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    Vibration energy harvesting using a base mounted piezoelectric transducer
    1.
    发明授权
    Vibration energy harvesting using a base mounted piezoelectric transducer 有权

    公开(公告)号：US11271497B2

    公开(公告)日：2022-03-08

    申请号：US15976113

    申请日：2018-05-10

    Applicant: Texas Tech University System

    Inventor： Burak Aksak ,  Robert Koven ,  Serdar Gorumlu

    IPC: H02N2/18 ,  H02N2/00

    Abstract: An energy harvester apparatus, system and method. A cantilevered beam resonator includes a cantilever beam and a base defined by the ends of the cantilever beam. The cantilevered beam resonator further includes a piezoelectric transducer composed of one or more piezoelectric components. The piezoelectric transducer is generally mounted beneath the base of the cantilevered beam resonator. In some example embodiments, the piezoelectric component can be configured in a split electrode configuration composed of a single split arrangement or more than one split (e.g., two splits, three splits, four splits, and so on).

    Fibrillar structures to reduce viscous drag on aerodynamic and hydrodynamic wall surfaces
    2.
    发明授权
    Fibrillar structures to reduce viscous drag on aerodynamic and hydrodynamic wall surfaces 有权

    公开(公告)号：US10830261B2

    公开(公告)日：2020-11-10

    申请号：US14774767

    申请日：2014-03-12

    Applicant: Texas Tech University System ,  nanoGriptech, Inc.

    Inventor： Luciano Castillo ,  Burak Aksak ,  Metin Sitti

    IPC: F15D1/00 ,  B64C21/10 ,  B63B1/36

    Abstract: An aerodynamic or hydrodynamic wall surface has an array of fibrillar structures disposed on and extending from the wall surface, wherein each fibrillar structure comprises a stalk and a tip. The stalk has a first end and a second end, wherein the first end is attached to the wall surface, and the stalk is oriented with respect to the wall surface at a stalk angle between approximately 1 degrees and 179 degrees. The tip has a first side and a second side, wherein the first side is attached proximate to the second end of the stalk, the tip has a larger cross-sectional area than the stalk, and the second side comprises a substantially planar surface that is oriented with respect to the stalk at a tip angle between approximately 0 degrees and 90 degrees.

    FIBRILLAR STRUCTURES TO REDUCE VISCOUS DRAG ON AERODYNAMIC AND HYDRODYNAMIC WALL SURFACES
    3.
    发明申请
    FIBRILLAR STRUCTURES TO REDUCE VISCOUS DRAG ON AERODYNAMIC AND HYDRODYNAMIC WALL SURFACES 审中-公开
    减少航空动力和水动力墙面上的粘弹带的结构

    公开(公告)号：US20160017902A1

    公开(公告)日：2016-01-21

    申请号：US14774767

    申请日：2014-03-12

    Applicant: TEXAS TECH UNIVERSITY SYSTEM ,  NANOGRIPTECH, INC.

    Inventor： Luciano Castillo ,  Burak Aksak ,  Metin Sitti

    IPC: F15D1/00 ,  B63B1/36 ,  B64C21/10

    CPC classification number: F15D1/003 ,  B63B1/36 ,  B64C21/10 ,  B64C2230/26 ,  F15D1/0035 ,  Y02T50/166 ,  Y02T70/121

    Abstract: An aerodynamic or hydrodynamic wall surface has an array of fibrillar structures disposed on and extending from the wall surface, wherein each fibrillar structure comprises a stalk and a tip. The stalk has a first end and a second end, wherein the first end is attached to the wall surface, and the stalk is oriented with respect to the wall surface at a stalk angle between approximately 1 degrees and 179 degrees. The tip has a first side and a second side, wherein the first side is attached proximate to the second end of the stalk, the tip has a larger cross-sectional area than the stalk, and the second side comprises a substantially planar surface that is oriented with respect to the stalk at a tip angle between approximately 0 degrees and 90 degrees.

    Abstract translation: 空气动力学或流体动力学壁表面具有布置在壁表面上并从壁表面延伸的纤维结构阵列，其中每个纤维结构包括茎和尖端。 茎具有第一端和第二端，其中第一端附接到壁表面，并且茎以约1度至179度之间的柄角度相对于壁表面定向。 尖端具有第一侧和第二侧，其中第一侧靠近杆的第二端附接，尖端具有比杆更大的横截面面积，第二侧包括基本平坦的表面， 在约0度和90度之间的尖端角度相对于杆定向。

    METHODS AND SYSTEMS FOR MAKING FIBRILLAR ADHESION STRUCTURES
    4.
    发明申请
    METHODS AND SYSTEMS FOR MAKING FIBRILLAR ADHESION STRUCTURES 有权

    公开(公告)号：US20210370557A1

    公开(公告)日：2021-12-02

    申请号：US17335679

    申请日：2021-06-01

    Applicant: Texas Tech University System

    Inventor： Burak Aksak ,  Elliot Geikowsky

    IPC: B29C43/56 ,  F16B5/07

    Abstract: A method, system, and apparatus for a fibrillar adhesion device comprises forming a stem mold, generating an array of at least one stems using the stem mold, forming a cap mold, generating an array of at least one caps using the cap mold, adhering the array of at least one stems to the array of at least one caps, and removing the cap mold wherein the resulting system comprise an array of at least one fibrillar adhesive structures.

    SURFACE COATING FOR REDUCTION OF AERODYNAMIC NOISE AND VIBRATIONS
    5.
    发明申请
    SURFACE COATING FOR REDUCTION OF AERODYNAMIC NOISE AND VIBRATIONS 审中-公开

    公开(公告)号：US20200072258A1

    公开(公告)日：2020-03-05

    申请号：US16122794

    申请日：2018-09-05

    Applicant: TEXAS TECH UNIVERSITY SYSTEM

    Inventor： Burak Aksak ,  Luciano Castillo ,  Humberto Bocanegra Evans

    IPC: F15D1/00 ,  B64C21/10

    Abstract: A coating apparatus for the reduction of aerodynamic noise and vibrations. The coating apparatus is configured to include a group of fibrillar structures, wherein each fibrillar structure is configured with a diverging tip so that the coating reduces the size of and shifts downstream, a separation bubble, and modulates large-scale recirculating motion. Each fibrillar structure can be configured as a cylindrical micropillar. The group of fibrillar structures can be configured as a group of uniformly distributed cylindrical micropillars (e.g., one or more micropillar arrays). The surface coating is effective in reducing the separation bubble and displacing the separation bubble downstream. The coating facilitates a reduction in noise (e.g., aerodynamic noise) and vibrations due to the reduction in the size of the separation bubble.

    Surface coating for reduction of aerodynamic noise and vibrations
    6.
    发明授权
    Surface coating for reduction of aerodynamic noise and vibrations 有权

    公开(公告)号：US12012981B2

    公开(公告)日：2024-06-18

    申请号：US17067464

    申请日：2020-10-09

    Applicant: TEXAS TECH UNIVERSITY SYSTEM

    Inventor： Burak Aksak ,  Luciano Castillo ,  Humberto Bocanegra Evans

    IPC: F15D1/00 ,  B64C21/10

    CPC classification number: F15D1/0035 ,  B64C21/10 ,  B64C2230/26

    Abstract: A coating apparatus for the reduction of aerodynamic noise and vibrations. The coating apparatus is configured to include a group of fibrillar structures, wherein each fibrillar structure is configured with a diverging tip so that the coating reduces the size of and shifts downstream, a separation bubble, and modulates large-scale recirculating motion. Each fibrillar structure can be configured as a cylindrical micropillar. The group of fibrillar structures can be configured as a group of uniformly distributed cylindrical micropillars (e.g., one or more micropillar arrays). The surface coating is effective in reducing the separation bubble and displacing the separation bubble downstream. The coating facilitates a reduction in noise (e.g., aerodynamic noise) and vibrations due to the reduction in the size of the separation bubble.

    SURFACE COATING FOR REDUCTION OF AERODYNAMIC NOISE AND VIBRATIONS
    8.
    发明申请
    SURFACE COATING FOR REDUCTION OF AERODYNAMIC NOISE AND VIBRATIONS 有权

    公开(公告)号：US20210102564A1

    公开(公告)日：2021-04-08

    申请号：US17067464

    申请日：2020-10-09

    Applicant: TEXAS TECH UNIVERSITY SYSTEM

    Inventor： Burak Aksak ,  Luciano Castillo ,  Humberto Bocanegra Evans

    IPC: F15D1/00 ,  B64C21/10

    Abstract: A coating apparatus for the reduction of aerodynamic noise and vibrations. The coating apparatus is configured to include a group of fibrillar structures, wherein each fibrillar structure is configured with a diverging tip so that the coating reduces the size of and shifts downstream, a separation bubble, and modulates large-scale recirculating motion. Each fibrillar structure can be configured as a cylindrical micropillar. The group of fibrillar structures can be configured as a group of uniformly distributed cylindrical micropillars (e.g., one or more micropillar arrays). The surface coating is effective in reducing the separation bubble and displacing the separation bubble downstream. The coating facilitates a reduction in noise (e.g., aerodynamic noise) and vibrations due to the reduction in the size of the separation bubble.

    VIBRATION ENERGY HARVESTING USING A BASE MOUNTED PIEZOELECTRIC TRANSDUCER
    9.
    发明申请
    VIBRATION ENERGY HARVESTING USING A BASE MOUNTED PIEZOELECTRIC TRANSDUCER 审中-公开

    公开(公告)号：US20180367066A1

    公开(公告)日：2018-12-20

    申请号：US15976113

    申请日：2018-05-10

    Applicant: Texas Tech University System

    Inventor： Burak Aksak ,  Robert Koven ,  Serdar Gorumlu

    IPC: H02N2/18 ,  H02N2/00

    Abstract: An energy harvester apparatus, system and method. A cantilevered beam resonator includes a cantilever beam and a base defined by the ends of the cantilever beam. The cantilevered beam resonator further includes a piezoelectric transducer composed of one or more piezoelectric components. The piezoelectric transducer is generally mounted beneath the base of the cantilevered beam resonator. In some example embodiments, the piezoelectric component can be configured in a split electrode configuration composed of a single split arrangement or more than one split (e.g., two splits, three splits, four splits, and so on).

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