Hitachi, Ltd.

Masakazu Kondoh

Hiroshi Matsumoto

Akira Sugano

Masahide Nomura

Tadayoshi Saito

Hisanori Miyagaki

Makoto Shimoda

Nobuyuki Yokokawa

A method for controlling a controlled system by a controller such that a controlled variable can be brought into conformity with a desired value. With respect to at least one of input/output variables for a combined controlling-controlled system, which includes in combination the controller and the controlled system, and input/output variables for the controlled system, information containing its characteristics is taken out from the combined controlling-controlled system. The information with the characteristics contained therein is inputted to a neural network which has been caused beforehand to learn a correlation between the information containing the characteristics and control parameters. From the neural network, one or more of the control parameters, said one or more control parameters corresponding to a corresponding number of inputs to the neural network, are outputted to the controller.

Process control method and system for performing control of a controlled

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Hitachi, Japan

Masakazu Kondoh