Fuzzy control method based on adaptive domain partitioning

A fuzzy control and self-adaptive technology, applied in the direction of self-adaptive control, general control system, control/regulation system, etc., can solve the problem that dynamic objects are difficult to reflect real-time categories, so as to improve the control accuracy, improve the accuracy, and enhance the elastic space. Effect

Active Publication Date: 2015-10-21
CENT SOUTH UNIV
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Problems solved by technology

This classification method can basically meet the classification requirements of stat

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  • Fuzzy control method based on adaptive domain partitioning
  • Fuzzy control method based on adaptive domain partitioning
  • Fuzzy control method based on adaptive domain partitioning

Examples

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Embodiment 1

[0063] Let the current furnace temperature be T, and let the entire range of temperature T be [x, y] during the entire processing process. T ∈ [x, y].

[0064] The interval [x,y] is mapped to the interval [0,b], where b=y-x. For a furnace temperature value T in the interval [x, y], the value w mapped to the interval [0, b] is: w=T-x.

[0065] Assuming that in the process of processing, the fuzzy language variables defined for the temperature level are "high temperature (PB)", "medium temperature (PM)" and "low temperature (PS)". Here, the language variables of high and low temperature are divided according to the current temperature range in which they are located. The specific rules are as follows:

[0066] (1) w ∈ [0.8*b, b]

[0067] At this time, the membership function value f(w) of "high temperature (PB)" is:

[0068] f ( w ) = 1 ...

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Abstract

The invention discloses a fuzzy control method based on adaptive domain partitioning, comprising the following steps: step 1, domain partitioning is carried out, wherein the change interval [x, y] of a controlled variable T is used as a domain interval, x and y are respectively the lower limit and upper limit of the controlled variable, the domain interval is divided into multiple sub intervals, and a fuzzy subset and each element (namely, a membership function of a fuzzy language variable) in the fuzzy subset are defined for each sub interval; and step 2, a controlled object is controlled by adopting a module control strategy and based on the fuzzy subsets and the membership functions in step 1. The fuzzy control method based on adaptive domain partitioning is easy to implement and high in flexibility, and can effectively improve the control effect.

Description

technical field [0001] The invention relates to a fuzzy control method based on adaptive domain division. Background technique [0002] The first task of fuzzy classification is the division of fuzzy domain. But the division of the traditional fuzzy domain is completed at the initial stage of recognition. Once determined, it is generally not changed in the subsequent process. This division mode cannot add new knowledge. It cannot reflect the interactivity of the division process. The classification results are rough and the control effect is limited. [0003] In existing classification techniques, domain division is static. Once the object to be classified is assigned to a certain category, it is generally not changed. This classification method can basically meet the classification requirements of static objects, but it is difficult to reflect the real-time category of dynamic objects. [0004] Therefore, it is necessary to design a new fuzzy control method. Conten...

Claims

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Application Information

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IPC IPC(8): G05B13/02
Inventor 龙军胡扬杨柳
Owner CENT SOUTH UNIV
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