LabVIEW PID uses derivative of Process Variable

For We Will Rock You, we quit counting Saturday morning when it got to 12 times. - Gary Dillard [more]

		Chief Delphi > Technical > Programming > NI LabVIEW
LabVIEW PID uses derivative of Process Variable

Thread Tools

Rating:

Display Modes

04-01-2011, 02:59

kamocat

Test Engineer

AKA: Marshal Horn

FRC #3213 (Thunder Tech)

Team Role: Mentor

Join Date: May 2008

Rookie Year: 2008

Location: Tacoma

Posts: 894

Re: LabVIEW PID uses derivative of Process Variable

You're right, that doesn't make sense.
Perhaps that error wasn't caught because people don't use very large coefficients for Derivative, and this VI is not very maintainable.

If the intent is to get rid of noise in the Setpoint (that is, variation in the Setpoint much faster than the mechanism can respond), then the 2nd derivative of the PV could be used.

__________________
-- Marshal Horn

« Previous Thread | Portal | Next Thread »

Thread Tools
Show Printable Version Email this Page
Display Modes	Rate This Thread
Switch to Linear Mode Switch to Hybrid Mode Threaded Mode	Rate This Thread:

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts vB code is On Smilies are On [IMG] code is On HTML code is Off

Forum Jump

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Labview PID	Gary Bonner	NI LabVIEW	1	18-02-2010 20:31
Traction control: How do I tune a PID controller with variable gain?	windell747	Programming	17	22-03-2009 21:18
How do i find a variable and use it on Labview	Chris11246	NI LabVIEW	23	21-01-2009 17:50
Variable rollover with Labview (suggestions?)	kamocat	NI LabVIEW	7	22-08-2008 08:30
Two variable PID? I know someone's done it =)...	Mr. Lim	Programming	4	29-08-2006 00:31

All times are GMT -5. The time now is 04:22.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.