Re: [Paparazzi-devel] On Screen Display (Reto Buettner)

[Reto Büttner]

See:

http://www.millswoodeng.com.au/failsafe_device.html

Cheers, Reto

2011/8/3 Bernard Davison <address@hidden>:
> You'd have to have a separate path to control the servos.
> At the moment everything is going through the paparazzi flight computer.
> So if something in it crashes then the system will be left hopefully in a
> failsafe mode.
>
>
> On 03/08/2011, at 6:30 PM, Rui Costa wrote:
>
> Since we are talking on redundancy. Is there any way to have a sorte of an
> watchdog board that will change to an independent manual control of the
> aircraft if any paparazzy board crash was detected? Some kind of a
> relay/switch?
>
>
>
> Best regards
> Rui Costa
>
>
>
>
> On Wed, Aug 3, 2011 at 8:09 AM, Reto Büttner <address@hidden>
> wrote:
>>
>> Hi Vladimir,
>>
>> the effectivity of redundancy measures depend very much on the failure
>> mode. If the main Paparazzi board completely fails, you are right.
>> Then the plane is not steerable anymore, neither autonomously nor
>> manually and the plane crashes. The main Paparazzi board is a very
>> hard to avoid single point of failure. But if the main paparazzi board
>> only fails partially (e.g. autonomous control loops not working
>> properly anymore), only the GPS, the IR sensors/IMU/INS/AHRS or the
>> serial data link fail, then the redundancy using FPV and a separate
>> OSD will save your aircraft.
>>
>> Cheers, Reto
>>
>> 2011/8/2 Volodymyr Khudyakov <address@hidden>:
>> >
>> > If Paparazzi fails, you simple fall to ground...
>> > All control you have from AP board and any OSD can help you.
>> >
>> > Sincerely
>> > Vladimir
>> >
>> > Date: Tue, 2 Aug 2011 15:21:47 +0200
>> > From: Reto B?ttner <address@hidden>
>> > To: address@hidden
>> > Subject: Re: [Paparazzi-devel] On Screen Display
>> > Message-ID:
>> >
>> >  <address@hidden>
>> > Content-Type: text/plain; charset=windows-1252
>> >
>> > The OSD of C?dric based on the Paparazzi data stream is great. Very
>> > compact and well integrated. Thanks for developping and sharing.
>> >
>> > For long range missions I prefer a separate OSD system for redundancy
>> > reasons. If Paparazzi fails you can complete the mission using FPV and
>> > OSD. If FPV and/or OSD fail you can complete the mission using
>> > Paparazzi.
>> >
>> > Cheers, Reto
>> >
>> >
>> >
>> >
>> > _______________________________________________
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>> >
>>
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>
>
>
> --
> Rui Costa
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