That is what the Mistral ECU does. Take a look at their engine controller.
Marc W.
>
> From: al p wick <alwick@juno.com>
> Date: 2005/06/06 Mon PM 08:16:48 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: EC2 dual power feeds
>
> FWIW, I disagree .
> -al
>
> On Mon, 6 Jun 2005 19:07:14 -0500 "Wendell Voto" <jwvoto@itlnet.net>
> writes:
>
> In order to have truly redundant EC2s would require a 3rd CPU to monitor
> the two controllers and automatically switch the failed unit off.  Then
> what is going to monitor the 3rd computer?
> Wendell
>