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    • 4. 发明申请
    • ACTIVE NOISE CONTROL SYSTEM FOR A DEFINED VOLUME
    • 用于定义体积的主动式噪声控制系统
    • WO9910877A3
    • 1999-06-03
    • PCT/US9817121
    • 1998-08-18
    • SIKORSKY AIRCRAFT CORP
    • WELSH WILLIAM AYOERKIE CHARLES A JR
    • B64C27/04F16F15/02G10K11/178B64C27/00
    • G10K11/178G10K2210/106G10K2210/1281G10K2210/1282G10K2210/1291G10K2210/3027G10K2210/501G10K2210/511
    • An active noise control system (12) for minimizing undesirable acoustic noise in a defined volume, wherein the undesirable acoustic noise is generated by high frequency structural vibrations emanating from a vibration source structurally coupled to the defined volume at a structural interface. The active noise control system (12) comprises a sensor subsystem (26) disposed in combination with the defined volume (14) for sensing the undesirable acoustic noise in the defined volume (14), an actuator subsystem (28) disposed proximal to the structural interface (22), and a controller (30) functionally interconnecting the sensor subsystem (26) to the actuator subsystem (28), the controller (30) being operative to receive input from the sensor subsystem (26) and to transmit command signals to the actuator subsystem (28) in response thereto for generating selected high frequency counter-vibrations that are interactive with the high frequency structural vibrations to minimize the undesirable acoustic noise in the defined volume (14).
    • 一种有源噪声控制系统(12),用于最小化限定体积内的不合需要的噪声,其中不希望的噪声是由结构性耦合到结构界面处的限定体积的振动源发出的高频结构振动产生的。 主动噪声控制系统(12)包括与限定体积(14)组合布置的传感器子系统(26),用于感测限定体积(14)中的不希望的噪声;致动器子系统(28),布置在结构 接口(22)以及将传感器子系统(26)功能性地互连到致动器子系统(28)的控制器(30),控制器(30)可操作以接收来自传感器子系统(26)的输入并将命令信号 致动器子系统(28)响应于此而产生与高频结构振动相互作用的选定的高频反振动,以最小化限定体积(14)中的不希望的噪声。
    • 7. 发明专利
    • BR9814338A
    • 2000-10-03
    • BR9814338
    • 1998-12-04
    • SIKORSKY AIRCRAFT CORP
    • WELSH WILLIAM AYOERKIE CHARLES A
    • B64C27/12B64C27/00F16F7/10F16F15/00F16F15/02G10K11/178
    • An active noise control system for a helicopter for minimizing undesirable acoustic noise in a cabin defined by a cabin structure, wherein the undesirable acoustic noise is generated by high frequency structural vibrations emanating from a gearbox, and wherein the gearbox has a plurality of attachment feet structurally coupling the gearbox to the cabin structure at a plurality of structural interfaces. The active noise control system comprises a sensor subsystem disposed in combination with the cabin for sensing the undesirable acoustic noise in the cabin, an actuator subsystem disposed in combination with at least one of the plurality of attachment feet, and a controller functionally interconnecting the sensor subsystem to the actuator subsystem, the controller being operative to receive input from the sensor subsystem and to transmit command signals to the actuator subsystem in response thereto for generating at least one high frequency counter-vibration that is interactive with the high frequency vibrations to minimize the undesirable acoustic noise in the cabin. The active noise control system further includes at least one flange connected to the attachment feet proximal to the corresponding structural interface, and wherein the actuator subsystem further includes at least one structural actuator disposed in combination with the flange.