explicitly define plane build type for default parameters
Use Copter parameters if build type is unknown
2015-11-02 14:12:17 +11:00
Paul Riseborough b6d63d4b4e AP_NavEKF2: Fix reporting of pre-flight GPS checks
Re-order checks so that that less important messages are not hidden when the 40 character buffer overflows
Add required output methods
2015-11-02 14:12:16 +11:00
Paul Riseborough 7bd61a484c AP_NavEKF2: Faster initial accel bias learning 2015-11-02 14:12:16 +11:00
Paul Riseborough b15bf3243e AP_NavEKF2: Remove potential for division by zero 2015-10-30 15:34:26 +09:00
Paul Riseborough 5533a9a149 AP_NavEKF2: Add improved health monitoring when using simple compass yaw fusion 2015-10-30 15:34:23 +09:00
Paul Riseborough f539b597a3 AP_NavEKF2: Improve initialisation of magnetic field learning
Use the more robust, but less accurate compass heading fusion up to 5m altitude
Wait for the magnetometer data fusion time offset to be correct before using data to reset states
Don't reset magnetic field states if the vehicle is rotating rapidly as timing offsets will produce large errors
When doing the yaw angle reset, apply the reset increment to all quaternions stored in the output buffer to avoid transients produced by yaw rotations and the 0.25 second fusion time horizon offset.
Only do the one yaw and mag reset at 5m, not two at 1.5 and 5.0m
Always re-do the yaw and mag reset when leaving the ground.
2015-10-30 15:34:20 +09:00
Paul Riseborough 844ed95718 AP_NavEKF2: Add method to rotate output quaternion history 2015-10-30 15:34:17 +09:00
Lucas De Marchi 831d8acca5 Remove use of PROGMEM
Now variables don't have to be declared with PROGMEM anymore, so remove
them. This was automated with:

    git grep -l -z PROGMEM | xargs -0 sed -i 's/ PROGMEM / /g'
    git grep -l -z PROGMEM | xargs -0 sed -i 's/PROGMEM//g'

The 2 commands were done so we don't leave behind spurious spaces.

AVR-specific places were not changed.
2015-10-30 14:35:16 +09:00
Lucas De Marchi 2c38e31c93 Remove use of PSTR
The PSTR is already define as a NOP for all supported platforms. It's
only needed for AVR so here we remove all the uses throughout the
codebase.

This was automated with a simple python script so it also converts
places which spans to multiple lines, removing the matching parentheses.

AVR-specific places were not changed.
2015-10-30 14:35:04 +09:00
Randy Mackay 4d458833dc AP_NavEKF2: remove unnecessary PV_AidingMode check
Thanks to OXINARF for catching this
2015-10-30 12:52:49 +09:00
Paul Riseborough b459d937ad AP_NavEKF2: Clean up GPS fusion timeout logic and comments 2015-10-30 12:24:19 +09:00
Randy Mackay 94adaba305 AP_NavEKF2: constify getLastPosNorthEastReset
Also constify getLastVelNorthEastReset
2015-10-30 12:24:16 +09:00
Randy Mackay 52ed075405 AP_NavEKF2: constify getLastYawResetAngle 2015-10-30 12:24:12 +09:00
Paul Riseborough 0b1a6a2157 AP_NavEKF2: Clean up GPS timeout logic 2015-10-30 12:24:06 +09:00
Paul Riseborough 74da4d8e57 AP_NavEKF2: Remove GPS glitch offset logic
Correction for steps in position and velocity caused by resets following GPS glitches and other events are now handled by the control loops.
2015-10-30 12:24:04 +09:00
Paul Riseborough 4fdec67546 AP_NavEKF2: Publish the position and velocity state reset deltas
Used by the control loops to compensate for step changes in position and velocity when the EKF needs to do a reset of these states.
2015-10-30 12:24:02 +09:00
Andrew Tridgell c228ea4371 AP_NavEKF2: prevent a valgrind error on startup 2015-10-26 11:34:32 +11:00
Paul Riseborough 87ea9acc7f AP_NavEKF2: Fix mavlink parameter label 2015-10-26 08:05:15 +11:00
Paul Riseborough 1cf626692c AP_NavEKF: Reduce impact of altimeter flow disturbance error on Copter alt hold
This increase in assumed altimeter noise and reduction in accel noise has been flight tested by L.Hall with noticeable reduction in the immediate response to Baro errors during moving flight.
This increases the time constant of response to baro errors such that the pilot can more easily compensate.
2015-10-26 08:05:15 +11:00
Paul Riseborough e692e30988 AP_NavEKF2: Reduce allowance for magnetometer timing errors
The previous gain from rate to magnetometer error was excessive. The revised value is equivalent to a magnetic field length of 0.5 with a timing uncertainty of 0.01 sec
2015-10-26 08:05:15 +11:00
Paul Riseborough 4c5ba60578 AP_NavEKF2: Remove dead code 2015-10-26 08:05:15 +11:00
Paul Riseborough 55ac8f0230 AP_NavEKF2: Update parameter values.
Testing on different platforms has shown that the new EKF has smaller innovations enabling innovation consistency checks that reject GPS and baro errors to be tightened.
The position and velocity thresholds for plane have been left the same because planes are less sensitive to GPS glitches as they fly higher and with more separation to surrounding objects. They are also more prone to bad inertial data due to the installation practices.
The altitude noise has been increased on plane to allow for the larger baro disturbances that result from the higher speeds and lack of a proper static pressure source. The innovation consistency gate has been adjusted to provide the same baro error limit of ~20m before baro is rejected.
2015-10-24 07:26:50 +11:00
Paul Riseborough 1e7ac873b9 AP_NavEKF2: Improve handling of GPS loss and recovery for planes
Extended GPS loss can result in the earth field states becoming  rotated and making it difficult for the EKF to recover its heading when GPS is regained.
During prolonged GPS outages, the position covariance can become large enough to cause the reset function to continually activate. This is fixed by ensuring that position covariances are always reset when the position is reset.
The innovation variance was being used incorrectly instead of the state variance to trigger the glitch reset.
2015-10-24 07:17:11 +11:00
Paul Riseborough cd5ec3a3e0 AP_NavEKF2: Reduce angle errors when flying without GPS
Turn off aiding during >1g manoeuvres when not using GPS
Use larger velocity and position uncertainties when flying without GPS
2015-10-23 19:04:30 +11:00
Paul Riseborough 1eaf318b9b AP_NavEKF2: Faster learning of gyro scale factors 2015-10-23 19:04:30 +11:00
Paul Riseborough a2f5962f77 AP_NavEKF2: Reduce effect of baro disturbances 2015-10-23 19:04:30 +11:00
Paul Riseborough 5eb7cf1fbf AP_NavEKF: Reduce roll/pitch disturbance when magnetic field is reset
Because we have changed the yaw angle and have taken a point sample on the magnetic field, covariances associated with the magnetic field states will be invalid and subsequent innovations could cause an unwanted disturbance in roll and pitch.
The reset of the Euler angles to a new yaw orientation was being done using roll and pitch from the output observer states, not the EKF state vector which meant that when roll and pitch were changing, the reset to a new yaw angle would also cause a roll and pitch disturbance.
2015-10-23 19:04:30 +11:00
Paul Riseborough b08817554e AP_NavEKF2: Ensure consistent position and velocity fusion rates when not using GPS
This sets the fusion of the synthetic position and velocity to occur at the same time as the barometer

This makes filter tuning more consistent between GPS and non-GPS useage
2015-10-21 17:27:00 +11:00
Paul Riseborough 1c347e8859 AP_NavEKF: Prevent high measurement data rates from overflowing buffers
High measurement data rates can fill buffers with data that is always new and never fused because it is over-written before it falls behind the measurement time horizon.
2015-10-21 17:27:00 +11:00
Paul Riseborough d1a090dda8 AP_NavEKF: Fix bug fetching data from measurement buffers
This bug can result in valid data being rejected and fused at the wrong time horizon.
2015-10-21 17:27:00 +11:00
Paul Riseborough aabb9b4e02 AP_NavEKF2: handle uncertain build type 2015-10-21 17:27:00 +11:00
Paul Riseborough e6312d91ce AP_NavEKF2: Correct variable name 2015-10-21 17:27:00 +11:00
Paul Riseborough 4640673cb1 AP_NavEKF2: Fix bug causing incorrect fusion timing 2015-10-21 17:27:00 +11:00
Paul Riseborough cd8b9c7d26 AP_NavEKF: prevent high rate mag data locking out other data fusion 2015-10-20 20:16:04 +11:00
Paul Riseborough ab8c28a7cc AP_NavEKF: Fix bug allowing takeoff in GPS modes without aiding
The legacy EKF switches GPs aiding on on arming, whereas the new EKF switches it on based on GPS data quality.
This means the decision to arm and therefore the predicted solution flags must now reflect the actual status of the navigation solution as it will no longer change when motor arming occurs.
2015-10-20 20:16:00 +11:00
Paul Riseborough e076ed7f66 AP_NavEKF2: Remove compiler warning message 2015-10-20 18:16:16 +11:00
Andrew Tridgell cb0f7cb370 NavEKF2: use new perf counter API 2015-10-20 18:16:15 +11:00
Paul Riseborough 60c2e81d19 AP_NavEKF2: Apply optimisations to declination fusion covariance update
These are the same type of optimisations that were successful with the magnetometer fusion
2015-10-20 15:21:41 +11:00
Paul Riseborough 0054291cf4 AP_NavEKF2: Apply optimisations to side-slip fusion covariance update
These are the same optimisations that were successful with the magnetometer fusion
2015-10-20 15:21:40 +11:00
Paul Riseborough 5e4bc4e954 AP_NavEKF2: Apply optimisations to airspeed fusion covariance update
These are the same optimisations that were successful with the magnetometer fusion
2015-10-20 15:21:40 +11:00
Paul Riseborough a29147d6d2 AP_NavEKF2: Apply optimisations to optical flow covariance update
These are the same optimisations that were successful with the magnetometer fusion
2015-10-20 15:21:40 +11:00
Paul Riseborough b5e43288d4 AP_NavEKF2: Down to 12 from 14 usec for perf test[8] 2015-10-20 15:21:40 +11:00
Paul Riseborough 0f530bb5a0 AP_NavEKF2: Correct comments 2015-10-20 15:21:40 +11:00
Andrew Tridgell d1dfd5fd01 AP_NavEKF2: use common header for optimisation level and irq disable 2015-10-20 15:21:40 +11:00
Andrew Tridgell a017ae7e00 AP_NavEKF2: down to 218us for test[9] 2015-10-20 15:21:40 +11:00
Andrew Tridgell fc23be8025 AP_NavEKF2: enable fine grained perf tuning for mag fusion 2015-10-20 15:21:40 +11:00
Andrew Tridgell b6c1352e4c AP_NavEKF2: added 10 test perf counters
used for fine grained performance tuning
2015-10-20 15:21:40 +11:00
Paul Riseborough 824436dfb6 AP_NavEKF2: Explicitly define constants as floats 2015-10-20 15:21:40 +11:00
Paul Riseborough 2fbd050418 AP_NavEKF2: Use blended accelerometer data
If high vibration levels cause offsets between the two, it switches to the accelerometer with lower vibration levels. The default behaviour is to use the average of both accelerometers.
2015-10-20 15:21:40 +11:00
Paul Riseborough 2b13020c19 AP_NavEKF2: Fix bug in vertical position derivative calculation 2015-10-20 15:21:39 +11:00
Paul Riseborough f6ad79688e AP_NavEKF2: Update start sequence console messages 2015-10-20 15:21:39 +11:00
Paul Riseborough 1a1236f764 AP_NavEKF2: Update magnetometer fusion documentation 2015-10-20 15:21:39 +11:00
Paul Riseborough 8526a8ba7e AP_NavEKF2: Level processor loading between frames
Don't fuse other measurements on the same frame that magnetometer measurements arrive if running at a high frame rate as there will be insufficient time to complete other operations.
2015-10-20 15:21:39 +11:00
Paul Riseborough 225b81baf4 AP_NavEKF2: Prevent users breaking filter by setting excessive time delays
If time deelays greater than the IMU buffer length are used, then it is possible for measurements to be dropped.
2015-10-20 15:21:39 +11:00
Paul Riseborough a1d6c7ae1e AP_NavEKF2: Improve timing accuracy
This parameter is a compromise between numerical accuracy of the covariance prediction and sensor timing jitter
Further testing has shown that doing covariance prediction and sensor fusion every 10msec has no observable effect on fusion health and reduces timing hitter noise on magnetometer observations during high rate maneovures
2015-10-20 15:21:39 +11:00
Paul Riseborough e0ed2dab63 AP_NavEKF2: Adjust IMU FIFO buffer for different IMU data rates
The values chosen ensure that up to consistent 250 msec of sensor delay compensation is available for different platform types
The revised values also ensure that fusion occurs at different time to when the 10Hz magnetometer measurements are read
2015-10-20 15:21:39 +11:00
Paul Riseborough baa8692960 AP_NavEKF2: Allow use of magnetometer learning during optical flow nav
Adds fusion of the declination when there are no earth relative measurements so that the declination angle and therefore the copters yaw angle have an absolute reference.
This enables the length (but not the declination) of the earth field North/East states to change along with the magnetometer offsets.
2015-10-20 15:21:38 +11:00
Paul Riseborough 1b8a93ef0c AP_NavEKF2: Update function header comments 2015-10-20 15:21:38 +11:00
Paul Riseborough 6899767d28 AP_NavEKF2: Disable magnetic field learning if we have no absolute position reference 2015-10-20 15:21:38 +11:00
Paul Riseborough 242b9641c8 AP_NavEKF2: Fix in-air logic bug 2015-10-20 15:21:38 +11:00
Paul Riseborough e7de2d3ea3 AP_NavEKF: Update magnetic field learning options
Provide an option to always do learning
Make field learning decision logic clearer
Change defaults so that plane learns when airborne
Change defaults so that Rover does not learn (large external magnetic interference)
2015-10-20 15:21:38 +11:00
Paul Riseborough 495809f211 AP_NavEKF2: Allow magnetic field learning to be faster 2015-10-20 15:21:38 +11:00
Paul Riseborough 84a02efd52 AP_NavEKF2: Improve efficiency of Z magnetometer fusion 2015-10-20 15:21:37 +11:00
Paul Riseborough 35b08849f7 AP_NavEKF2: Reduce effect of rounding errors on covariance prediction 2015-10-20 15:21:37 +11:00
Paul Riseborough 4e928bf294 AP_NavEKF2: Fix bug preventing pre-takeoff reference measurements 2015-10-20 15:21:37 +11:00
Paul Riseborough 71c399674a AP_NavEKF2: Delay use of magnetic field states until off-ground
Magnetic interference whilst on the ground can adversely affect filter states. This patch ensures that the simpler and more robust magnetic heading observation method is used until the vehicle has cleared the ground.
2015-10-20 15:21:37 +11:00
Paul Riseborough 99c2dc41e0 AP_NavEKF2: Miscellaneous tuning changes 2015-10-20 15:21:37 +11:00
Paul Riseborough 47ae0f35f6 AP_NavEKF2: Make EKF2 PosDownDerivative interface follow coding conventions
Updates arising from peer review.
2015-10-20 15:21:37 +11:00
Paul Riseborough 27393855f1 AP_NavEKF2: Change assumed gyro calibration accuracy
If an external gyro calibration has been performed, we should assume that it has been done under static conditions
Otherwise it is pointless and we should allow the EKF to find its own gyro bias offsets.
2015-10-20 15:21:36 +11:00
Paul Riseborough 67a669fcdc AP_NavEKF2: Correct comments for height measurement 2015-10-20 15:21:36 +11:00
Paul Riseborough 0dc570b5a5 AP_NavEKF2: Improve optical flow takeoff detection logic
Ensure takeoff detect status goes to false when on ground
2015-10-20 15:21:36 +11:00
Paul Riseborough d3a6690e4f AP_NavEKF2: Fix bugs preventing use of optical flow navigation 2015-10-20 15:21:36 +11:00
Paul Riseborough 52fd369b2f AP_NavEKF2: Add methods to output and calculate vertical position derivative
This patch calculates a derivative of the vertical position (positive down).
The derivative is exposed via a public function.
2015-10-20 15:21:35 +11:00
Andrew Tridgell 2ae0811458 AP_NavEK2: fixed perf counter names for EKF2 2015-10-20 14:36:49 +11:00
Randy Mackay 35769035d4 AP_NavEKF2: resolve compiler warning related to init order 2015-10-15 20:03:05 +09:00
Paul Riseborough 0c61e09b70 AP_NavEKF2: Critical big fix - states not initialised
The failure to initialise the magnetometer bias states to zero can result in a large jump in yaw gyro bias and heading when a heading reset is performed.
2015-10-15 09:52:55 +11:00
Paul Riseborough e3013b493b AP_NavEKF2: Critical bug fix - perf counter not initialised 2015-10-15 09:48:13 +11:00
Paul Riseborough 20a3f9782e AP_NavEKF2: Add full set of selectable pre-flight GPS checks 2015-10-10 21:22:53 +09:00
Paul Riseborough db4dfce7b1 AP_NavEKF2: Add fix status to GPS check report message 2015-10-10 14:49:07 +09:00
Paul Riseborough 22920aafad AP_NavEKF2: Improve GPS status reporting 2015-10-10 14:48:59 +09:00
Paul Riseborough 1cb2220107 AP_NavEKF2: Critical Bugfix 2015-10-10 14:48:54 +09:00
Paul Riseborough f467a89fa3 AP_NavEKF2: Update comments for filter status output function 2015-10-10 14:48:52 +09:00
Paul Riseborough b142cc7fd2 AP_NavEKF2: Rename files and re-distribute content 2015-10-10 14:48:50 +09:00
Siddharth Bharat Purohit 1ce3276d74 AP_NavEKF2: split EKF control and output get functions from state specific libs 2015-10-10 14:48:48 +09:00
Siddharth Bharat Purohit 2e388fb2f9 AP_NavEKF2: split otp flow from PosVelNED 2015-10-10 14:48:46 +09:00
Siddharth Bharat Purohit 290ea0e1e8 AP_NavEKF2: split up EKF_core into different files 2015-10-10 14:48:44 +09:00
Paul Riseborough cde140354a AP_NavEKF2: Clean up control logic 2015-10-05 13:35:32 +09:00
Paul Riseborough f4db78fc11 AP_NavEKF2: Allow for larger gyro bias errors
MPU6000 data sheet indicates that variation on gyro ZRO across temperature range from -40 to +85 is +-20 deg/sec.
The limits on the gyro bias states have been increased to allow for this.
To enable the EKF to accommodate such large gyro bias values in yaw without the yaw error wrapping, leading to continual heading drift, an unwrap function has been applied to the compass heading error.
2015-10-05 13:35:29 +09:00
Paul Riseborough 325f4139fe AP_NavEKF2: Clean up mode change logic 2015-10-05 13:35:26 +09:00
Paul Riseborough ef624199f9 AP_NavEKF2: Enable GPS velocity fusion to be inhibited 2015-10-05 13:35:23 +09:00
Paul Riseborough 53e58f1075 AP_NavEKF2: Update default parameters
Updates from preliminary tuning in Replay
2015-09-25 19:22:56 +10:00
Paul Riseborough 2fb72b6e6a AP_NavEKF2: Clean up loss of GPS logic 2015-09-25 19:20:52 +10:00
Paul Riseborough df0eb9d9d7 AP_NavEKF2: Don't run GPS checks when not required 2015-09-25 19:20:52 +10:00
Paul Riseborough 1986af021f AP_NavEKF2: Remove un-used flight mode and duplicate variable 2015-09-25 19:20:52 +10:00
Paul Riseborough 7230472516 AP_NavEKF2: Adjust parameter defaults 2015-09-25 19:20:52 +10:00
Paul Riseborough 8bcedb228b AP_NavEKF2: Bring pre-flight GPS checks up to date with EKF1 2015-09-25 19:20:52 +10:00
Randy Mackay 015f700bc0 AP_NavEKF2: getLastYawResetAngle returns last reset time 2015-09-24 16:57:38 +09:00
Paul Riseborough 80e182f827 AP_NavEKF2: Update EKF2 data logging 2015-09-24 12:58:44 +10:00
Paul Riseborough 4acd6c129a AP_NavEKF2: Update parameters 2015-09-24 12:58:43 +10:00
Paul Riseborough 9c5e48e7e9 AP_NavEKF2: Remove unused variables and improve variable names 2015-09-24 12:58:43 +10:00
Paul Riseborough 4a7714e15d AP_NavEKF2: Remove unused parameters and improve naming consistency 2015-09-24 12:58:43 +10:00
Paul Riseborough 8afb26087d AP_NavEKF2: Remove unused function 2015-09-24 12:58:43 +10:00
Andrew Tridgell fe76662faf AP_NavEKF2: added set_enable() API 2015-09-23 18:55:12 +10:00
Paul Riseborough f270573acc AP_NavEKF2: Use library functions for quaternion corrections 2015-09-23 17:48:48 +10:00
Andrew Tridgell cbc62238a9 AP_NavEKF2: run astyle for reformatting 2015-09-23 17:29:28 +10:00
Andrew Tridgell 760dafbb9d AP_NavEKF2: added enabled() function 2015-09-23 12:09:26 +10:00
Andrew Tridgell b4555f30a5 AP_NavEKF2: added frontend calls to core code 2015-09-23 11:56:42 +10:00
Andrew Tridgell 3ac75aeffb AP_NavEKF2: added EK2_ENABLE parameter 2015-09-23 11:56:42 +10:00
Paul Riseborough f500474a86 AP_NavEKF2: initial import of new maths EKF 2015-09-23 09:51:14 +10:00