RBF Based Neural Fuzzy Network

• Main Authors: Ju-Yi Huang, 黃朱瑜
• Other Authors: Gou-Jen Wang
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/14967502279792003745

碩士 === 國立中興大學 === 機械工程學系 === 87 === Abstract In this thesis, a new neural fuzzy configuration that combines the RBF neural network structure and fuzzy logic theory is proposed. In this new neural fuzzy structure, the conventional six layers neural fuzzy network is simplified to a four layers neural fuzzy network. For single input problem, this new network structure is a kind of RBF neural network. When a multi-inputs problem is applied, it functions similar a conventional neural fuzzy network. Computer simulation results show that the proposed new neural fuzzy scheme can be successfully applied to the nonlinear function approximation and classification problems. To fulfill the on-line training requirement, an efficient heuristic learning rule is included. Experimental results show that the proposed approach can be successfully applied to the precise regulating and tracking problems of an AC servo motor system. For real industrial application, a systematic approach to achieve global optimal CMP process is carried out. In this new approach, orthogonal array technique in the Taguchi method is adopted for efficient experiment design. The RBFNF neural-fuzzy is then used to model the complex CMP process. Signal to Noise Ratio (S/N) Analysis technique used in the conventional Taguchi method is also implemented to find the local optimal process parameters. Successively, the global optimal parameters are acquired in terms of the trained RBFNF network. In order to increase the CMP throughput, a two-stage optimal strategy is also proposed. Experimental results show that the two-stage strategy can perform better then the original approach even though the process time is reduced by 1/6.