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Author Mudi, R.K. ♦ Pal, N.R.
Sponsorship IEEE Computational Intelligence Society
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1993
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Robust control ♦ Fuzzy control ♦ Error correction ♦ Fuzzy logic ♦ Process control ♦ Tuning ♦ Analytical models ♦ Failure analysis ♦ Performance analysis ♦ Three-term control
Abstract Proposes a simple but robust model independent self-tuning scheme for fuzzy logic controllers (FLCs). Here, the output scaling factor (SF) is adjusted online by fuzzy rules according to the current trend of the controlled process. The rule-base for tuning the output SF is defined on error (e) and change of error (/spl Delta/e) of the controlled variable using the most natural and unbiased membership functions (MFs). The proposed self-tuning technique is applied to both PI- and PD-type FLCs to conduct simulation analysis for a wide range of different linear and nonlinear second-order processes including a marginally stable system where even the well known Ziegler-Nichols tuned conventional PI or PID controllers fail to provide an acceptable performance due to excessively large overshoot. Performances of the proposed self-tuning FLCs are compared with those of their corresponding conventional FLCs in terms of several performance measures such as peak overshoot, settling time, rise time, integral absolute error and integral-of-time-multiplied absolute error, in addition to the responses due to step set-point change and load disturbance and, in each case, the proposed scheme shows a remarkably improved performance over its conventional counterpart.
Description Author affiliation :: Dept. of Instrum. Eng., Jadavpur Univ., Calcutta, India
ISSN 10636706
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1999-02-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 7
Issue Number 1
Size (in Bytes) 487.21 kB
Page Count 15
Starting Page 2
Ending Page 16

Source: IEEE Xplore Digital Library