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October 2015

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Sender:
First Lego League in Virginia and DC <[log in to unmask]>
Date:
Tue, 20 Oct 2015 13:48:09 -0400
Reply-To:
Frank Levine <[log in to unmask]>
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From:
Frank Levine <[log in to unmask]>
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To: "Thomas (Tweeks) Weeks" <[log in to unmask]> cc: "<[log in to unmask]>" <[log in to unmask]>
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PID is good when you have non-straight lines, because it will react to the
'D' term as the line starts to turn away.  In practice, PID is not easy to
program (correctly) in EV3.  I have tried.  It also requires a level of
math that my team has not learned yet.  They're in 5th grade now... maybe
next year.  I do think that PID would be good for straight line driving
using the gyro.  For almost all normal FLL tasks, just doing 'P' will get
you where you need to go.

On Tue, Oct 20, 2015 at 1:44 PM, Thomas (Tweeks) Weeks <[log in to unmask]
> wrote:

> Thanks.. Great resource. :)
>
>
> Still didn't see any pure PID straight line tutorials though.. although I
> DID like the "straight line" tutorial and how it used degrees.
>
> :)
>
>
> Tweeks
> ------------------------------
> *From:* Todd J Lennox <[log in to unmask]>
> *Sent:* Tuesday, October 20, 2015 1:04 PM
> *To:* Thomas (Tweeks) Weeks
> *Cc:* [log in to unmask]
> *Subject:* Re: [VADCFLL-L] Any good EV3 Code Examples for a Straight Line
> PID program?
>
> Try EV3 lessons. They have some really good stuff.
>
> Sent from my iPhone
>
> On Oct 20, 2015, at 12:35 PM, Thomas (Tweeks) Weeks <[log in to unmask]
> <[log in to unmask]>> wrote:
>
> I've seen a few videos and sites talking about PID based line following
> and balance bot applications.. but our kids just want to see a good example
> of straight line PID code (without trying to teach them calculus).
>
>
> I can do this in C, but I'm not savvy enough with the mindstorms GUI tools
> to show them how to do it in Lego.
>
>
> Tweeks
> ------------------------------
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