To provide an active vibratory noise reduction device capable of achieving both reliable control stability and excellent noise canceling performance even when a change of acoustic characteristics C occurs.SOLUTION: An active vibratory noise control unit 13 of an active vibratory noise reduction device 10 includes a stability improving unit 50 that corrects an error signal e. The stability improving unit 50 includes: a correction value generation unit 51 that multiplies a reaching control sound estimation value y^ by a stabilization coefficient α to generate an error signal correction value αy^; a fourth adder 46 as an error signal correction unit that corrects the error signal e using the error signal correction value αy^ to generate a corrected error signal e'; and a stabilization coefficient updating unit 56 that sequentially updates the stabilization coefficient α based on the corrected error signal e' and the reaching control sound estimation value y^ using an adaptive algorithm. During control, the stabilization coefficient updating unit 56 can adaptively adjust the stabilization coefficient α.SELECTED DRAWING: Figure 4
【課題】音響特性Cに変化が発生しても、確実な制御安定性と良好な消音性能を両立させることが可能な能動型振動騒音低減装置を提供する。【解決手段】能動型振動騒音低減装置10の能動型振動騒音制御部13は誤差信号eを補正する安定性向上部50を備える。安定性向上部50は、到達制御音推定値y^に安定化係数αを乗じて誤差信号補正値αy^を生成する補正値生成部51と、誤差信号補正値αy^を用いて誤差信号eを補正して補正誤差信号e'を生成する誤差信号補正部としての第4加算器46と、補正誤差信号e'及び到達制御音推定値y^に基づいて、適応アルゴリズムを用いて安定化係数αを逐次更新する安定化係数更新部56とを備える。制御中に安定化係数更新部56が安定化係数αを適応的に調整することができる。【選択図】図4
ACTIVE VIBRATORY NOISE REDUCTION DEVICE
能動型振動騒音低減装置
2021-08-05
Patent
Electronic Resource
Japanese
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