Patent ID: 7725237

Claim:
A control apparatus comprising: correlation parameter-calculating means for calculating a correlation parameter indicative of a correlation between a control input and a controlled variable in a controlled object based on a controlled object model defining a relationship between the control input and the controlled variable; target value-setting means for setting a target value as a target of the controlled variable; and control input-calculating means for calculating the control input with a predetermined control algorithm such that the controlled variable is caused to converge to the target value, and determining at least one of an increasing/decreasing rate and an increasing/decreasing direction of the control input according to the correlation parameter, wherein the correlation parameter-calculating means comprises: calculated control input-calculating means for calculating a calculated control input as time-series data at a predetermined repetition period, by adding a periodic signal value having a predetermined periodicity to the control input; calculated controlled variable-calculating means for calculating an calculated controlled variable corresponding to the controlled variable to be obtained when the calculated control input is used as the control input to the controlled object model, as time-series data, based on the controlled object model at the predetermined repetition period; and parameter-calculating means for calculating a plurality of multiplied values by multiplying a plurality of time-series data of the calculated controlled variable by a plurality of time-series data of the periodic signal value, respectively, and calculating the correlation parameter at the predetermined repetition period based on a sum of the multiplied values.