Filter apparatus for actively reducing noise

Arthur P. Berkhoff (Inventor), G. Nijsse (Inventor)

    Research output: Patent

    13 Downloads (Pure)

    Abstract

    A filter apparatus for reducing noise from a primary noise source, comprising a secondary source signal connector for generating secondary noise to reduce said primary noise and a sensor connector for connecting to a sensor for measuring said primary and secondary noise as an error signal. A first control filter is arranged to receive a reference signal and calculate a control signal for the secondary source signal. A second control filter is arranged to receive a delayed reference signal and calculate an auxiliary control signal; wherein an adaptation circuit is arranged to adapt said second control filter while receiving an error signal as a sum of the auxiliary control signal and an auxiliary noise signal. The auxiliary noise signal is constructed from a difference of the delayed filtered error signal and a delayed control signal. The first control filter is updated by a copy of said updated second control filter.
    Original languageUndefined
    Patent numberUS2010150369
    Publication statusPublished - 17 Jun 2010

    Keywords

    • Adaptive control
    • Active noise and vibration control
    • IR-76004

    Cite this

    Berkhoff, A. P., & Nijsse, G. (2010). Filter apparatus for actively reducing noise. (Patent No. US2010150369).
    Berkhoff, Arthur P. (Inventor) ; Nijsse, G. (Inventor). / Filter apparatus for actively reducing noise. Patent No.: US2010150369.
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    title = "Filter apparatus for actively reducing noise",
    abstract = "A filter apparatus for reducing noise from a primary noise source, comprising a secondary source signal connector for generating secondary noise to reduce said primary noise and a sensor connector for connecting to a sensor for measuring said primary and secondary noise as an error signal. A first control filter is arranged to receive a reference signal and calculate a control signal for the secondary source signal. A second control filter is arranged to receive a delayed reference signal and calculate an auxiliary control signal; wherein an adaptation circuit is arranged to adapt said second control filter while receiving an error signal as a sum of the auxiliary control signal and an auxiliary noise signal. The auxiliary noise signal is constructed from a difference of the delayed filtered error signal and a delayed control signal. The first control filter is updated by a copy of said updated second control filter.",
    keywords = "Adaptive control, Active noise and vibration control, IR-76004",
    author = "Berkhoff, {Arthur P.} and G. Nijsse",
    year = "2010",
    month = "6",
    day = "17",
    language = "Undefined",
    type = "Patent",
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    Berkhoff, AP & Nijsse, G 2010, Filter apparatus for actively reducing noise, Patent No. US2010150369.

    Filter apparatus for actively reducing noise. / Berkhoff, Arthur P. (Inventor); Nijsse, G. (Inventor).

    Patent No.: US2010150369.

    Research output: Patent

    TY - PAT

    T1 - Filter apparatus for actively reducing noise

    AU - Berkhoff, Arthur P.

    AU - Nijsse, G.

    PY - 2010/6/17

    Y1 - 2010/6/17

    N2 - A filter apparatus for reducing noise from a primary noise source, comprising a secondary source signal connector for generating secondary noise to reduce said primary noise and a sensor connector for connecting to a sensor for measuring said primary and secondary noise as an error signal. A first control filter is arranged to receive a reference signal and calculate a control signal for the secondary source signal. A second control filter is arranged to receive a delayed reference signal and calculate an auxiliary control signal; wherein an adaptation circuit is arranged to adapt said second control filter while receiving an error signal as a sum of the auxiliary control signal and an auxiliary noise signal. The auxiliary noise signal is constructed from a difference of the delayed filtered error signal and a delayed control signal. The first control filter is updated by a copy of said updated second control filter.

    AB - A filter apparatus for reducing noise from a primary noise source, comprising a secondary source signal connector for generating secondary noise to reduce said primary noise and a sensor connector for connecting to a sensor for measuring said primary and secondary noise as an error signal. A first control filter is arranged to receive a reference signal and calculate a control signal for the secondary source signal. A second control filter is arranged to receive a delayed reference signal and calculate an auxiliary control signal; wherein an adaptation circuit is arranged to adapt said second control filter while receiving an error signal as a sum of the auxiliary control signal and an auxiliary noise signal. The auxiliary noise signal is constructed from a difference of the delayed filtered error signal and a delayed control signal. The first control filter is updated by a copy of said updated second control filter.

    KW - Adaptive control

    KW - Active noise and vibration control

    KW - IR-76004

    M3 - Patent

    M1 - US2010150369

    ER -

    Berkhoff AP, Nijsse G, inventors. Filter apparatus for actively reducing noise. US2010150369. 2010 Jun 17.