To separate accuracy requirements for VTOL hover and cruise.
- global_position_relaxed refers to having a valid horizontal velocity aid source
in the estimator and a set global reference position, but poses no requirements
on the accuracy of the provided position estimate.
- Auto flight modes Mission, Loiter and RTL, while in fixed-wing mode,
only require the relaxed global position going forward
- COM_POS_FS_EPH is thus no longer used on fixed-wing vehicles (resp. VTOL in FW)
- rename failsafe_flags.local_position_accuracy_low to failsafe_flags.position_accuracy_low
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Signed-off-by: RomanBapst <bapstroman@gmail.com>
Signed-off-by: Silvan Fuhrer <silvan@auterion.com>
Co-authored-by: Silvan <silvan@auterion.com>
A user configurable delay for the internal `vehicle_local_position` seems confusing in my eyes. It's a different timeout for fixed-wing and multirotor which might have made sense earlier but not really anymore since the topic is constantly published by the estimator and not expected to time out on either vehicle type and the parameter description is also misleading because it's outdated.
- remove commander test ratio "tuning knobs" (COM_ARM_EKF_{HGT,POS,VEL,YAW})
- these are effectively redundant with the actual tuning (noise & gate)
in the estimator, plus most users have no idea why they'd be
adjusting these other than to silence an annoying preflight complaint
- remove ekf2 "PreFlightChecker" with hard coded innovation limits
- ekf2 preflight innovation flags are now simply if any active source
exceeds half the limit preflight
* estimator gps check fail flag for spoofing
* warn whenever spoofing state changes to true, use default hysteresis to completely stop fusion
* dont introduce more GPS namings, GNSS instead
* flash: exclude mantis for cuav_x7pro
Some system are able to dead-reckon for a while after losing GPS or
other sources providing positional feedback. If the estimated position
error grows above the failsafe threshold, the system enters a failsafe
mode. As the position error estimate is growing linerly over time, and
it is recommended to take action before entering the failsafe, we here
warn the user about the imminent failsafe and propose to take manual
control.
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Signed-off-by: Silvan Fuhrer <silvan@auterion.com>
Set this flag to true if local position is valid but accuracy low, such that
the operator can be warned before system switches to position-failure failsafe.
Additionally, switch to RTL if currently in Mission or Loiter to try to reach home
or fly out of GNSS-denied area.
Set low accuracy threshold to 50m by default for FW and VTOL.
Signed-off-by: Silvan Fuhrer <silvan@auterion.com>
- avoid the possibility of unsigned underflow from subtracting two HRT timestamps (uint64_t)
- most of these aren't problematic, but people tend to replicate the pattern, so it's better to be safe
- likely wasn't a problem when people were using hrt_absolute_time() in place, but if using an existing timestamp there's the possibility it's older than a more recent topic update
Pernilla