A method for the identification of complex non-linear dynamics of a multi-link robot manipulator using Runge-Kutta-Gill Neural Networks (RKGNNs) in the absence of input torque information is proposed. The RKGNNs constructed using shape adaptive radial basis functions (RBF) are trained using an evolutionary algorithm. Due to the fact that the main function network is devided into sub-networks to represent detailed properties of the dynamics of a manipulator, the neural networks have greater information processing capacity and they can be tested for properties such as positive definiteness of the inertia matrix. Dynamics of a three-link manipulator are identified using only input-output position and their velocity data, and promising control results are obtained to prove the ability of the proposed method in capturing highly nonlinear dynamics of a multi-link manipulator in an effective manner.
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