公开(公告)号：WO1996011465A1

公开(公告)日：1996-04-18

申请号：PCT/US1995012541

申请日：1995-10-06

Applicant: THE CENTER FOR INNOVATIVE TECHNOLOGY

Inventor： THE CENTER FOR INNOVATIVE TECHNOLOGY ,  BURDISSO, Ricardo ,  FULLER, Chris, R. ,  O'BRIEN, Walter, F. ,  THOMAS, Russell, H. ,  DUNGAN, Mary, E.

IPC: G10K11/16

CPC classification number: G10K11/178 ,  F05B2260/962 ,  G10K2210/107 ,  G10K2210/112 ,  G10K2210/121 ,  G10K2210/1281 ,  G10K2210/1291 ,  G10K2210/3032 ,  G10K2210/3042 ,  G10K2210/3045 ,  G10K2210/3046 ,  G10K2210/3226 ,  G10K2210/32271 ,  G10K2210/3229 ,  G10K2210/32291 ,  G10K2210/511

Abstract: An active noise control system using a compact sound source is effective to reduce aircraft engine duct noise. The fan noise from a turbofan engine is controlled using an adaptive filtered-x algorithm. Single, multi channel control systems are used to control the fan blade passage frequency (BPF) tone and the BPF tone and the first harmonic of the BPF tone for a plane wave excitation. The multi channel control system is used to control fan tones and a high pressure compressor BPF tone simultaneously, and any spinning mode. A compact sound source is employed to generate the control field. This compact sound source consists of an array of identical thin, cylindrically curved panels (125) with an inner radius of curvature corresponding to that of the engine inlet. These panels are flush mounted inside the inlet duct (Inlet Wall) and sealed on all edges to prevent leakage around the panel.

Abstract translation: 使用紧凑声源的主动噪声控制系统有效地减少飞机发动机管道噪声。 来自涡扇发动机的风扇噪声使用自适应滤波x算法进行控制。 单通道多通道控制系统用于控制风扇叶片通过频率（BPF）音调和BPF音调以及用于平面波激励的BPF音调的一次谐波。 多通道控制系统用于同时控制风扇音调和高压压缩机BPF音调，以及任何旋转模式。 使用紧凑的声源来产生控制场。 这种紧凑的声源由具有与发动机入口的内部曲率的内半径相同的薄的圆柱形曲面板（125）组成。 这些面板齐平地安装在入口管道（入口壁）的内部，并在所有边缘上密封，以防止面板周围的泄漏。