Importance

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Abstract

A feedback control device at a certain control time, predicts a feedback quantity at the next control time on the basis of a feedback quantity fed back from a controlled object and then performs a control operation based on the predicted feedback quantity. The feedback control device includes a predictive control unit for producing such an actuating signal as to decrease a deviation between the predicted feedback quantity and a desired value. The actuating signal is used to control the controlled object. This eliminates the detrimental effects of time delays associated with the controlled object or the control device, thus ensuring good control. The use of the predictive control unit permits the controlled quantity from the controlled object to converge to the desired value monotonically and quickly. The predictive control unit may use a layered neural network having an input layer supplied with a feedback quantity and an input value corresponding to an actuating signal, and an output layer outputting a predicted feedback quantity. The deviation is back propagated from the output layer to the input layer by a relaxation algorithm in order to update the input value. The updated input value is applied to an actuating unit as an actuating signal, thereby controlling the controlled object.

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First Claim