Tuning PDF loop (pseudo derivative feedback)

On Sun, 19 Jan 2014 16:09:39 -0700, the renowned Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>On Sun, 19 Jan 2014 14:37:21 -0800 (PST), gyansorova@gmail.com wrote:
>
>>On Monday, January 20, 2014 9:16:56 AM UTC+13, Spehro Pefhany wrote:
>>> On Sun, 19 Jan 2014 11:14:23 -0800 (PST), the renowned
>>> 
>>> gyansorova@gmail.com wrote:
>>> 
>>> 
>>> 
>>> >
>>> 
>>> >Actually wrong, it's the academics that perpetuate the PID rubbish.
>>> 
>>> 
>>> 
>>> I have yet to see a real controls academic that considers PID remotely
>>> 
>>> interesting. Maybe at trade schools, check your matchbook covers. 
>>> 
>>> 
>>> 
>>> 
>>
>>Well you're talking about the fancy research stuff, but students still need to know the basics too and I gather they do all learn about PID and a little of the lag-lead stuff which is far more of use. Trades people aren't much use because they don't know what's going on most of the time, though I am sure they could tune a PID. Academics will draw you a root-locus some of the time of course which is totally useless! You don't need fancy control algorithms for most small problems but for some (eg control of the Euro-fighter and missile guidance) the modern stuff does get used, so don't knock it. Amateurs are even using Kalman filters in embedded systems nowadays (for inertial measurement). In the 1970s these were Ph.D topics.
>>
>
>Real men use a Nichol's chart >:-}
>		
>                                        ...Jim Thompson

I'm pretty sure PID is in there between Locksmithing and Small Engine
Repair. 



Best regards, 
Spehro Pefhany
-- 
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On Sun, 19 Jan 2014 18:41:10 -0500, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

>On Sun, 19 Jan 2014 16:09:39 -0700, the renowned Jim Thompson
><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:
>
[snip]
>>
>>Real men use a Nichol's chart >:-}
>>		
>>                                        ...Jim Thompson
>
>I'm pretty sure PID is in there between Locksmithing and Small Engine
>Repair. 
>
>
>
>Best regards, 
>Spehro Pefhany

Reminds me of when a ran my power mower over a sewer clean-out and
bent the crank :-(

Bought a new crank and piston assembly from Sears (this would have
been around 1963) and put the thing back together.  But I couldn't get
it all to cinch up properly, so I started it up anyway, then tightened
up the head, etc.  Ran perfectly after that ;-)
		
                                        ...Jim Thompson
-- 
| James E.Thompson                                 |    mens     |
| Analog Innovations                               |     et      |
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I love to cook with wine.     Sometimes I even put it in the food.

Jim Thompson wrote:
> 
> Real men use a Nichol's chart >:-}


   And know how to use a blue wrench. :)


-- 
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.