关键词: 小波网络 , 非均匀分布 , 小波多分辨分析 , 网格系

Abstract: In the identilication of nonlinear system, the system inputs are usually non-uniformly distributed. The approach using orthogonal wavelet networks to resolve the problem is complex. Tins paper presents two approximative methods based on wavelet grid structure to handle this problem sim?ply and effectively. The advantages of these methods are computationally efficient and easy to use. fi?nally ，nonlinear systems are identified. The results of simulation show that the provided methods are effective and feasible.

Key words: wavelet network , non-uniform distribution , wavelet multiresolution analysis , grid structure