|Subject:||Re: [Paparazzi-devel] ground / airborne interaction|
|Date:||Tue, 6 Oct 2015 21:39:05 +0200|
hi felix, thanx for commenting. some more text inline below ..
Felix Ruess writes:
> 1. That is correct, the integrated error is currently not reset when gains
> are updated via settings.
> However that could easily be added in settings with a "handler" that will
> reset it when a setting is changed.
> Not sure if we really want that to happen every time a gain is changed
it could be fully reset or clamped to a reset value, along the lines of
what's listed here
> 2. Hm... good question... Sending RC_4CH messages (what joysticks do) and
> would be one solution, but I think you currently can't use a regular RC and
> joystick at the same time.
so i could just use the joystick, and mix manual and programmed commands
in my script and send the sum via RC_4CH.
> I think the long-term clean solution would be to set the quad into a sort
> of external guided attitude mode and send attitude commands via separate
> datalink messages.
hm, how do you handle the mixing of attitude control commands from RC
and the nav/guidance system, isn't that the same/similar situation?
> 3. To try to find out where the message is dropped, could you try with
> connecting a usb<->serial cable to the telemetry uart directly and see if
> you also don't get the setting confirmation?
ah, should've thought of that, i'll try it.
> On Wed, Sep 23, 2015 at 4:52 PM, Oswald Berthold <address@hidden> wrote:
>> hi all,
>> i spent the last days implementing this PID tuning approach  for a
>> pprz system, see  in case you're interested. basically it all works
>> but there are some items left which i'd like ask you about:
>> 1. i have the impression from observing the behaving copter that the
>> error integral doesn't get reset when i update the params (pgain_,
>> dgain_, igain_, ddgain_). is this the case and how would i best go about
>> it: send a reset request msg or just put that into airborne code?
>> 2. currently i'm using the RC to manually send the probing motion
>> commands during evaluation but i would like to send a fixed control
>> signal from my python script. should a just pretend being a joystick?
>> do joystick and RC work together?
>> 3. i'm kind of confused about the settings confirmation: basically all
>> settings get sent at about 1 Hz in cycle mode. when you do a dl_setting
>> the AP responds immediately with a confirming dl_value. the confirmation
>> msg though seems to get dropped on my telemetry connection quite often
>> though. i gave up on trying to wait for the confirmation and just
>> transmit the params at 1 Hz. i already replaced the 57kb xbee S1
>> modems with 115kb rctimer ones, which improves things a bit but i still
>> get dropped msgs. any ideas on how this could be done properly?
>> (i know i could figure out 1 + 2 by surfing the code but if anyone can
>> provide hints that'd help).
>> cheers, opt
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