Abstract
We propose an on-line action-dependent heuristic dynamic programming approach based on recurrent neural network architecture - Echo state network (ESN) - as critic network within the frame of adaptive critic design (ACD), to be used for adaptive control. Here it is applied to the optimization of a complex nonlinear process for production of a biodegradable polymer, briefly called PHB. The on-line procedure for simultaneous critic training and process optimization is tested in the absence and presence of measurement noise. In both cases the optimization procedure succeeded in increasing the productivity and in proper training of the adaptive critic network at the same time.
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