Talk:Fuzzy control system

message: The link for "Introduction to Fuzzy Control Engineering" no longer exists (http://inside.mines.edu/~msimoes/tutorials/Introduction_fuzzy_logic/Intro_Fuzzy_Logic.pdf).  If this is an inappropriate method for notify editors of a broken link, I apologize in advance.
Jcwren (talk) 00:20, 4 May 2010 (UTC)
replies: text: Just for acknowledgment, this issue is already solved91.117.255.247 (talk) 15:03, 21 March 2014 (UTC)
thread_title:  Broken link 

message: In the section "Fuzzy Sets" the author has made a reference to the PID controller and has put forward the obvious question: why do we need fuzzy controller. I think the answer is far from being scientific or true. If one has a low resolution analog digital converter the input of the PID controller will be within this resolution. If you can measure the temperature of a break with a resolution of 1/4 then you would have a low resolution input to your PID controller. Again if your actuator can move only within a space of four steps then your output will be a number between 1 and 4. Suggesting that fuzzy control's advantage is that it is suitable for cheap and low resolution systems is total nonsense.   The suggestion that "a mathematical model of the control process may not exist, or may be too "expensive" in terms of computer processing power and memory" sounds childish. What expense would there be in calculating a z-transformation of a PID controller and implementing a digital controller which will have to keep the 4th or 5th past values in its memory??? --Zama Zalotta 10:01, 6 February 2007 (UTC)
replies: text: I've been looking for some insights in this question, I think this document is a very good response. Furthermore, another point of view may be in the complexity to build from scratch a new control system using any of this tecnologies. 91.117.255.247 (talk) 11:31, 21 March 2014 (UTC)
thread_title:  PID vs Fuzzy 

message: Well-written article. What should be underscored is that there are two constructs which play pivotal roles in fuzzy control and, more generally, in most applications of fuzzy logic. They are (a) the concept of a linguistic variable; and (b) the calculus of fuzzy-if-then rules. These constructs were introduced in my 1973 paper, "Outline of a new approach to the analysis of complex systems and decision processes," IEEE Transactions on Systems, Man and Cybernetics SMC-3, 28-44, 1973, and my 1974 paper, "On the analysis of large scale systems," Systems Approaches and Environment Problems, H. Gottinger (ed.), 23-37. Gottingen: Vandenhoeck and Ruprecht, 1974. It is of historical interest to note that the concept of linguistic variable was greeted with skepticism and derision. On hearing my first presentation in France in 1972, Rudy Kalman (Kalman filtering) said, "I would like to comment briefly on Professor Zadeh’s presentation. His proposals could be severely, ferociously, even brutally criticized from a technical point of view. This would be out of place here. But a blunt question remains: Is Professor Zadeh presenting important ideas or is he indulging in wishful thinking?" Fuzzy logic and fuzzy control have survived such comments, including highly critical comments by the control systems establishment.
A metric of the impact of fuzzy logic is the number of papers and books with "fuzzy" in title. The following information was compiled by Camille Wanat, Engineering Librarian, UC Berkeley, March 13, 2007.
INSPEC Database - "fuzzy" in the title
1970-1979:   569
1980-1989:   2,403
1990-1999:   23,214
2000-present: 24,910
Total:   51,096
 
MathSciNet Database - "fuzzy" in the title
1970-1979:   443
1980-1989:   2,465
1990-1999:   5,487
2000-present: 6,217
Total:   14,612
 
--Lotfi A. Zadeh 01:23, 15 March 2007 (UTC)
thread_title: Linguistic Variable

message: this note is only to alert potentially interested editors, you can delete after a week or so Power.corrupts (talk) 23:40, 21 January 2009 (UTC)
thread_title:  [[Type-2 fuzzy sets and systems]] - what do you think of this article, ready for deletion? 

message: isn't it a good thing if this article reads like a textbook? Wouldn't that be a welcome change from the over-the-top ramblings of self-appointed experts? Owen214 (talk) 13:18, 8 November 2010 (UTC)
replies: text: Tor textbooks there is Wikibooks. Wikipedia is an encyclopedia.--Bomberzocker (talk) 12:39, 10 February 2018 (UTC)
replies: text: Wikibooks is totally unrelated. An encyclopedia is a collection of knowledge. Technical subjects very often lack detailed knowledge in their articles. I think it is very good that this article goes trough all detailed steps as a textbook. --Talianos「talk」 08:39, 18 March 2019 (UTC)
thread_title:  hilarious warning 

message: This article could use a real-world (i.e. outside of academia) perspective, e.g. based on  Tijfo098 (talk) 17:38, 13 April 2011 (UTC)
thread_title:  Real world 

message: There is a block diagram missing after the sentence, "As a general example, consider the design of a fuzzy controller for a steam turbine. The block diagram of this control system appears as follows:"
Jsauter (talk) 16:11, 26 January 2013 (UTC)
thread_title:  Missing Diagram 

message: The article is referencing under the current id #4 to a paper, written by Lotfi Zadeh. It is “Outline of a new approach to the analysis of complex systems and decision processes”. Even if the paper supports the statement, that linguistic variables are defining a fuzzy set, the reference is a poor choice. It was published in a highly specialized cybernetics journal which is “IEEE Transactions on Systems, Man and Cybernetics.” Except from technical experts, nobody else has subscribed to this journal. Second problem is, that the article was never used in an introduction course at the university to teach control theory. If no counter argument is provided why this reference is highly important, i will delete it in the near future.--ManuelRodriguez (talk) 10:41, 17 November 2020 (UTC)
thread_title:  Announcement to remove a reference