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06/22/00 22:41
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#3368 - RE: Need a PID routine and some info
The expression comes from the iterative algorithm that Intel have used to implement the equation, You have a series of velocity errors, the current V error, the last V error, the previous V error.

The differential term in a PUD algorithm is usually very nasty. It tends to destabilise the servo loop if there is too much noise, as there can be if you naievely sample two successive data points and "find the slope"

Personally, I've never had to write the whole thing, my technician has done it, using a book by Astrom and Wittenmark as his primary reference.

Steve.



List of 11 messages in thread
TopicAuthorDate
Need a PID routine and some info            01/01/70 00:00      
RE: Need a PID routine and some info            01/01/70 00:00      
   Need a PID routine and some info            01/01/70 00:00      
PID Algorithm: Intel AN 428            01/01/70 00:00      
   Dead Links- Jay C.Box            01/01/70 00:00      
      RE: Dead Links- Jay C.Box            01/01/70 00:00      
         RE: Dead Links- Jay C.Box            01/01/70 00:00      
            RE: Dead Links- Jay C.Box            01/01/70 00:00      
Article on PID            01/01/70 00:00      
RE: Need a PID routine and some info            01/01/70 00:00      
RE: Article on PID            01/01/70 00:00      

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