Self-organizing fuzzy logic control

Self-Organizing Fuzzy Logic Control (SOFLC) is an optimization strategy to create and modify the control rulebase for a FLC as a result of observed system performance. The SOFLC is particularly useful when the plant is subject to time-varying parameter changes and unknown disturbances. 

A SOFLC is a two-level hierarchical control system that is comprised of  

If the numerieal strueture of the fuzzy rulebase does not give an aeeeptable response, then the values in eertain eells will need to be adjusted. 

If there are unaeeeptable errors at time t, beeause of the dynamies of the plant, these will be as a result of eontrol aetion taken d seeonds previously, or at time t — d). The parameter r/ is a delay in reward parameter and is related to the settling time of the plant, having a typieal value of between iT and 5T, where T is the dominant time eonstant of the plant. 

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Fig. 10.17 Self-Organizing Fuzzy Logic Control system.

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