An approach is presented for nonlinear system identification by combining a proven state estimation technique, Minimum Model Error (MME) estimation, with a feed-forward neural network. The MME/NN hybrid algorithm first determines from measurement data a smooth state estimate of the system as well as identifying a correction to the assumed system model. Next, the state estimates are then used as training data for the neural network’s representation of the unmodeled system dynamics. The performance is then shown to be an improvement over a stand alone black-box neural network.

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