Patent ID: 8050779

Claim:
A method of deciding parameters of a model structure of a controlled object using parameters of a black box model of the controlled object, wherein the parameters of the model structure are decided based on the parameters of the black box model in accordance with predetermined conversion expressions, the model structure is provided with a plurality of inputs and a plurality of outputs, and comprises a plurality of model elements having one input and one output, each one output corresponding to a physical quantity of its respective model element and each one input corresponding to a parameter to control the respective physical quantity, and at least one feedback element, each at least one feedback element for feeding back a difference between outputs of a respective two model elements of the plurality of model elements to the input side of the respective model elements, transfer functions of the model elements of the model structure are first-order lag system, the predetermined conversion expressions include an expression for calculating steady gains and time constants of the transfer functions of the first-order lag system from the parameters of the black box model; and controlling physical quantities of the controlled object based on the parameters of the model structure.