公开(公告)号：ID19266A

公开(公告)日：1998-06-28

申请号：ID972150

申请日：1997-06-23

Applicant: UNITED TECHNOLOGIES CORP

Inventor： JACOBSON CLAS A ,  MCCORMICK DUANE C

IPC: G01S5/14

公开(公告)号：AU3006397A

公开(公告)日：1998-01-14

申请号：AU3006397

申请日：1997-05-14

Applicant: UNITED TECHNOLOGIES CORP

Inventor： JACOBSON CLAS A ,  MCCORMICK DUANE C

IPC: G10K11/178

Abstract: An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.

公开(公告)号：CA2361824C

公开(公告)日：2008-06-10

申请号：CA2361824

申请日：2000-02-25

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MCCORMICK DUANE C ,  GYSLING DANIEL L

IPC: B64C21/02 ,  B64C23/00 ,  F01D25/24 ,  F01D25/30 ,  F02C7/00 ,  F02C7/04 ,  F04D29/42 ,  F04D29/52 ,  F04D29/68 ,  F15D1/12

Abstract: The nozzle of an acoustic jet directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, an engine air inlet, a jet engine gas flow path or on the suction surface of an airfoil, the gas particles in the chamber of the tangential acoustic jet being replenished with approaching low momentum flux particles drawn from the gas flow in a direction normal to the surface, thereby to provide a net time- averaged flow of increased momentum flux particles to defer the onset of boundary layer separation and/or reduce the thickness of the boundary layer. The acoustic jet is driven by a gas pressure oscillation generator which may be a loudspeaker, a resonant solenoid piston , a cranked piston, or the like.

公开(公告)号：MY116912A

公开(公告)日：2004-04-30

申请号：MYPI9702678

申请日：1997-06-14

Applicant: UNITED TECHNOLOGIES CORP

Inventor： JACOBSON CLAS A ,  MCCORMICK DUANE C

IPC: H03B29/00 ,  G10K11/178

Abstract: AN ACTIVE NOISE (OR VIBRATION) CONTROL SYSTEM HAVING AN ACTUATOR 24 WHICH PROVIDES AN ACOUSTIC ANTI-NOISE SIGNAL IN RESPONSE TO AN DRIVE SIGNAL (U), AN ERROR SENSOR 16 WHICH SENSES THE ACOUSTIC ANTI-NOISE SIGNAL FROM THE ACTUATOR, SENSES DISTURBANCE NOISE (D), AND PROVIDES AN ERROR SIGNAL (E) INDICATIVE OF A COMBINATION THEREOF, AND A CONTROLLER 20, RESPONSIVE TO THE ERROR SIGNAL (E), WHICH PROVIDES THE DRIVE SIGNAL (U) TO THE ACTUATOR 24, IS PROVIDED WITH CONTROLLER COMPENSATION 78 HAVING ENERGY STATES 112 AND HAVING NON-LINEAR RESET LOGIC 130 WHICH TEMPORARILY RESETS THE ENERGY STATES 112 IN THE FILTER 78 TO ZERO WHEN THE ERROR SIGNAL CROSSES ZERO, THEREBY IMPROVING THE BANDWIDTH OF THE ACTIVE NOISE CONTROL SYSTEM.

公开(公告)号：AU5865200A

公开(公告)日：2000-10-04

申请号：AU5865200

申请日：2000-02-25

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MCCORMICK DUANE C ,  GYSLING DANIEL L

IPC: B64C21/02 ,  B64C23/00 ,  F01D25/24 ,  F01D25/30 ,  F02C7/00 ,  F02C7/04 ,  F04D29/42 ,  F04D29/52 ,  F04D29/68 ,  F15D1/12

Abstract: The nozzle of an acoustic jet directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, an engine air inlet, a jet engine gas flow path or on the suction surface of an airfoil, the gas particles in the chamber of the tangential acoustic jet being replenished with approaching low momentum flux particles drawn from the gas flow in a direction normal to the surface, thereby to provide a net time-averaged flow of increased momentum flux particles to defer the onset of boundary layer separation and/or reduce the thickness of the boundary layer. The acoustic jet is driven by a gas pressure oscillation generator which may be a loudspeaker, a resonant solenoid piston, a cranked piston, or the like.

公开(公告)号：NO986058L

公开(公告)日：1998-12-22

申请号：NO986058

申请日：1998-12-22

Applicant: UNITED TECHNOLOGIES CORP

Inventor： JACOBSON CLAS A ,  MCCORMICK DUANE C

IPC: G10K11/178

Abstract: An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.

公开(公告)号：NO986058D0

公开(公告)日：1998-12-22

申请号：NO986058

申请日：1998-12-22

Applicant: UNITED TECHNOLOGIES CORP

Inventor： JACOBSON CLAS A ,  MCCORMICK DUANE C

IPC: G10K11/178 ,  G10K

Abstract: An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.

公开(公告)号：NO986058A

公开(公告)日：1998-12-22

申请号：NO986058

申请日：1998-12-22

Applicant: UNITED TECHNOLOGIES CORP

Inventor： JACOBSON CLAS A ,  MCCORMICK DUANE C

IPC: G10K11/178

CPC classification number: G10K11/17875 ,  G10K11/17854 ,  G10K2210/129 ,  G10K2210/3026 ,  G10K2210/30391 ,  G10K2210/3217 ,  G10K2210/3229

Abstract: An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.