参数资料
型号: ST52E430B/D
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 20 MHz, MICROCONTROLLER, CDIP32
封装: WINDOWED, SHRINK, CERAMIC, DIP-32
文件页数: 29/120页
文件大小: 502K
代理商: ST52E430B/D
16/120
ST52T430/E430
2.4 FUZZY CAPABILITIES
ST52x430 Fuzzy main features are:
n
Up to 8 Inputs with 8-bit resolution;
n
1 Kbyte of Program Memory (EPROM) available
to store more than 300 to Membership
Functions (Mbfs) for each Input;
n
Up to 128 Outputs with 8-bit resolution;
n
Possibility to process fuzzy rules with an
UNLIMITED number of antecedents
n
UNLIMITED number of Rules and Fuzzy Blocks.
The limits on the number of Fuzzy Rules and fuzzy
Blocks are only related with the program memory
size.
2.4.1 Fuzzy Inference
The block diagram shown in figure 2.8 describes
the different steps performed during a fuzzy
algorithm. ST52x430 Core allows to implement a
MAMDANI type fuzzy inference with crisp
consequents. The input for the fuzzy inference are
stored in 8 dedicated Fuzzy input registers. The
instruction LDFR is used to set the input fuzzy
registers with the values stored in the RAM. The
1
Input Value
aij
j-th Mbf
i-th INPUT VARIABLE
Figure 2.7. Alpha Weight calculation
11
1m
n1
nm
FUZZYFICATION
INFERENCE
PHASE
DEFUZZYFICATION
Nrules
N rules -1
2
1
Input Values
Output Values
Figure 2.8. Fuzzy Inference
result of a fuzzy inference is directly stored in a
location of the RAM
2.4.2 Fuzzyfication Phase
In this phase is performed the intersection (alpha
weight) between the input values and the related
Mbfs (fig. 2.7).
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