Control of a Robotic Manipulator Using Artificial Neural Networks with On-line Adaptation

Authors:
Roselito A. Teixeira;Antônio De P. Braga;Benjamim R. De Menezes
Affiliations:
Instituto Católico de Minas Gerais, Coronel Fabriciano, MG, Brazil. E-mail: roselito@novell.cpdee.ufmg.br;Depto. Engenharia Eletrónica , UFMG, Belo Horizonte, Brazil. E-mail: apbraga@cpdee.ufmg.br;Depto. Engenharia Eletrónica , UFMG, Belo Horizonte, Brazil. E-mail: brm@cpdee.ufmg.br
Venue:
Neural Processing Letters
Year:
2000

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Abstract

An adaptive neural system for positioning control of a PUMA 560 manipulator is presented". The computed torque method was implemented with a Multi-Layer Perceptron with on-line learning. The control scheme is implemented into two phases. The first one is the off-line phase in which the neural network is trained with previously known control actions. The second one is the on-line phase in which the neural network parameters are adapted while controlling the manipulator. The control system is able to respond to changes in the manipulator model and to load disturbances. As will be shown, control system performance is improved with the on-line learning strategy presented in this paper.