On Mon, Dec 19, 2011 at 7:42 PM, Simon Wilks <
address@hidden> wrote:
> On Mon, Dec 19, 2011 at 6:23 PM, Eduardo lavratti <
address@hidden>
> wrote:
>>
>> As i tell you ... i have the same behavior when i using a HIGH valeu on
>> guidance_V P parameter.
>
> OK, got it.
>
>
>>
>>
>> This is the first think that i will modify in PPZ software.
>> When the throttle is around 0 the ATTITUDE control stop control the
>> motors.
>
> That would be great. This is pretty nasty (and extremely surprising)
> behavior.
>
> Thanks
>
> Simon
>>
>>
>>
>> ________________________________
>> Date: Mon, 19 Dec 2011 09:56:34 +0100
>> From:
address@hidden
>> To:
address@hidden
>> Subject: Re: [Paparazzi-devel] Strange throttle behavior
>>
>>
>> I just replayed the logs and the GCS shows the throttle input going to 0%
>> after about 3 secs but the octocopter was clearly still flying for another
>> 3-4 secs after this I till I hit the kill switch.
>>
>> On Sun, Dec 18, 2011 at 10:13 PM, Simon Wilks <
address@hidden> wrote:
>>
>> On Sun, Dec 18, 2011 at 10:06 PM, Hector Garcia de Marina
>> <
address@hidden> wrote:
>>
>> Yeah,
>>
>> regarding the safety, I agree with Eduardo, next time DO NOT run next to
>> the copter if you have lost its control until it completely is switched off.
>>
>>
>> Yes you are right. I should keep clear till it has settled.
>>
>>
>>
>>
>> Cheers
>>
>>
>> On Sun, Dec 18, 2011 at 9:31 PM, Eduardo lavratti <
address@hidden>
>> wrote:
>>
>> Hey man ... take care with your tests !
>> This props and motors are very POWER and DANGEROUS !
>> Take a look at this pictures
>>
http://brquad.blogspot.com/2011/04/little-acident-with-my-big-hexa.html
>> This accident occurred when i make some tests with my big hexa whit same
>> motors and props.
>> Never make this tests with children arround.
>> Well, for the JUMP problem reduce the "guidance_V / hover_KP" and make a
>> test.
>>
>> Make the same for wooble. Reduce the P & D GAIN parameter for Theta and
>> Phi . You see this values in STABILIZATION_ATTITUDE section.
>> Reduce P for 300 and make a test.
>>
>> Stay sure that your props are very well balanced or your lisa board have a
>> good vibration isolation.
>>
>> When i make my first fly using lisa/m i have similar attitude on me small
>> octo (5"props) and on my quad (8" props)
>> after i balance the props and make a good vibration isolation all problems
>> are solved.
>>
>> Regards and sorry for my poor english.
>>
>> Eduardo Lavratti
>> Brasilian UAV developer.
>>
>>
>> ________________________________
>> Date: Sun, 18 Dec 2011 20:38:21 +0100
>> From:
address@hidden
>> To:
address@hidden
>> Subject: [Paparazzi-devel] Strange throttle behavior
>>
>>
>> Hi
>>
>> I have been noticing what seemed like a lag in throttle control though I
>> wasn't 100% sure till my first test flight today (octocopter, lisa/l,
>> spektrum satellite receiver). While on the ground I don't seem to notice
>> this effect but when holding it above my head or lifting off strange things
>> start to happen.
>>
>> When holding it above my head changing the throttle on the sender seems to
>> take a second or two till it happens on the copter. I have also noticed what
>> seems to be a general increase in throttle all of sudden, not just to
>> correct attitude but like a it wants to pull up and away.
>>
>> When I tried the first flight today I got a bit of a shock when I wanted
>> to just lift off a bit then set down only to discover it did not want to
>> respond to the fact that I had returned the throttle back to zero and
>> skipped off across the garden. In the end I had to flick the kill switch.
>> Pretty funny after the event. I have a video if you want a laugh here.
>>
>> You will see the props rotating at minimum speed (zero throttle on the
>> sender) after arming. I assume this is correct? One of the props isn't
>> rotating properly and I suspect it might have a problem and need swapping
>> with a spare (it has a bit more resistance to the hand when rotating than
>> the others) but I thought it might be OK to try a small hover anyway.
>>
>> Any ideas what causes this kind of throttle behavior? Pitch and roll seem
>> pretty responsive. Here is the aircraft config.
>>
>> Thanks
>>
>> Simon
>>
>>
>>
>>
>>
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>>
>>
>> --
>> Héctor
>>
>>
>>
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