Re: [Paparazzi-devel] A couple more questions

[Felix Ruess]

Hi Chris,

which ahrs algorithm are you using? And what version of paparazzi (date)?

What does your PFD show if you are flying straight in manual? I guess
not zero roll... the PDF just shows the estimated attitude...
If you are flying straight in manual it doesn't mean that your
aircraft is actually level.

Cheers, Felix

On Thu, Jul 14, 2011 at 11:56 PM, Chris <address@hidden> wrote:
> Hi.
> I use the PpzUavimu and so far i am very happy with it, it is really working
> great,
> but  it seems that the PFD indicator is behaving in a peculiar way.
> After a couple of trimming flights i was forced to use -4 degrees for the
> INS roll neutral default
> in order to make the plane fly level in AUTO1,
> <section name="INS" prefix="INS_">
> <define name="ROLL_NEUTRAL_DEFAULT" value="RadOfDeg(-4.0)" unit="radians"/>
> <define name="PITCH_NEUTRAL_DEFAULT" value="RadOfDeg(0)" unit="radians"/>
> </section>
> and now the PFD shows that the plane is rolled to the right by the same
> amount (4 degrees)
> although it flies straight in AUTO1 and AUTO2.
> It also shows this when it stands on the ground level.
> Shouldn't the PFD show that i am level since the plane actually is flying
> straight in the air?
> I also want to ask why i need to input those 4 degrees since the Ppzuavimu
> is level on the plane
> and the plane is trimmed mechanically for completely level flight in MANUAL
> mode.
> Is there any settings that i can change in order to remove this -4 degrees?
> (like tilting the actual imu or something else)
> Another problem i have is when there is  strong wind blowing and the plane
> is making circles
> it looses much altitude when the it changes from headwind to tailwind.
> Is there any parameters i can tweak for the better?
> Chris
>
>
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