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| 型号： | ST52T430K3T6 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PQFP32 |
| 封装： | TQFP-32 |
| 文件页数： | 38/88页 |
| 文件大小： | 1162K |
| 代理商： | ST52T430K3T6 |
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Figure 7.5 Example of valid Mbfs
7.6 Output Singleton
The Decision Processor uses a particular kind of
membership function called Singleton for its output
variables. A Singleton doesn’t have a shape, like a
traditional Mbf, and is characterized by a single
point identified by the couple (X, w), where w is
calculated by the Inference Unit as described
earlier. Often, a Singleton is simply identified with
its Crisp Value X.
Figure 7.6 Output Membership Functions
7.7 Fuzzy Rules
Rules can have the following structures:
if A op B op C...........then Z
if (A op B) op (C op D op E...) ...........then Z
where
op is one of the possible linguistic operators
(AND/OR)
In the first case the rule operators are managed
sequentially; in the second one, the priority of the
operator is fixed by the brackets.
Each rule is codified by using an instruction set, the
inference time for a rule with 4 antecedents and 1
consequent is about 3 microseconds at 20 MHz.
The Assembler Instruction Set used to manage the
Fuzzy operations is reported in the table below.
1
i-th OUTPUT
0
X
ij
X
i0
X
in
ω
i0
ω
ij
ω
in
j-th Singleton
Table 7.1 Fuzzy Instructions Set
Instruction
Description
MBF
n_mbf Ivd v rvd
Stores the Mbf
n_mbf with the shape identified by the parameters Ivd, v and rvd
LDP
n m
Fixes the alpha value of the input
n with the Mbf m and stores it in internal registers
LDN
n m
Calculates the complementary alpha value of the input
n with the Mbf m. and stores the result
in internal registers
FZAND
Implements the Fuzzy operation AND between the last two values stored in internal registers
FZOR
Implements the Fuzzy operation OR between the last two values stored in internal registers
LDK
Stores the result of the last Fuzzy operation executed in internal registers
SKM
Loads the result of the last performed Fuzzy operation (stored in the temporary register K) in
the temporary buffer M.
LDM
Copies the value of register M in the data stack
CON
crisp
Multiplies the
crisp value with the last
ω weight
OUT
n_out
Performs Defuzzyfication and stores the currently Fuzzy output in the RAM
n_out location
FUZZY
Starts the Fuzzy algorithm
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