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130 Commits

Author SHA1 Message Date
Andrew Tridgell
7a76f72bf5 AP_AHRS: added uptime_ms() interface 2015-05-20 15:22:14 +10:00
Andrew Tridgell
3529e02675 AP_AHRS: if we have 3 gyros then only use first two 
the 3rd gyro on a PH2 has a lot more noise as it is not vibration
isolated
 2015-05-09 21:00:49 +10:00
Peter Barker
463270e0ee AP_AHRS: avoid FPE when we don't have a compass reading 2015-05-05 15:02:35 +10:00
Andrew Tridgell
4d4a607b80 AP_AHRS: revert AP_Math class change 2015-05-05 13:27:05 +10:00
Tom Pittenger
20f47417d5 AP_AHRS: compiler warnings: apply is_zero(float) or is_equal(float) and float to doubles 2015-05-05 13:26:55 +10:00
Andrew Tridgell
6bfca648b9 AP_AHRS: raise DCM P gains when disarmed for first 20 seconds 2015-04-28 14:07:39 +10:00
Tom Pittenger
e28c555889 AHRS_DCM: fix compile warnings re float constants 
Also fix example sketch
 2015-04-24 12:26:08 +09:00
Paul Riseborough
5184bca87f AP_AHRS: Prevent DCM reporting good tilt error when inverted 2015-04-23 20:35:39 +09:00
Paul Riseborough
ea8217bd3a AP_AHRS: Reduce time constant on filtering of DCM error reporting 
Reduces time constant from 2 to 1 second to make data more useful for pre-flight alignment checks by the EKF
 2015-04-23 20:35:35 +09:00
Andrew Tridgell
a0969905ce AP_AHRS: make get_error_rp() and get_error_yaw() const 
this makes them usable by multiple consumers, and allows use by EKF
 2015-04-21 21:42:17 +10:00
Andrew Tridgell
585a105128 AP_AHRS: use compass->last_update_usec() 2015-03-14 12:31:50 +11:00
Andrew Tridgell
68f64fa11c AP_AHRS: make the healthy() method const 2015-02-01 14:13:52 +11:00
Andrew Tridgell
ed0a56cc3c AP_AHRS: cope with the changed semantics of airspeed.use() 2015-01-20 11:27:58 +11:00
Jonathan Challinger
4975cefd84 AP_AHRS_DCM: update _accel_ef_blended 2014-12-05 19:40:06 +09:00
Randy Mackay
dffcfb42bc AHRS: add reset_gyro_drift method 2014-10-28 20:25:33 +09:00
Randy Mackay
39c8535223 AHRS_DCM: sanity check AHRS_RP_P and AHRS_YAW_P 2014-10-21 21:41:41 +09:00
Andrew Tridgell
270bac4472 AP_AHRS: make get_position() const 
This allows use from within AP_Mission
 2014-10-20 08:36:20 +11:00
Andrew Tridgell
4ad643b233 AP_AHRS: use a common function for updating the CD values 
this ensures the wrapping of yaw is consistent between the 3 use cases
 2014-10-15 13:18:08 +11:00
Andrew Tridgell
63c06ea2af AP_AHRS: fixed calls to DCM in parent class 
use_compass() and reset() are common to AP_AHRS_DCM and
AP_AHRS_NavEKF. As AP_AHRS_NavEKF is a child of AP_AHRS_DCM, when we
call use_compass() from within AP_AHRS_DCM we actually end up calling
AP_AHRS_NavEKF::use_compass().

This has the effect of disabling the compass in DCM when EKF is active
and EKF has decided not to use the compass. That means that the DCM
yaw (and in fact the whole attitude) can get badly off while EKF is
enabled, making DCM an ineffective fallback if EKF fails.

The fix is to call the specific class versions of use_compass() and
reset()
 2014-10-15 10:12:50 +11:00
Randy Mackay
85eee31510 AHRS: rename ekfNotStarted method to initialised 
Also created default implementation in AP_AHRS class so AP_AHRS_DCM does
not need to implement it.
 2014-10-02 14:40:54 +09:00
priseborough
7cea7c6a18 AP_AHRS : add method to report if EKF is waiting to start 2014-10-02 14:38:29 +09:00
Przemek Lekston
ae4814a773 AP_AHRS_DCM.cpp: changed the direction of position projection to ensure correct behavious in crosswind 2014-08-07 12:34:30 +10:00
Andrew Tridgell
6a275372dd AP_AHRS: ensure get_position() fills in flags 2014-07-25 11:40:16 +10:00
Andrew Tridgell
b3c1e515dc AP_AHRS: when no accel info available in buffer use current value 
this prevents an initialisation error, and is reasonable in flight too

Pair-Programmed-With: Paul Riseborough <p_riseborough@live.com.au>
 2014-05-15 22:19:54 +10:00
Andrew Tridgell
315290029a AP_AHRS: fixed check of accel sensor health 
we need to check health of each accelerometer separately
 2014-05-15 22:18:56 +10:00
Andrew Tridgell
1a05c27bbb AP_AHRS: added healthy() function 
this will be used to report when the AHRS subsystem becomes unhealthy
 2014-05-15 21:14:21 +10:00
Andrew Tridgell
4d24a86088 AP_AHRS: prevent a infinity value 2014-04-21 15:37:07 +10:00
Andrew Tridgell
f07e4dee52 AP_AHRS: convert to new GPS API 2014-04-01 06:38:24 +11:00
Andrew Tridgell
b53496d470 AP_AHRS: choose the best accelerometer at each drift correction step 
this greatly reduces the impact of aliasing on accelerometers by
choosing the accelerometer that produces the smallest error term in
DCM. The difference can be quite dramatic on the Pixhawk.
 2014-02-27 09:41:28 +11:00
Andrew Tridgell
0b45d2bc06 AP_AHRS: removed the AHRS_GPS_DELAY parameter 
the best value has turned out to be 1, and tweaking it has not turned
out to be useful, so this simplifies the code in preparation for
adding the anti-aliasing handling with multiple accelerometers
 2014-02-27 08:57:44 +11:00
Jonathan Challinger
f321a5f241 AP_AHRS: Change airspeed_estimate to const in children of AP_AHRS 
Allows roll/pitch controllers to use DCM's airspeed estimate. Thanks to Kevin Hester for assistance in finding this.
 2014-02-25 18:49:16 +11:00
Andrew Tridgell
eedd88c2ec AP_AHRS: give zero lat/lng and baro alt if no position yet in DCM 2014-02-15 09:25:40 +11:00
Andrew Tridgell
25ef0d5a7b AP_AHRS: don't allow get_velocity_NED() and get_relative_position_NED() without EKF 
this avoids some linking issues, plus the functions are inaccurate
without EKF
 2014-02-15 05:48:24 +11:00
Andrew Tridgell
c62ccce9d8 AP_AHRS: make estimate_wind() public 
this avoids it linking into copter
 2014-02-15 05:48:24 +11:00
Paul Riseborough
08267cea87 AP_AHRS: Scheduling for yaw gain to reduce atitude errors in turning flight 2014-02-15 05:48:22 +11:00
Andrew Tridgell
5d43a1d704 AP_AHRS: added inertial nav interfaces to AHRS 2014-02-15 05:48:16 +11:00
Andrew Tridgell
392995ef84 AP_AHRS: make AHRS handle altitude 
AHRS now holds the home position
 2014-02-15 05:29:47 +11:00
Randy Mackay
6946d68318 AHRS_DCM: call update_trig 2014-02-08 18:16:42 +09:00
Paul Riseborough
f2c2811ef3 AP_AHRS & AP_Math: fixed bug in use of AHRS_TRIM parameters 2014-01-19 07:19:43 +11:00
Andrew Tridgell
baa4ecc2ea APA_AHRS: update for compass API change 2013-12-09 17:34:07 +11:00
Andrew Tridgell
b248cc0868 AP_AHRS: fixed a build warning 2013-11-23 21:44:56 +11:00
Andrew Tridgell
6ed493b10f AP_AHRS: added attitude_reset() method for HIL_SENSORS 2013-11-23 18:50:56 +11:00
Andrew Tridgell
4f871c87f1 AP_AHRS: detect and try to cope with bad accels 2013-11-07 13:54:16 +11:00
Andrew Tridgell
02d6f012ce AP_AHRS: added accel sum delay buffer to account for GPS lag 2013-11-04 21:21:42 +11:00
Andrew Tridgell
d31e557983 AP_AHRS: save memory and reduce pointer references 
use a refence for ins, and don't save gyro and accel between updates
 2013-11-04 21:21:37 +11:00
Andrew Tridgell
cb52b6f367 AP_AHRS: removed limit on normalisation of accel reference vectors 
this could lead to a bias in the accel drift correction
 2013-11-04 21:20:41 +11:00
Andrew Tridgell
31eaaada62 AP_AHRS: removed vertical G limit on GPS velocity correction 
this limit could lead to a bias in the accel drift correction, and is
frequenctly exceeded
 2013-11-04 21:20:41 +11:00
Andrew Tridgell
a7931b1581 AP_AHRS: fixed wrapping bug in GPS based heading error 
this bug could cause the GPS based yaw to use an expensive reset far
too often
 2013-11-04 21:20:41 +11:00
Andrew Tridgell
17b27a47de AP_AHRS: prevent GPS yaw resets on compass errors 
when we switch from compass heading to GPS heading we don't want to
trigger a sudden GPS yaw reset
 2013-11-04 21:20:41 +11:00
Andrew Tridgell
d305dd5946 AP_AHRS: debounce the GPS/compass consistency test 
we will only consider the compass inconsistent with GPS if it is off
for more than 2 seconds
 2013-10-23 09:40:42 +11:00