Re: [Paparazzi-devel] Rotocraft: HOVER w/o GPS?

[Simon Liebold]

Thanks Felix. That answers my question. 

Though, it may also a bit surprising for a novice Paparazzi user who believes the autopilot mode displayed in the GCS. A _real_ airplane autopilot for example, will give an audible and visual alarm when sensor input is  incomplete or out of predefined limits while it passes control back to the (human) pilot. 

But for now, I will make sure to have GPS lock before flipping the mode switch.

Thanks,
Simon

Am 31. März 2015 11:33:23 MESZ, schrieb Felix Ruess <address@hidden>:

It will still go into HOVER_Z_HOLD mode, but your position will drift quickly without GPS.

I would advise not to switch to any position modes while you don't have a GPS fix (without any extra sensors/inputs)...

On Tue, Mar 31, 2015 at 7:12 AM, Simon Liebold <address@hidden> wrote:

And what happens, while it has not acquired the GPS lock (yet), and I switch it into the HOVER_Z_HOLD mode? In the GCS it confirms the mode to be 'H_ZH'. But without GPS lock, what does it fall back to: Vertical hold using the altimeter without horizontal hold or will it nevertheless stay in MANUAL mode (whatever this is set to)?

Simon

Am 31. März 2015 01:09:37 MESZ, schrieb Felix Ruess <address@hidden>:
>Short answer:
>
>yes, you need a GPS.
>
>slightly longer answer:
>
>You need something that can give you a position (like indoor tracking
>system).
>Or at least something like an optic flow sensor...
>
>Cheers, Felix
>
>

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