Publications:An intelligent system for tuning magnetic field of a cathode ray tube deflection yoke

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Title An intelligent system for tuning magnetic field of a cathode ray tube deflection yoke
Author Antanas Verikas and M. Bacauskiene and A. Dosinas and V. Bartkevicius and A. Gelzinis and M. Vaitkunas and A. Lipnickas
Year 2003
PublicationType Journal Paper
Journal Knowledge-Based Systems
HostPublication
Conference
DOI http://dx.doi.org/10.1016/S0950-7051(02)00081-3
Diva url http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:237391
Abstract This short communication concerns identification of the number of magnetic correction shunts and their positions for deflection yoke tuning to correct the misconvergence of colours of a cathode ray tube. The misconvergence of colours is characterised by the distances measured between the traces of red and blue beams. The method proposed consists of two phases, namely, learning and optimisation. In the learning phase, the radial basis function neural network is trained to learn a mapping: correction shunt position→changes in misconvergence. In the optimisation phase, the trained neural network is used to predict changes in misconvergence depending on a correction shunt position. An optimisation procedure based on the predictions returned by the neural net is then executed in order to find the minimal number of correction shunts needed and their positions. During the experimental investigations, 98% of the deflection yokes analysed have been tuned successfully using the technique proposed.