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Fuzzy reasoning coprocessor

A technology of fuzzy inference and coprocessor, applied in the fields of electrical digital data processing, digital data processing components, instruments, etc., can solve problems such as difficulty in improving the accuracy of functions and limitations in the flexibility of fuzzy function representation

Inactive Publication Date: 2002-10-23
宁波中科集成电路设计中心有限公司
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Problems solved by technology

The table storage method can simplify the input fuzzy operation, but it is difficult to improve the accuracy of the function due to the limitation of storage capacity
One of the parameter description methods is that the domain of discourse is segmented to represent the local shape of each membership function, which is conducive to the realization of input fuzzification, but the flexibility of fuzzy function representation is limited

Method used

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Embodiment Construction

[0036] 1. Fuzzy reasoning method

[0037] The fuzzy controller adopts the principle of a typical fuzzy reasoning system as follows. Sampling data from the controlled process (object) is used as the clear quantity input to the fuzzy controller. After calculating the input scale factor, the input is fuzzified and converted into fuzzy quantity, and then fuzzy reasoning is carried out with fuzzy rules. The inference result output is converted into a clear quantity through defuzzification, and the output scale factor is calculated to obtain the control output, which is used as the control action of the controlled process at the corresponding sampling time; for the hierarchical structure fuzzy inference process, an output variable can also be used as the next level of fuzzy Input variables for inference. Fig. 1 shows the fuzzy inference algorithm flow used by the present invention. Among them, the scale factor calculation and fuzzification are completed for all inputs, and then fu...

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Abstract

The present invention relates to a fuzzy reasoning coprocessor, including: fuzzy reasoning machine which features that its algorithm flow chart includes input scale factor computation, input fuzzing,fuzzy reasoning, output anti-fuzzing and output scale factor computation; fuzzy knowledge base containing rule, membership functiona nd scale factor, which is the basis of whole fuzzy reasoning process; I / O buffer memory for storing controller input and output variables and intermediate data in the fuzzy reasoning process; and main processor interface, which is in charge of the coordination work between fuzzy reasoning coprocessor and main processor.

Description

technical field [0001] The invention relates to a fuzzy reasoning system, in more detail, to a fuzzy reasoning co-processor which adopts digital circuit technology and is suitable for making VLSI. Background technique [0002] The fuzzy controller adopts a fuzzy inference system, including fuzzy inference rules determined by experience or operating data, variable input and output scaling factors, and membership functions of corresponding fuzzy variables. According to these fuzzy rules, through fuzzy reasoning, the corresponding control variable output is obtained from the current control variable input, so as to complete the control function of the fuzzy controller. [0003] The performance of the fuzzy controller depends on the function of the fuzzy inference system. Including inference methods, definitions of rules and membership functions, scaling factors, and the working status of the entire control system. The fuzzy reasoning system of the invention satisfies the desi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F7/00G06F9/44H03K19/00
Inventor 沈理
Owner 宁波中科集成电路设计中心有限公司
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