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Permalink Reply by Krzysztof Bosak on February 24, 2010 at 1:44am

"so the drone would fly around the most recent set of coordinates until new ones came through, "
take a GPS and walk in your city before designing such algorithms...
Don't be surprised if your last best coordinates cover entire city plus nearby lake.

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Permalink Reply by Curt Olson on June 23, 2010 at 3:19pm

I've driven through some very deep urban canyons with gps ... mixed results, but newer gps's work much better. So definitely you could get lost for a few blocks, but more than likely you'll get a useful solution most of the time.

Permalink Reply by Morli on February 23, 2010 at 10:50pm

I like the 7P Gay, but I hate the " fail to plan and plan to fail" because thats the only thing my my ex boss knows and said ever coz he never knew what it means

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Permalink Reply by Morli on June 22, 2010 at 12:06pm

William ,can't see details of any products in the site with out login account. I registered yesterday and yet to get the password!!.?

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Permalink Reply by Jonathan Lussier on June 22, 2010 at 12:56pm

You can use optical flow theory and practice (based on computer mice) and a laser rangefinder (not lidar) for cheap terrain avoidance. The Kestrel autopilot supports these functions:
http://books.google.ca/books?id=EsjPyblwMdQC&pg=PA213&lpg=P...

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Permalink Reply by Krzysztof Bosak on June 23, 2010 at 2:52am

They are using Procerus Kestrel.

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Permalink Reply by Hooks on June 23, 2010 at 7:46am

@William Peterson Where are the link to these videos showing it works..

Looks more or less like a little PR hunting to me.

The same text has been posted in different discussion?

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Permalink Reply by Morli on June 23, 2010 at 7:54am

Yep, for now thats all it is. No response from William or from the website registration. BTW he is CEO of that company. No problem with that but you can not see any details to back his claims!! Poor response and poor methodology of approach to open forum :).

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Permalink Reply by Dave Whittington on June 23, 2010 at 2:43pm

Well, one simple idea that simply addresses the terrain(not power lines or trees, etc.) coming up to smack you would be to use the waypoint planning config tool to use Google-earth information about the sea-level height data underneath your proposed track - maybe you could even look left and right of the track some distance and find the highest terrain height. This data would be recorded for on board use(might have to be a table with lat/lon coords) and have a minimum height clearance to enter into the autopilot altitude calculation.

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Permalink Reply by Morli on June 23, 2010 at 2:55pm

Yes, that is best way to approach known terrain . At hobby level of UAV flying , I am not sure if we have to make our life complicated by flying into unknown. In any case if the we are not suppose to fly beyond visual limits where ever we fly , we should be able to see what is around us for few K.M and if so what is the point of terrain avoidance system in DIY autopilot flying perspective unless we fly in valleys and among lots of hills?! Just my 2 cents worth..

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