Jump to content

Talk:Ziegler–Nichols method

Page contents not supported in other languages.
From Wikipedia, the free encyclopedia

Comments

[edit]

The article says it is a "foolish" method, which doesn't strike the right objective tone. 24.247.30.21 (talk) 11:23, 26 October 2009 (UTC)[reply]

That was vandalism by an anonymous user. Thanks for reverting it. User A1 (talk) 13:08, 26 October 2009 (UTC)[reply]

What it is: "I gain" and "D gain"? May I set that "I gain" to zero? wp —Preceding unsigned comment added by 77.52.188.102 (talk) 12:06, 21 July 2010 (UTC)[reply]

I added the definitions of "I" and "D" to the article. Setting them to zero means you end up with a purely proportional controller (see the PID article)User A1 (talk) 16:17, 21 July 2010 (UTC)[reply]

Ziegler-Nichols Method Ki and Kd Values Incorrect in Table

[edit]

The Ki and Kd values in the Ziegler-Nichols method table are incorrect! The Ki values are pulled from the tuning parameters for a PI controller and the Kd values are pulled from the tuning parameters using the Pessen Integral Rule. The correct value for Ki should be "Ki = Kp / (Pu / 2)" or more simply "Ki = (2 * Kp) / Pu". The correct value for Kd should be "Kd = Kp * (Pu / 8)". You can reference both the Ziegler Nichols wikipedia page (https://wiki.riteme.site/wiki/Ziegler%E2%80%93Nichols_method) or Microstar Laboratories (http://www.mstarlabs.com/control/znrule.html) to see the evidence of these errors. I would solve this issue myself, but I don't understand how the table formatting works. (December 17, 2018 - 1:52 AM MST)

Integral definition

[edit]

Hello,

There is currently an apparent conflict between the microstart article and the Ziegler-Nichols paper/mtu site. This comes from the questionof whether you are factoring out the kp in your definitions of Ki and Kd. This article should state the form of the equation to clarify this, rather than bouncing between the various definitions . User A1 (talk) 21:46, 12 August 2010 (UTC)[reply]

---

Under evaluation - isnt statement 2 and 3 contradictionar?

--- the formula integrates e(tau) dtau

should integrate e(t) dt — Preceding unsigned comment added by 46.102.221.58 (talk) 14:44, 16 March 2017 (UTC)[reply]

Form of the controller

[edit]

It isn't clear which form has the controller's output u(t), because there can be several ways of denoting the parameters, for instance:

or

or

etc. So, ¿anyone knows what is the correct one for the table? — Preceding unsigned comment added by 201.239.9.163 (talk) 23:52, 30 December 2011 (UTC)[reply]

Multiple methods

[edit]

There are apparently multiple methods proposed by Ziegler Nichols. Only one is documented in the article. Here's a simple explanation of another - Jinghua Zhong (Spring 2006). "PID Controller Tuning: A Short Tutorial" (PDF). Retrieved 2011-04-04. {{cite journal}}: Cite journal requires |journal= (help) --Kvng (talk) 14:54, 7 June 2012 (UTC)[reply]

+1 There are two very different methods with the Ziegler–Nichols name. The closed loop method described here and one based on the open loop step response. --Ulrich67 (talk) 17:46, 26 March 2014 (UTC)[reply]
[edit]

Hello fellow Wikipedians,

I have just modified one external link on Ziegler–Nichols method. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{Sourcecheck}}).

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).

  • If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
  • If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 19:18, 20 July 2016 (UTC)[reply]