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    • 3. 发明授权
    • Oscillating air jets for reducing HSI noise
    • 振荡式喷气式飞机降低HSI噪音
    • US06234751B1
    • 2001-05-22
    • US09198843
    • 1998-11-24
    • Ahmed A. HassanHormoz TadghighiRam D. Janakiram
    • Ahmed A. HassanHormoz TadghighiRam D. Janakiram
    • B64C2704
    • B64C23/04B64C27/001B64C27/467B64C27/51B64C2027/725B64C2230/02B64C2230/06B64C2230/14B64C2230/18B64C2230/22B64C2230/28Y02T50/166Y02T50/34Y10S416/50
    • Porous surfaces on an aerodynamic structure driven with positive and negative pressures are used in an active control system for attenuating shock waves responsible for high-speed impulsive (HSI) noise. The control system includes an array of apertures in the outer skin of the structure providing fluid communication between the exterior flow stream and an interior volume of the structure. A movable diaphragm within the structure pushes air out of and pulls air in through the apertures under the action of a drive mechanism within the structure, thus creating oscillating air jets. The drive mechanism may be actuated by a controller based on information supplied by a sensor in the leading edge of the aerodynamic structure. The array of apertures may be spaced apart along the outer skin of the aerodynamic structure so as to span a distance of about 15% of the chord length. The oscillating airjets may be provided on multiple surfaces of the aerodynamic structure, including the upper and lower surfaces.
    • 用于正压和负压驱动的空气动力学结构上的多孔表面用于主动控制系统,用于衰减负责高速脉冲(HSI)噪声的冲击波。 控制系统包括在结构的外皮中的孔阵列,从而提供外部流动流和结构的内部体积之间的流体连通。 该结构内的可移动隔膜在结构内的驱动机构的作用下将空气推出并通过孔拉入空气,从而产生振荡空气射流。 驱动机构可以由控制器基于由空气动力结构的前缘中的传感器提供的信息来致动。 孔阵列可以沿着空气动力学结构的外表面间隔开,以便跨过弦长的约15%的距离。 可以在空气动力学结构的多个表面上设置振荡空气喷射器,包括上表面和下表面。
    • 5. 发明授权
    • Apparatus and method for aerodynamic blowing control using smart
materials
    • 使用智能材料进行气动吹风控制的装置和方法
    • US6142425A
    • 2000-11-07
    • US131464
    • 1998-08-10
    • Erian A. ArmaniosD. Stefan Dancila
    • Erian A. ArmaniosD. Stefan Dancila
    • B64C9/38B64C23/00B64C27/615B64C21/04
    • B64C9/38B64C23/00B64C27/615B64C2027/725B64C2230/04B64C2230/06B64C2230/16B64C2230/28Y02T50/166Y02T50/32Y02T50/34Y02T50/44
    • A method and apparatus for controlling the blowing of compressed air from an aerodynamic structure such as an aircraft wing or helicopter rotor blade and thus controlling the aerodynamic properties of the wing comprises a narrow slot (13) in the upper surface 915) of the structure near its trailing edge (14). Inside the wing (12) is a chamber (23) that is connected to the narrow slot (13) in the wing surface (15). The chamber (23) houses a compressed air conduit (16) for supplying and holding compressed air. A passageway (25) connects the conduit (16) to the slot (13) in the upper surface (25) of the wing (12). The lower wall (27) of the passage (25) has a slit (32) allowing a shutter (31) to move selectively into the passage (25) and obstruct the flow of compressed air through the passageway (25). The shutter (31) is attached to a smart material actuator comprising a piezoelectrical bender (29). When a control voltage is applied to the bender (29), the bender (29) will bend. The bending of the bender (29) causes the shutter (31) to move up into the passage (25) and obstruct the flow of compressed air. In this way, the flow of air out of the slot (13) in the wing surface (15) may be dynamically controlled by application of selective control voltages to the bender (29).
    • 用于控制来自诸如飞行器机翼或直升机转子叶片的空气动力学结构的压缩空气的吹送并因此控制机翼的空气动力特性的方法和装置包括在该结构的上表面915中的窄槽(1​​3) 其后缘(14)。 在机翼(12)的内部是与机翼表面(15)中的窄槽(1​​3)连接的室(23)。 腔室(23)容纳用于供应和保持压缩空气的压缩空气管道(16)。 通道(25)将导管(16)连接到机翼(12)的上表面(25)中的狭槽(13)。 通道(25)的下壁(27)具有狭缝(32),允许挡板(31)选择性地移动到通道(25)中并阻止压缩空气流过通道(25)。 快门(31)附接到包括压电弯曲机(29)的智能材料致动器。 当控制电压施加到弯曲器(29)时,弯曲器(29)将弯曲。 弯曲器(29)的弯曲使得挡板(31)向上移动到通道(25)中并阻碍压缩空气的流动。 以这种方式,可以通过向弯曲机(29)施加选择性控制电压来动态地控制从机翼表面(15)中的狭槽(13)流出的空气流。
    • 6. 发明授权
    • Oscillating air jets for helicopter rotor aerodynamic control and BVI
noise reduction
    • 用于直升机转子空气动力学控制和BVI降噪的振荡空气喷射
    • US6092990A
    • 2000-07-25
    • US869725
    • 1997-06-05
    • Ahmed A. HassanFriedrich K. StraubDavid B. Domzalski
    • Ahmed A. HassanFriedrich K. StraubDavid B. Domzalski
    • B64C23/04B64C27/467B64C27/51B64C27/04
    • B64C27/467B64C23/04B64C27/51B64C2027/725B64C2230/02B64C2230/04B64C2230/06B64C2230/14B64C2230/18B64C2230/22B64C2230/28Y02T50/166Y02T50/34Y10S416/50
    • An active control system for reducing blade-vortex-interaction (BVI) noise generated by a rotor blade. The active control system includes a pressure sensor assembly, a device for changing a lift generated by the rotor blade, and a controller for activating the device upon a detected change in air pressure by the sensor assembly. The sensor assembly is disposed in close proximity to the rotor blade, and is adapted to detect a change in air pressure on a surface of the rotor blade near a leading edge of the rotor blade. The device is adapted to be activated by the controller, to thereby change a lift of the rotor blade. The controller activates the device to change a lift of the rotor blade in order to introduce a compensating pressure onto the surface of the rotor blade. This compensating pressure attenuates the magnitude of the change of air pressure. The device for changing a lift generated by the rotor blade can include at least one aperture on the rotor blade and a diaphragm in the interior of the rotor blade. The diaphragm can be activated and moved between a first position and a second position at a frequency. Movement of the diaphragm from the first position to the second position pushes air out of the at least one aperture, and movement of the diaphragm from the second position to the first position draws air into the at least one aperture.
    • 一种用于减少由转子叶片产生的叶片 - 涡流相互作用(BVI)噪声的主动控制系统。 主动控制系统包括压力传感器组件,用于改变由转子叶片产生的升力的装置,以及用于通过传感器组件检测到的空气压力变化来启动装置的控制器。 传感器组件设置成紧邻转子叶片,并且适于检测在转子叶片的前缘附近的转子叶片的表面上的空气压力的变化。 该装置适于被控制器激活,从而改变转子叶片的升力。 控制器激活装置以改变转子叶片的升力,以便在转子叶片的表面上引入补偿压力。 这种补偿压力会降低气压变化的大小。 用于改变由转子叶片产生的升力的装置可包括转子叶片上的至少一个孔和转子叶片内部的隔膜。 隔膜可以在第一位置和第二位置之间以一个频率被激活和移动。 隔膜从第一位置移动到第二位置将空气推出至少一个孔,并且隔膜从第二位置移动到第一位置将空气吸入至少一个孔。
    • 7. 发明授权
    • Apparatus and method for aerodynamic blowing control using smart
materials
    • 使用智能材料进行气动吹风控制的装置和方法
    • US5791601A
    • 1998-08-11
    • US517951
    • 1995-08-22
    • D. Stefan DancilaErian A. Armanios
    • D. Stefan DancilaErian A. Armanios
    • B64C9/38B64C23/00B64C27/615B64C21/04
    • B64C27/615B64C23/00B64C9/38B64C2027/725B64C2230/04B64C2230/06B64C2230/16B64C2230/28Y02T50/166Y02T50/32Y02T50/34Y02T50/44
    • A method and apparatus for controlling the blowing of compressed air from an aerodynamic structure such as an aircraft wing or helicopter rotor blade and thus controlling the aerodynamic properties of the wing comprises a narrow slot (13) in the upper surface (15) of the structure near its trailing edge (14). Inside the wing (12) is a chamber (23) that is connected to the narrow slot (13) in the wing surface (15). The chamber (23) houses a compressed air conduit (16) for supplying and holding compressed air. A passageway (25) connects the conduit (16) to the slot (13) in the upper surface (15) of the wing (12). The lower wall (27) of the passage (25) has a slit (32) allowing a shutter (31) to move selectively into the passage (25) and obstruct the flow of compressed air through the passageway (25). The shutter (31) is attached to a smart material actuator comprising a piezoelectrical bender (29). When a control voltage is applied to the bender (29), the bender (29) will bend. The bending of the bender (29) causes the shutter (31) to move up into the passage (25) and obstruct the flow of compressed air. In this way, the flow of air out of the slot (13) in the wing surface (15) may be dynamically controlled by application of selective control voltages to the bender (29).
    • 用于控制来自诸如飞行器机翼或直升机转子叶片的空气动力学结构的压缩空气的吹送并因此控制机翼的空气动力特性的方法和装置包括在结构的上表面(15)中的窄槽(1​​3) 靠近其后缘(14)。 在机翼(12)的内部是与机翼表面(15)中的窄槽(1​​3)连接的室(23)。 腔室(23)容纳用于供应和保持压缩空气的压缩空气管道(16)。 通道(25)将导管(16)连接到机翼(12)的上表面(15)中的槽(13)。 通道(25)的下壁(27)具有狭缝(32),允许挡板(31)选择性地移动到通道(25)中并阻止压缩空气流过通道(25)。 快门(31)附接到包括压电弯曲机(29)的智能材料致动器。 当控制电压施加到弯曲器(29)时,弯曲器(29)将弯曲。 弯曲器(29)的弯曲使得挡板(31)向上移动到通道(25)中并阻碍压缩空气的流动。 以这种方式,可以通过向弯曲机(29)施加选择性控制电压来动态地控制从机翼表面(15)中的狭槽(13)流出的空气流。