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: 31/120页
文件大小: 502K
代理商: ST52E430B/D
18/120
ST52T430/E430
wij =weight of the j-th singleton
Xij = abscissa of the j-th singleton
The fuzzy outputs are stored in the RAM location
i-th specified in the assembler instruction OUT i.
2.4.5 Input Membership Function
ST52x430 allows to manage triangular Mbfs. In
order to define a Mbf it is necessary to store three
different data on the program memory:
the vertex of the Mbf: V;
the length of the left semi-base: LVD;
the length of the right semi-base: RVD;
In order to reduce the size of the memory area and
the computational effort the vertical dimension of
the vertex is fixed to 15 (4 bits)
By using the previous memorization method it is
possible to store different kinds of triangular
Membership Functions. The figure 2.12 shows a
X
15
LVD
RVD
V
15
0
Input Mbf
Output Singleton
Output Variable
Input Variable
w
Figure 2.11. Mbfs Parameters
Figure 2.12. Example of valid Mbfs
typical example of Mbfs that can be defined in
ST52x430.
Each Mbf is then defined storing 3 bytes in the first
1 Kbyte of the memory program.
The Mbf is memorized by using the following
instruction:
MBF n_mbf lvd v rvd
where
n_mbf identifies the Mbf, lvd, v, rvd are the
parameters describing the Mbf’s shape.
2.4.6 Output Singleton
ST52x430 uses for the output variables a particular
kind of membership function called Singleton. A
Singleton has not a shape, like a traditional Mbf,
and it is characterized by a single point identified
by the couple (X, w), where the w is calculated by
the Inference Unit as described before.
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