公开(公告)号：WO2004078367A1

公开(公告)日：2004-09-16

申请号：PCT/FI2004/000118

申请日：2004-03-03

Applicant: ADAPTIVE MATERIALS TECHNOLOGY OY ,  ULLAKKO, Kari ,  TELLINEN, Juhani

Inventor： ULLAKKO, Kari ,  TELLINEN, Juhani

IPC: B06B1/08

CPC classification number: F16F15/005 ,  B06B1/045 ,  B06B2201/58 ,  B06B2201/70 ,  G10K11/16 ,  G10K11/178 ,  G10K2210/10 ,  G10K2210/116 ,  G10K2210/121 ,  G10K2210/321 ,  G10K2210/32121 ,  G10K2210/3223 ,  G10K2210/3224 ,  G10K2210/3228 ,  G10K2210/3229 ,  G10K2210/507 ,  G10K2210/509 ,  H01L41/12

Abstract: The invention relates to devices that produce displacements and/or forces (defined as actuators), when a magnetic field source(s) is (are) placed in such a way that the resulting magnetic field is of suitable strength and orientation in relation to the actuating element made from a Magneto-Mechanical Adaptive (MMA) material, so as to produce the desired displacement of the MMA element; or to devices that dampen mechanical vibrations by absorbing the vibration energy into an MMA element and/or by converting the vibration energy into electric power in the device and/or senses displacement, velocity or acceleration. The electric energy can be dissipated to heat or led out from the device. In the latter case, the device works as a power generator. The principle of using the devices as sensors is also described. The MMA material here is defined as a material whose dimensions change when a magnetic field or stress is applied to it, based on twin boundary or austenite-martensite phase boundary motion or magnetostriction.

Abstract translation: 本发明涉及产生位移和/或力（定义为致动器）的装置，当磁场源被放置成使得所得到的磁场相对于 由MMA材料制成的致动元件，以便产生MMA元件的期望位移; 或通过将振动能量吸收到MMA元件中和/或通过将振动能量转换成装置中的电力和/或感测位移，速度或加速度来衰减机械振动的装置。 电能可以消散以加热或从设备引出。 在后一种情况下，该装置用作发电机。 还描述了将装置用作传感器的原理。 这里的MMA材料被定义为基于双边界或奥氏体 - 马氏体相边界运动或磁致伸缩而施加磁场或应力的尺寸变化的材料。

公开(公告)号：WO1996012269A1

公开(公告)日：1996-04-25

申请号：PCT/US1995012725

申请日：1995-10-12

Applicant: THE BOEING COMPANY

Inventor： THE BOEING COMPANY ,  OLSEN, Ronald, F. ,  ORZECHOWSKI, Jeffery, M.

IPC: G10K11/178

CPC classification number: G10K11/178 ,  F05B2260/962 ,  G10K2210/109 ,  G10K2210/112 ,  G10K2210/121 ,  G10K2210/1281 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3045 ,  G10K2210/3046 ,  G10K2210/32121 ,  G10K2210/3229

Abstract: A jet engine fan noise reduction system. The noise reduction system includes active noise control to suppress fan (15) tone noise of an airplane flyover noise signature. The active noise control includes microphones (1, 11) with acoustic transducers upstream and downstream of the engine fan (15) and fan exit guide vane (16) stage to sense control system errors. Control signals are derived from the fan angular speed or blade passing frequency and the error signal sensed by the acoustic transducers. The control output signals actuate (modulate) air control valves (45) on each side of the fan stage to direct conditioned (pressure and temperature regulated) high pressure primary air flow, thereby producing acoustic cancelling of fan tone noise.

Abstract translation: 喷气发动机风扇降噪系统。 噪声降低系统包括主动噪声控制以抑制飞机飞越噪声特征的风扇（15）音噪声。 主动噪声控制包括具有在发动机风扇（15）上游和下游的声学换能器和风扇出口导叶（16）级的麦克风（1,11），用于感测控制系统误差。 控制信号来自风扇角速度或叶片通过频率以及由声换能器感测到的误差信号。 控制输出信号驱动（调制）风扇台两侧的空气控制阀（45），以引导调节（压力和温度调节）高压一次空气流，从而产生声音消除风扇噪音。

公开(公告)号：WO1996023295A1

公开(公告)日：1996-08-01

申请号：PCT/FR1996000092

申请日：1996-01-19

Applicant: BERTIN & CIE. ,  GRAS, François, Noël ,  GERARD, Philippe, Grégoire

Inventor： BERTIN & CIE.

IPC: G10K11/178

CPC classification number: F01N1/065 ,  G10K7/00 ,  G10K11/178 ,  G10K2210/1053 ,  G10K2210/112 ,  G10K2210/321 ,  G10K2210/32121 ,  G10K2210/3217 ,  G10K2210/512

Abstract: A device including an acoustic wave generator (10) and means (2 or 2', 4, 11) for controlling the generator (10) to transmit acoustic waves in phase opposition to the acoustic waves of the noise. Said generator (10) is an acoustic amplifier in which a pressurised fluid flow interacts with a movable obstacle (15) controlled by said means (2 or 2', 4, 11). Said generator (10) is advantageously a pneumatic loudspeaker. The device is useful for controlling noise in a harsh and/or polluting environment.

Abstract translation: 一种包括声波发生器（10）的装置和用于控制发生器（10）以与声音的声波相反地传播声波的装置（2或2'，4,11）。 所述发生器（10）是声学放大器，其中加压流体流与由所述装置（2或2'，4,11）控制的可移动障碍物（15）相互作用。 所述发电机（10）有利地是气动扬声器。 该设备可用于在恶劣和/或污染环境中控制噪音。

公开(公告)号：WO1994008540A1

公开(公告)日：1994-04-28

申请号：PCT/US1993009739

申请日：1993-10-12

Applicant: WAGENFELD, Robert ,  BOZICH, Daniel

IPC: A61F11/06

CPC classification number: G10K11/178 ,  F05B2260/962 ,  G01N2291/02491 ,  G10K2210/107 ,  G10K2210/121 ,  G10K2210/1281 ,  G10K2210/30232 ,  G10K2210/3038 ,  G10K2210/3046 ,  G10K2210/3051 ,  G10K2210/3212 ,  G10K2210/32121 ,  G10K2210/3216

Abstract: A method and system for reducing the acoustic levels of internal and external sound fields (23 and 24) generated by gas turbine engines (2) has several actuators to generate sound (50, 84, and 115), several sensors to measure the acoustic levels (49 and 69), and one or more controllers (113). The controllers are adaptive self-learning neural networks (112) that control the actuators to generate sound in order to effect the reduction of the internal and external sound field as measured by the sensors.

Abstract translation: 用于降低由燃气涡轮发动机（2）产生的内部和外部声场（23和24）的声级的方法和系统具有若干致动器以产生声音（50,84和115），若干传感器用于测量声级 （49和69）和一个或多个控制器（113）。 控制器是自适应自学习神经网络（112），其控制致动器产生声音，以便实现由传感器测量的内部和外部声场的减少。