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Re: [Paparazzi-devel] Paparazzi Failsafe Features?


From: Nathan Aherne
Subject: Re: [Paparazzi-devel] Paparazzi Failsafe Features?
Date: Thu, 30 Sep 2010 07:16:49 +1000 (EST)

You are going to need a multiplexer to achieve this and conform with OBC rules. You are required to have a separate failsafe, especially mission boundary.

Sent from my iPhone

On 30/09/2010, at 7:03 AM, Kurtis Kraemer <address@hidden> wrote:

Hi everyone,
 
I'm looking for some information into the built-in failsafe features in Paparazzi, specifically Tiny/Twog. Is there a place where this is documented?
 
These are the requirements that I need to meet:
 
 1) Lost communication: If communication is lost with UAV, it should return home after 10 seconds.
- Is this already built-in? If not, where/how might I add this in the code?
 
2) RC uplink failure: In case of RC uplink failure, the team captain should notify the Air Program Director.
- I believe this is taken care of by the PPM Encoder, which switches to Auto2. Will the flight plan simply continue, or can I set it to circle or return home? I would also like an audible alert from the GCS.
 
3) Lost GPS: If GPS is lost, manual control of the UAV should be retaken. Otherwise, engine should be killed after a 20 seconds timeout.
- Is this built-in? If not, how can I add it?
 
4) Outside mission boundary: In case the UAV gets outside the mission boundaries, the Air Program Director should be immediately informed. The Air Program Director may ask to terminate flight immediately.
- I believe this is set in the Flight Plan? i.e. a polygon is created and the UAV is not permitted to fly outside this boundary.
 
I appreciate any help. I'm slowly getting familiar with the code, but I'm not quite sure how everything works yet. Failsafes are a pretty important thing to get right, so I want to be sure.
 
Thanks!
 
Kurtis
 
 
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