ACTIVE VIBRATION/NOISE SUPPRESSION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an active vibration/noise suppression apparatus that can increase a tolerance for a difference between the phase of an actual transfer function and the phase of an estimated transfer function.

SOLUTION: A first addition/subtraction term of an amplitude updating expression calculated on the basis of an estimate of a transfer function and a residual signal is added to/subtracted from an amplitude filter coefficient updated in the preceding cycle, and a second addition/subtraction term of the amplitude updating expression calculated on the basis of a sinusoidal control signal is added thereto/subtracted therefrom to update the amplitude filter coefficient for the sinusoidal control signal.

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