Patent ID: 7496152

Claim:
An adaptive control apparatus having an arithmetic unit for calculating the difference between a reference signal and a feedback signal, and an adaptive controller for applying adaptive control so as to diminish the difference and causing the result of adaptive control to be reflected in the reference signal, comprising: a delay unit for delaying at least one of the reference signal and feedback signal by a set delay time in such a manner that the reference signal and feedback signal will be input simultaneously to said arithmetic unit; a frequency-component detecting unit for detecting a frequency component of said reference signal; a delay-time acquisition unit for acquiring said delay time corresponding to said frequency component; a delay-time setting unit for setting said acquired delay time in said delay unit; a training signal generator for outputting a plurality of training signals of different frequencies as the reference signal; a delay-time-difference detecting unit for measuring the difference between delay times it takes for the reference signal, which is a training signal, and the feedback signal to enter said arithmetic unit; and a storage unit for storing a correspondence table indicating correspondence between a center frequency of the training signal and said measured delay-time difference, wherein said delay-time acquisition unit acquires a delay-time difference that conforms to said detected frequency component from said correspondence table and said delay-time setting unit sets this delay-time difference in said delay unit as said delay time.