ACTIVE VIBRATION NOISE CONTROL APPARATUS
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United States of America Patent
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Issued Date -
May 30, 2013
app pub date -
Nov 27, 2012
filing date -
Nov 29, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An active vibration noise control apparatus cancels out vibration noise generated in the passenger compartment of a vehicle when the vehicle is traveling, by outputting canceling vibration noise. The active vibration noise control apparatus includes a frequency switcher. The frequency switcher calculates a phase angle change between a phase angle in a complex space of a filter coefficient of an adaptive notch filter and a previous phase angle calculated when the filter coefficient is updated previously, and changes a target frequency of a reference signal depending on the calculated phase angle change.
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