Re: [Paparazzi-devel] Redundant System

From:

Andrew S

Subject:

Date:

Wed, 12 Aug 2009 10:43:33 +0400

Hello,

Thanks for your replies. I was wondering, to simplify this, if we can make a second system to detect if the TWOG have a problem and make it reset. It's possible?

Best regards

Rui Costa

On Tue, Aug 11, 2009 at 9:57 PM, David <address@hidden> wrote:

Hello,

I work daily with HA products used in business transactions (Oracle, Tibco). they get by with shared storage and state/heartbeat files etc...with two as a minimum.

If both autopilots had a process that both could access the same shared file it's possible to reliably determine if the other is "alive"...the failover one could take over should the primary go down.

So most apps I am familiar with require two and a shared file minimum so I am pretty sure it can be done with two.

- David Conger

On Aug 11, 2009, at 11:22 AM, antoine drouin <address@hidden> wrote:

Hello World

If you're going to make a redundant system, you need at least 3
systems in order to be able to decide if one failed.
You'll also need a way to switch actuators and other peripherals to
the "good" instance of the autopilot.

Regards

Antoine

On Tue, Aug 11, 2009 at 10:05 AM, Rui Costa<address@hidden> wrote:

Hello all,

It would be very nice to implement a redundant system control for the
paparazzi project.
A system with for example two TWOGs. In case of a twog failure the other one
assume the control.

What do you think about it? It's difficult to design?

Best Regards
Rui Costa
www.azoreanuav.com

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--
Rui Costa
www.azoreanuav.com