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Hierarchical Genetic Algorithm based RBF Neural Networks and Application for Modelling of the Automatic Depth Control Electrohydraulic System

Zong-yi Xing, Xue-miao Pang, Hai-yan Ji, Yong Qin, and Li-min Jia
International Journal of Control, Automation, and Systems, vol. 9, no. 4, pp.759-767, 2011

Abstract : The paper presents an approach to model nonlinear dynamic behaviors of the Automatic Depth Control Electrohydraulic System (ADCES) of a certain minesweeping weapon with Radial Basis Function (RBF) neural networks trained by hierarchical genetic algorithm. In the proposed hierarchical genetic algorithm, the control genes are used to determine the number of hidden units, and the parameter genes are used to identify center parameters of hidden units. In order to speed up conver-gence of the proposed algorithm, width and weight parameters of RBF neural network are calculated by linear algebra methods. The proposed approach is applied to the modelling of the ADCES, and ex-perimental results clearly indicate that the obtained RBF neural network can emulate complex dynamic characteristics of the ADCES satisfactorily. The comparison results also show that the proposed approach performs better than the traditional clustering-based method.

Keyword : Electrohydraulic system, genetic algorithm, modelling, neural network.

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