Method and arrangement for adapting a sliding mode fuzzy control

Details Method and arrangement for adapting a sliding mode fuzzy control Method and arrangement for adapting a sliding mode fuzzy control

1997-02-21

1999-11-23

Elmore, Reba I.

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364152, 706 14, 706 3, 706 4, 706 8, 395 3, G05B 1302, G06G 700

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059888482

ABSTRACT:
In a method and arrangement for adapting a sliding mode fuzzy controller to destabilizing changes, control characteristics of the sliding mode fuzzy controller, a closed control loop, are characterized by linguistic variables and are interpreted using linguistic rules in an adaptation block in the control loop which also employs fuzzy control. The rules are configured such that an optimally fast approach of a momentary state condition to the switching line or switching surface of the sliding controller occurs. For adaptation, supporting points are defined in the characteristic of the sliding mode fuzzy controller and these are shifted for the purpose of a desired control behavior, such as by variation of the output fuzzy sets. A separate fuzzy rule set is thus designed for each individual support point.

REFERENCES:
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patent: 5247432 (1993-09-01), Ueda
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D.S. Reay, et al., "On the Appropriate Uses of Fuzzy Systems: Fuzzy Sliding Mode Position Control of a Switched Reluctance Motor", Proceedings of the 1995 IEEE International Symposium of Intelligent Control, Aug. 27, 1995, USA, XP000671297, pp. 371-376.
A. Trebi et al., "A Direct Adaptive Fuzzy SMC", Proceeding s of the 1995 IEEE International Conference on Fuzzy Systems, XP 000671296, Mar. 20, 1995, pp. 1979-1986.
H. Allamehzadeh et al., "Design and Stability Analysis of a Fuzzy Sliding Mode Controller", Intelligent Engineering Systems Through Artificial Neural Networks, XP 000671299, Nov. 12, 1995, pp. 557-562.
R. Palm, "Robust Control by Fuzzy Sliding Mode", Automatica, vol. 30, No. 9, pp. 1429-1437, 1994.
J. Kahlert, "Fuzzy Control" fur Ingenieure.

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