A hybrid clustering and gradient descent approach for fuzzymodeling |
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Authors: | Ching-Chang Wong Chia-Chong Chen |
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Affiliation: | Dept. of Electr. Eng., Tamkang Univ., Tamsui. |
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Abstract: | In this paper, a hybrid clustering and gradient descent approach is proposed for automatically constructing a multi-input fuzzy model where only the input-output data of the identified system are available. The proposed approach is composed of two steps: structure identification and parameter identification. In the process of structure identification, a clustering method is proposed to provide a systematic procedure to determine the number of fuzzy rules and construct an initial fuzzy model from the given input-output data. In the process of parameter identification, the gradient descent method is used to tune the parameters of the constructed fuzzy model to obtain a more precise fuzzy model from the given input-output data. Finally, two examples of nonlinear system are given to illustrate the effectiveness of the proposed approach. |
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