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77 Commits

Author SHA1 Message Date
Andrew Tridgell be6f3aed72 AHRS: added airspeed_estimate() function 
this allows the APM code to use an airspeed estimate for navigation
 2012-08-25 17:49:26 +10:00
Andrew Tridgell ba41612e7d AHRS: new functions to support APM_Control library 2012-08-22 12:42:37 +10:00
uncrustify f17b368e38 uncrustify libraries/AP_AHRS/AP_AHRS_HIL.h 2012-08-21 19:19:51 -07:00
uncrustify b6db467e3c uncrustify libraries/AP_AHRS/AP_AHRS.h 2012-08-21 19:19:51 -07:00
uncrustify b4571ca40b uncrustify libraries/AP_AHRS/AP_AHRS_MPU6000.h 2012-08-21 19:19:51 -07:00
uncrustify 2f0c7aeb92 uncrustify libraries/AP_AHRS/AP_AHRS_DCM.h 2012-08-21 19:19:51 -07:00
uncrustify 7dc3f26ce0 uncrustify libraries/AP_AHRS/AP_AHRS_DCM.cpp 2012-08-21 19:19:51 -07:00
uncrustify bc04ade2c1 uncrustify libraries/AP_AHRS/AP_AHRS_HIL.cpp 2012-08-21 18:59:34 -07:00
uncrustify d77b6e7f52 uncrustify libraries/AP_AHRS/AP_AHRS_MPU6000.cpp 2012-08-21 18:59:34 -07:00
uncrustify 4846ba119e uncrustify libraries/AP_AHRS/examples/AHRS_Test/AHRS_Test.pde 2012-08-21 18:59:13 -07:00
Andrew Tridgell 2b6af43c92 AHRS: removed AP_AHRS_Quaternion 
this AHRS backend is causing compiler errors with the Arduino build
environment on windows. The quaternion AHRS backend is currently not
being developed/supported anyway. We can resurrect it if someone wants
to start developing it again.
 2012-08-22 10:41:31 +10:00
Andrew Tridgell 6c0b7b7f53 AHRS: fixed duplicate gps_use variable in DCM 2012-08-21 20:17:03 +10:00
Andrew Tridgell cc0e8be85a AHRS: moved var_info[] into top level AP_AHRS class 2012-08-21 15:58:09 +10:00
Andrew Tridgell 89db3458c8 AHRS: added set_fast_gains() method 
this will be used by arducopter on the ground
 2012-08-21 15:38:06 +10:00
Andrew Tridgell 01ae8f8771 AHRS: check for bad values in the error before they can affect DCM 
this should fix the DCM renorm errors in autotest, probably caused by
bad climb rates
 2012-08-18 13:54:11 +10:00
Andrew Tridgell 7948b3aee7 AHRS: force an extra read of the compass on startup 
the first read from the compass can be bad. This ensures we have a
good value when getting the initial AHRS yaw.

Thanks to Randy and Jason for the bug report!
 2012-08-17 17:57:39 +10:00
Andrew Tridgell 41a974683e Quaternion: we no longer support acceleration in the GPS driver 
remove the linear acceleration compensation code
 2012-08-15 20:07:53 +10:00
Andrew Tridgell 44852276da AHRS: added ahrs.yaw_initialised() 
this allows the high level code to know if the AHRS driver has a
reliable yaw estimate
 2012-08-15 12:39:34 +10:00
Andrew Tridgell 562069cbd7 AHRS: avoid a compiler bug in quaternion code 
Having _wind in the AP_AHRS class causes a register allocation error
when building the Quaternion code with some versions of avr-gcc. Quite
bizarre.
 2012-08-13 11:08:10 +10:00
Andrew Tridgell fa1b72adc5 AHRS: use airspeed for wind in forward flight 
when not turning we can use the airspeed sensor directly to calculate
the wind speed.
 2012-08-12 10:54:25 +10:00
Andrew Tridgell 3a92509b18 AHRS: added AHRS_GPS_USE parameter 
this allows for the GPS to be disables for position updates, which
allows for testing dead-reckoning
 2012-08-11 22:06:03 +10:00
Andrew Tridgell 2c7ab7c659 AHRS: added wind estimation code 
this allows us to estimate the wind while we have GPS lock, then use
that estimate in the long term dead reckoning
 2012-08-11 22:06:03 +10:00
Andrew Tridgell 708280511c AHRS: added long-term dead-reckoning 
this uses airspeed (if available) or last GPS ground speed to update
our position estimate in AHRS
 2012-08-11 12:00:31 +10:00
Andrew Tridgell e48b0f8558 AHRS: make airspeed sensor available to AHRS 
this will be used for long term dead-reckoning
 2012-08-11 08:57:32 +10:00
Andrew Tridgell d3cc6e5fab ACM: fixed HIL build 2012-08-11 08:34:16 +10:00
Jason Short 4e001286a6 AHRS DCM: FOrmatting 2012-08-09 16:59:43 -07:00
Andrew Tridgell 7be604cffd AP_Param: update AHRS for new constructor syntax 2012-08-08 12:11:57 +10:00
rmackay9 9a558be53e AP_AHRS_MPU6000: cleaning up compiler warning due to unused yaw_deltat variable 2012-07-28 16:23:25 +09:00
rmackay9 a49454e905 AP_AHRS: updated test sketch to allow use of MPU6000's DMP 2012-07-28 14:27:26 +09:00
rmackay9 0820ebddb9 AP_AHRS_MPU6000: first draft implementation of class that uses MPU6000's DMP to calculate attitude 2012-07-28 14:17:38 +09:00
rmackay9 5a9211c278 AP_AHRS: removed var_info from AP_AHRS class (moved to AP_AHRS_DCM) 2012-07-28 14:16:56 +09:00
rmackay9 c2b47d2bf9 AP_AHRS_DCM: moved var_info to belong to AP_AHRS_DCM instead of AP_AHRS 2012-07-28 14:16:15 +09:00
Jonathan Challinger 21f0ed00b3 AHRS: normalise GA_b before computing error vector only if too large 
When GA_b is small the direction of the vector is unreliable, so
normalising can exacerbate the error in the direction
 2012-07-23 17:16:50 +10:00
Andrew Tridgell 5f5c884a6d AHRS: if we don't have gps correction enabled, zero the yaw correction 2012-07-20 17:21:04 +10:00
Andrew Tridgell 4f41b876b1 AHRS: allow the gps/accelerometers to control yaw when rolled 
this solves a problem with yaw estimation when at high roll angles,
when the compass code becomes ineffective
 2012-07-20 11:50:04 +10:00
Michael Oborne 804898c2a5 fix param config names 2012-07-14 15:34:15 +08:00
Andrew Tridgell 15133b1105 AHRS: fixed HIL build 2012-07-10 18:02:05 +10:00
Andrew Tridgell 9b6acf168e AHRS: added AHRS_GPS_GAIN parameter 
this allows control of how much GPS velocity information is used in
doing centripetal correction in DCM
 2012-07-10 16:22:48 +10:00
Andrew Tridgell 9845a55cb1 AHRS: make the yaw independent drift correction optional and disable 
the new correction algorithm copes poorly with gyro drift, leading to
signification attitude errors in the face of drift
 2012-07-06 15:11:30 +10:00
Andrew Tridgell e33554a1f9 AHRS: only enable barometer for AHRS if it is smooth enough 
if we used less than 5 samples to compute the pressure then don't use
it for climb rate
 2012-07-05 16:29:21 +10:00
Andrew Tridgell 9d7ed30023 AHRS: only use GPS for yaw when compass is not being used 
this avoids having two competing controllers
 2012-07-05 13:00:46 +10:00
Andrew Tridgell 6653c0b874 AHRS: enable barometer for vertical velocity 
this re-enables the barometer for vertical velocity information
for drift correction, now that we have a better filter
on the climb rate
 2012-07-05 13:00:46 +10:00
rmackay9 cac0757c2e AP_AHRS: removed DCM_test example sketch 
No longer required because it doesn't compile and is redundant anyway because the AP_AHRS_DCM class is tested in the AHRS_Test example sketch.
 2012-07-04 18:22:51 +09:00
Andrew Tridgell 03516b7dfa AHRS: make DCM drift correction not rely on accurate yaw 
this uses a new formulation of the GPS based drift correction from
Bill Premerlani that rotates the error vector to avoid relying on
accurate yaw. This means we should get accurate roll/pitch correction
even with lots of magnetometer interference

It also makes it possible to fly a multicopter with no compass. It can
even navigate and correct yaw (slowly!)
 2012-07-04 17:00:40 +10:00
Andrew Tridgell e0685f4408 AHRS: make P gain on PI roll/pitch controller tunable 
this is to make it easier for Craig and Alan to tune
 2012-07-04 12:42:46 +10:00
Andrew Tridgell b5aa821071 AHRS: include the P terms in get_gyro() 
this makes it more useful for navigation controllers
 2012-06-29 21:54:09 +10:00
Andrew Tridgell 37494dda2b AHRS: don't add the P terms in _omega 
this can lead feedback via the _P_gain()
 2012-06-29 15:10:51 +10:00
Andrew Tridgell 21ae2957fb AHRS: disable barometer for vertical acceleration 
this seems to have been the cause of the 'flips' seen by Marco and
others. Testing by Craig and Alan shows that the flips are gone when
the barometric acceleration is removed.

It looks like a 5 point average filter is not enough to keep the
vertical acceleteration noise low. With high noise in the z axes, the
x and y axes are scaled back when the ge vector is normalised.
 2012-06-28 11:12:49 +10:00
Andrew Tridgell e531061caa AHRS: re-instate new DCM drift correction code 
This reverts commit 078489638d47fbaffde7c51249e36b5a8fc4ef9d.
 2012-06-28 11:09:22 +10:00
Andrew Tridgell 8600ad8d7f AHRS: revert to the old drift correction algorithm 
we need to work out why Craigs quad flipped today before we enable
this new drift correction
 2012-06-27 18:16:41 +10:00