When having no velocity estimate the derivative was updated with zero.
When losing the velocity estimate this is fine since the resulting
derivative spike doesn't get used and acceleration is set to NAN.
But when regaining the velocity estimate the spike from zero to
the first estimated velocity gets used as acceleration in the position
controller and results in a twitch.
To solve this I use the derivative reset I introduced in pr #13522
commit b64abf48b2
This caused bad altitude control performance when enabling
terrain following. It even leads to complete vertical control
instability in case dist_bottom is inaccurate.
Relying on the estimator states is the way to go instead of
silently using one altitude source as state.
The test was testing the result of 3D float vector operations with binary equality of the floating point numbers, which is not a valid assumption to make for floating point math. This change switches to proper comparisons with float accuracy and compares vectors using the norm of their difference.
used back in time when no soothing was done to avoid large steps when
the estimator stops sending a maximum velocity (e.g.:GPS gained during
optical flow flight). Since smoothing is applied later, this is not
required anymore.
This issue was found by @khabir and reported over slack.
It resulted from the split up of the big pr #12072 into #13262.
I took over the interface while the internal states still stayed the
hard to understand internal ones. One of the follow up refactors will
fix this completely and the entire legacy setpoint restore block can
be removed.
The plot of the attitude setpoint in the log did not show any values
because the message timestamp that the position control module sets
was overwritten by the PositionControl attitude generation.
by applying it directly to the attitude setpoint which is the output of
the position controller.
The problem was that before the input to the attitude setpoint generation
was adjusted to generate a level attitude with zero thrust keeping the
heading. I refactored the PositionControl class in #13262 to directly
generate the attitude setpoint output. So here I'm adjusting the attitude
setpoint to do the exact same thing as before but without interleaving
with the PositionControl logic.
and remove the px4_ prefix, except for px4_config.h.
command to update includes:
for k in app.h atomic.h cli.h console_buffer.h defines.h getopt.h i2c.h init.h log.h micro_hal.h module.h module_params.h param.h param_macros.h posix.h sem.h sem.hpp shmem.h shutdown.h tasks.h time.h workqueue.h; do for i in $(grep -rl 'include <px4_'$k src platforms boards); do sed -i 's/#include <px4_'$k'/#include <px4_platform_common\/'$k/ $i; done; done
for in $(grep -rl 'include <px4_config.h' src platforms boards); do sed -i 's/#include <px4_config.h/#include <px4_platform_common\/px4_config.h'/ $i; done
Transitional headers for submodules are added (px4_{defines,log,time}.h)
Beat Küng