| 摘要 |
<p>The present invention reduces noise signals with a comparatively low frequency from a motor (201) in a hybrid vehicle or electric vehicle, for example. A vibration detection sensor (202) is positioned at a location near the periphery of the motor (201), and in addition to detecting vibrations from the motor, detects vibrations from the motor even at locations slightly distant from the motor. Two detection signals are supplied to a least mean squares (LMS) adaptive filter (204), the phase of an output signal from the LMS adaptive filter (204) is reversed relative to a vibration detection signal for the motor (201), and the output signal is supplied to an actuator (206) positioned concentrically to the motor (201). The actuator (206) is driven so as to attenuate vibrations from the motor.</p> |
