Analog Fuzzy Controller Circuit Design For Control Applications  

Oleh:

Samman, Faizal A. ; Sadjad, Rhiza S.

Jenis: Article from Article
Dalam koleksi: Final Program and Book of Abstracts: The 4th Asian Control Conference, September 25-27, 2002 (Sep. 2002), page 1338-1343.
Topik: Fuzzy Controller ; Circuit Design; FLC; MFC; DFC; Control Applications
Fulltext: AC021745.PDF (239.19KB)

Isi artikel

Analog fuzzy controller circuit design for control applications is presented in this paper. The analog fuzzy logic controller (FLC) consists of three main cells; Membership function circuits (MFC), fuzzy inference circuit (FIC) and defuzzification circuit (DFC). All modules can be reconfigured to design a fuzzy controller circuit for control applications. The MFC has function to fuzzify or convert a crisp input into fuzzy input based on membership function of fuzzy linguistic term related to the input. This paper proposes fuzzification circuit, which can be reconfigured in term of its membership form, as well as its membership location in universe of discourse of the input voltage domain. The FIC can be reconfigured in term of the fuzzy rules determined by the controller designers in line with their fuzzy controller specification. The DFC presented in this paper avoids the use of op-amp divider and multipliers, which relatively use large design area. To substitute the use of division circuit, a new defuzzification circuit based on center of gravity method called a voltage follower-aggregation circuit configuration is proposed. The main features of those modular circuits result in flexible and high-speed circuit configuration, and makes them available to configure a fuzzy logic controller circuit for wider and real-time control application areas.

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