[Dprglist] self driving trucks and the desert

[secretary at dprg.org]

-All,
      David's video is actually titled "Implementing Robot Waypoint
Navigation by David Anderson – DPRG Virtual Monthly Meeting, 6/12/2021".
However, the video introduction does list the date as May 12th. When
searching for the video use the title above, do not search for May 12th.
Excellent presentation.

Regards,
Doug P.

On Thu, Oct 28, 2021 at 8:35 AM David P. Anderson via DPRGlist <
dprglist at lists.dprg.org> wrote:

> Howdy DPRG
>
> On 10/27/21 10:23 PM, Rud Merriam via DPRGlist wrote:
>
> [snip]
> >
> > If you're not familiar with subsumption is is a list of behaviors or
> > actions. Every cycle the list begins again until one of the behaviors
> > "fires". The processing starts again at the beginning of the list.
> > That's simplified but gives the idea. I actually found that setting a
> > flag and letting the list finish processing also worked. Once the flag
> > was any following behavior would not "fire" but it could record
> > information. That was useful for handling behaviors that did a timing
> > function.
> >
> > [snip]
> >
> > Subsumption is basically an OR operation, just like a logic gate. If
> > one behavior fires the overall  gate becomes true and returns to a
> > higher level in the tree. There is also an AND operation where all the
> > behaviors must fire before returning true. If one fails to fire a
> > false is returned. The other main operation is NOT which is an
> > inverter of the output of a list.
> >
> If you're not familiar with subsumption,  the above is not an accurate
> description.  At all.   ;)
>
> For those who might be interested, the Joseph Jones books "Mobile
> Robots" and "Behavior Based Robotics" provide sort of the canonical
> definitions for subsumption and how it works.  If you don't want to read
> that much then I think I did a pretty good job of describing it in the
> DPRG talk from last June, for which there is a YouTube video on the club
> web page, (miss-labeled "May 12" rather than "June 12").
>
> cheers!
>
> David
>
>
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