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Cruise rtl pumps

(Klaus Müller) #1

Hello,

have a sonic model - binary.
He flies very well in manuel mode,
he also flies clean in the fbw.
The plane stops at about 50% gas its height.

Only in the cruise or RTL he pumps very strong?

Log:
https://drive.google.com/file/d/1UX-8ixkT1-p7Tuypt3HsM3-znAXxseEO/view?usp=sharing

(basti) #2

@Schachti that’s some noticeable low-freq pitch-loop oscillation buildup in CRUISE. imho your pitch limits and PIDs are somewhat off default, i couldn’t reproduce pitch-loop oscillations like yours in SITL though.

maybe @tridge could take a look at this log if time permits?

1 Like
(Rolf) #3

Hi Schachti,

You’ve done autotune, but not yet the speed and height tuning: http://ardupilot.org/plane/docs/tecs-total-energy-control-system-for-speed-height-tuning-guide.html?highlight=tecs

Some parameters for autothrottle modes are not good adjusted to your aircraft.

For example, TRIM_THROTTLE is too high and TRIM_ARSPD_CM is too low:

Of course I’m curious what @Tridge says

Rolf