DocumentCode :
301382
Title :
An investigation of the effects of fuzzy resolution on control inference using explicit relationships
Author :
Wickramarachchi, N. ; de Silva, C.W.
Author_Institution :
Dept. of Mech. Eng., British Columbia Univ., Vancouver, BC, Canada
Volume :
1
fYear :
1995
fDate :
22-25 Oct 1995
Firstpage :
829
Abstract :
The number of partitions or fuzzy states that exist in a fuzzy variable determines the resolution of that variable. This paper investigates the effect of fuzzy resolution on the control action that is derived from a fuzzy-control rulebase. First, it is shown that some explicit relationships could be derived for the inference from a fuzzy rulebase in terms of input variables and known geometry of the membership functions. These relationships are established for a generic, single-input-single-output (SISO) fuzzy control rulebase that employs uniform triangular membership functions. Specifically, a formula for control action u is derived in terms of incremental input variable and corresponding membership grades and fuzzy resolution. The result is then extended to include global variations of the input variable. It is argued that the resulting equations could be used to demonstrate the applicability of fuzzy control rules in a wide variety of control situations. Also some useful properties that arise from these equations are identified
Keywords :
fuzzy control; fuzzy logic; fuzzy set theory; inference mechanisms; intelligent control; SISO fuzzy control rulebase; control inference; fuzzy logic; fuzzy resolution; fuzzy set theory; fuzzy states; fuzzy variable; membership functions; Automatic control; Automation; Equations; Fuzzy control; Fuzzy logic; Fuzzy sets; Industrial control; Input variables; MIMO; Mechanical variables control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Systems, Man and Cybernetics, 1995. Intelligent Systems for the 21st Century., IEEE International Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-2559-1
Type :
conf
DOI :
10.1109/ICSMC.1995.537868
Filename :
537868
Link To Document :
بازگشت