[Dprglist] Compass heading using gyroscopes?

[Murray Altheim]

Hi John,

A one degree error may be two inches after ten feet, but I'll be reading
that heading continuously so over that ten feet wouldn't things tend to
balance out?

I don't disagree but I think you may be missing my ultimate point: that
even with low accuracy a robot will still have "a behaviour" and that is
plenty good enough for my purposes, which are not competitive but rather
the exploration of an indoor environment using a Behaviour-Based System,
basically following along the research path set by Rodney Brooks et al.

I am aware of the difference between resolution and accuracy, and having
both a higher resolution and a higher accuracy would improve the robot's
ability to navigate accurately -- certainly -- and I'm hardly against
that; it's just that I'll be satisfied with much less. As I described
previously, something akin to a determining which point on a 16 or 32-
point compass rose is fine. If I can get better accuracy I might explore
navigating according to a bearing but I have no requirement for that at
this point. Maybe in the future... it's an interesting journey either way.

Cheers,

Murray

On 15/05/20 8:00 pm, John Swindle via DPRGlist wrote:
> A quick note: A one-degree error is two inches after ten feet. Not 
> good enough for small robot navigation unless something is constantly 
> providing better pointing accuracy. Even for the contests, if the robot
> depends on that amount of error, it would miss the goal in 6 Can, might
> hit the cone in Square Dance, etc. Outdoors, the accuracy has to be a
> lot better. I think you will be very unhappy with 11.25 degree 
> resolution. And be careful that resolution and accuracy are not the
> same thing.
> 
> Later,
> John Swindle
...........................................................................
Murray Altheim <murray18 at altheim dot com>                       = =  ===
http://www.altheim.com/murray/                                     ===  ===
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     In the evening
     The rice leaves in the garden
     Rustle in the autumn wind
     That blows through my reed hut.
            -- Minamoto no Tsunenobu