參數(shù)資料
型號(hào)： ST52510F3M6
廠商： STMICROELECTRONICS
元件分類(lèi)： 微控制器/微處理器
英文描述： MICROCONTROLLER, PDSO20
封裝： SOP-20
文件頁(yè)數(shù)： 91/136頁(yè)
文件大?。?/td> 3335K
代理商： ST52510F3M6
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8 FUZZY COMPUTATION (DP)
The ST52F510/F513 Decision Processor (DP)
main features are:
■ Up to 8 Inputs with 8-bit resolution;
■ 1 Kbyte of Program/Data Memory available to
store more than 300 to Membership Functions
(Mbfs) for each Input;
■ Up to 128 Outputs with 8-bit resolution;
■ Possibility of processing fuzzy rules with an
UNLIMITED number of antecedents;
■ UNLIMITED number of Rules and Fuzzy Blocks.
The limits on the number of Fuzzy Rules and
Fuzzy program blocks are only related to the
Program/Data Memory size.
8.1 Fuzzy Inference
The block diagram shown in Figure 8.1 describes
the different steps performed during a Fuzzy
algorithm. The ST52F510/F513 Core allows for the
implementation of a Mamdami type fuzzy inference
with crisp consequents. Inputs for fuzzy inference
are stored in 8 dedicated Fuzzy input registers.
The LDFR instruction is used to set the Input Fuzzy
registers with values stored in the Register File.
The result of a Fuzzy inference is stored directly in
a location of the Register File.
8.2 Fuzzyfication Phase
In this phase the intersection (alpha weight)
between the input values and the related Mbfs (see
Figure 8.2) is performed.
Eight Fuzzy Input registers are available for Fuzzy
inferences.
Figure 8.1 Fuzzy Inference
Figure 8.2 Alpha Weight Calculation
After loading the input values by using the LDFR
assembler instruction, the user can start the fuzzy
inference by using the FUZZY assembler
instruction. During fuzzyfication: input data is
transformed in the activation level (alpha weight) of
the Mbf’s.
8.3 Inference Phase
The Inference Phase manages the alpha weights
obtained during the fuzzyfication phase to compute
the truth value (
ω) for each rule.
This is a calculation of the maximum (for the OR
operator) and/or minimum (for the AND operator)
performed on alpha values according to the logical
connectives of Fuzzy Rules.
Several conditions may be linked together by
linguistic connectives AND/OR, NOT operators
and brackets.
The truth value
ω and the related output singleton
are used by the Defuzzyfication phase, in order
to complete the inference calculation.
11
1m
n1
nm
FUZZYFICATION
INFERENCE
PHASE
DEFUZZYFICATION
N rules
N rules -1
2
1
Input Values
Output Values
1
αij
j-th Mbf
i-th INPUT VARIABLE
相關(guān)PDF資料
PDF描述
ST52E430B/D 8-BIT, UVPROM, 20 MHz, MICROCONTROLLER, CDIP32
ST52F510F1M6 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PDSO20
ST52F510G0B6 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PDIP28
ST52F513F0M6 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PDSO20
ST52F513F1B6 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PDIP20
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