| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an active type vibration noise suppression device which can expand a tolerance for a difference between phases of an actual transfer function and an estimated transfer function. <P>SOLUTION: In an active type vibration noise suppression device, when a sine-wave control signal y<SB POS="POST">(n)</SB>is expressed as a sin function, and an amplitude a<SB POS="POST">(n)</SB>and a phase ϕ<SB POS="POST">(n)</SB>in the sin function are set as adaptive filter coefficients, an amplitude update term Δa<SB POS="POST">(n+1)</SB>of an amplitude filter coefficient a<SB POS="POST">(n+1)</SB>includes a term of the formula (2), and a phase update term Δϕ<SB POS="POST">(n+1)</SB>of a phase filter coefficient ϕ<SB POS="POST">(n+1)</SB>includes a term of the formula (3), where m>1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
