Font Size: a A A

Automatic Generation Of Fuzzy Rules Based On Fuzzy Neural Network

Posted on:1998-12-05Degree:MasterType:Thesis
Country:ChinaCandidate:J WangFull Text:PDF
GTID:2208360185495482Subject:Computer organization and system architecture
Abstract/Summary:PDF Full Text Request
As the rapid development of fuzzy logic and fuzzy control, the extraction of fuzzy rules becomes an important step for the application of fuzzy technology. Because there exist many difficulties about summarizing rules by human, people have paid more and more interest in the researches for the fuzzy rules' automatic generating methods. Among those methods, an effective one is using fuzzy neural network to learn fuzzy rules.Fuzzy neural network, which is combined of the ideas of neural network and fuzzy logic, inherits not only the neural network's abilities of self-learning, self-organizing, self-adapting and self-tuning, but also the fuzzy logic's ability of expressing human's advanced summarizing knowledge .Therefore, it is more suitable for learning fuzzy rules than the other methods.In this paper, we first give a survey of present fuzzy rules' automatic generating methods' advantages and disadvantages. Then, referring to the researches of other people, we propose a fuzzy neural network model which is suitable for the fuzzy logic control and then, use it to learn fuzzy control rules.Our fuzzy neural network algorithm includes three parts: the first one is the fuzzy partitioning of the input space; the second one is the construction of fuzzy neural network; and the third is the parameter-tuning of the network. During the fuzzy partitioning of the input space, we first determined the local maximum and minimum points of the control surface by the concept of k-nearest-neighbor. Second, we delete false ones and only keep the key ones after the necessary selection. Then we make our initial fuzzy partitions basing on those key points. Because fuzzy control is a kind of function fitting in essence, the fuzzy partitions we obtain by...
Keywords/Search Tags:Fuzzy neural network, BP algorithm, Fuzzy control, Fuzzy logic, Fuzzy rules'automatic generating
PDF Full Text Request
Related items