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DarkButterfly:
18 Aug 2019 19:13:57
Had another negative encounter, it's been a few years since the last one, just an uneducated ******, going on about drones being illegal yada yada yada.    :-/
Still that didn't spoil my flying time, had an absolute blast  ~~
Gaza07:
07 Aug 2019 19:52:01
ooooh mrs jones  :D
hoverfly:
30 Jul 2019 15:26:34
D.B. you tightwad.. :cool:
atomiclama:
29 Jul 2019 20:14:10
DB that just means you have shed loads of props in the first place ;-)
DarkButterfly:
29 Jul 2019 18:53:33
Just had a thought, even with all the crashing I've done, I haven't bought any replacement props in over a year ~~
ched:
09 Jul 2019 19:45:42
May the sun shine and winds be light for BFU#8. Son't forget lots of vids for those of us unable to attend.  :D
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09 Jul 2019 18:10:30
Hope you all have a great day  :beer2:
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09 Jul 2019 14:05:28
BFU#8 details locked in for this saturday - see the head of the forum thread for all details.
hoverfly:
05 Jul 2019 21:51:05
Good for genital warts as well......or so I'm told.. :hmm
DarkButterfly:
05 Jul 2019 21:48:24
Just fixed a busted SMA connector on my TBS unity pigtail, it suffered badly in a recent crash and split in two, nothing a touch of the soldering iron couldn't fix  :D
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Printing 3d Forum

Effects of wind and how to improve stability

Started by robshaw, Tuesday,May 07, 2013, 20:07:46

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robshaw

Hi guys,

Ive been out flying today at Southend-on-Sea beach.  Things went ok but there was what I would call the occasional gust of a breeze.  I would say less than 5mph. Hardly anything.  Ive been noticing my quad is affected pretty badly by any slight breeze and starts to move a bit unpredictably. I have noticed this in stabilise mode as well as loiter and alt hold.

What PIDs should I be looking to change to try to improve this, and in particular the stabilise stability?

Thanks

Rob
Tunrnigy Talon Tri, TBS Discovery, TBS Discovery PRO, Spnky 250 Mini, EZUHF, EZOSD

dfidalgo


firey1

Saturday,May 25, 2013, 20:34:03 #2 Last Edit: Saturday,May 25, 2013, 20:53:26 by firey1
P= gives you overall stability
D= how fast it reacts to change
I=how fast it corrects sensor errors

So to improve wind movement you increase your D to just below oscilation then increase P to just below oscilation
With the (I ) you have to be careful with as too much and the craft will go crazy trying to keep up with the fast change in error computing
overall its a very fine balance between all three PID to make a stabilised craft  for all weather conditions but you will never fully combat wind gust
but your ideal aim is to  make your craft as fast as possible to react to changing outside factors affecting it

The other option is to have two files one for calm flying and one for windy days and load appropriate for the conditions
MIKE

550 RC Spider quad for FPV
550 Alien quad (my sons now)
F450 quad
450 size bell 212, MD500,Augusta 109
600 size Huey running apm 2.5  3 planes  Taranis and 9xr  radios Skyzone FPV goggles

peter_a

I asked the same question today :-

http://www.multi-rotor.co.uk/index.php?topic=2699.msg21521;topicseen#new

I`ve tried just lowering rate P and it then gets sloppy.

So if I have you right  :-

I lower rate P and rate I , and increase rate I until it start to oscillate then slowly back it off until it stops , then increase rate P until it start to oscillate then slowly back it off until it stops.

Is this wind free or in the a slight wind ?

firey1

Saturday,May 25, 2013, 21:46:00 #4 Last Edit: Saturday,May 25, 2013, 21:53:29 by firey1
lowering P rate will make it worse as you are wanting the craft to react more quickly to the change not slow it down

You can never have a setup that will be ideal for all wind conditions unless you have multi setups for different wind strength days

the best bet is to pick a normal day you like to fly in depending on your location

From your stock settings
first increase D rate up till oscillation then back off a bit
increase P rate till osscillation then back off a bit
Increasing I rate can help but this creates other issues if to high but helps with computing error for movement from gusts

And you will always get a height movement in gusts as this creates a high or  low air pressure over the baro

Bit like riding a motorbike constant wind you know its there and lean into it to compensate (P&D)
gusts catch you out and are slower to react (I)
MIKE

550 RC Spider quad for FPV
550 Alien quad (my sons now)
F450 quad
450 size bell 212, MD500,Augusta 109
600 size Huey running apm 2.5  3 planes  Taranis and 9xr  radios Skyzone FPV goggles