Grammatical Evolution for Neural Network Optimization in the Control System Synthesis Problem

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Abstract

Grammatical evolution is a perspective branch of the genetic programming. It uses evolutionary algorithm based search engine and Backus – Naur form of domain-specific language grammar specifications to find symbolic expressions. This paper describes an application of this method to the control function synthesis problem. Feed-forward neural network was used as an approximation of the control function, that depends on the object state variables. Two-stage algorithm is presented: grammatical evolution optimizes neural network structure and genetic algorithm tunes weights. Computational experiments were performed on the simple kinematic model of a two-wheel driving mobile robot. Training was performed on a set of initial conditions. Results show that the proposed algorithm is able to successfully synthesize a control function.

Keywords

grammatical evolution
control system synthesis
artificial neural networks

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Peer-review under responsibility of the scientific committee of the XIIth International Symposium “Intelligent Systems”.