Aviation system
    3.
    发明授权

    公开(公告)号:US12072364B2

    公开(公告)日:2024-08-27

    申请号:US17669833

    申请日:2022-02-11

    CPC classification number: G01R29/0878 G01R29/0807 G01R29/0842 G01R29/0892

    Abstract: According to one implementation, an aviation system 100 includes electric field sensors 112 and a ground system 114 including a computer configured to communicate with each of the electric field sensors 112. The computer is configured to: acquire electric field intensities from the electric field sensors 112 respectively, and generate a first electric field distribution on a ground surface 16 based on the electric field intensities; derive a matrix; derive a pseudo inverse matrix of the matrix; derive an electric charge distribution on the horizontal plane by multiplying the pseudo inverse matrix by the first electric field distribution on the ground surface 16; and derive a second electric field distribution on a flight path based on the electric charge distribution. The first electric field distribution on the ground surface 16 is derived by multiplying the matrix by electric charges temporarily set on a horizontal plane at a predetermined altitude.

    Observation apparatus, observation method, and program

    公开(公告)号:US11789112B2

    公开(公告)日:2023-10-17

    申请号:US17283763

    申请日:2019-02-20

    Inventor: Toshihiro Sezai

    CPC classification number: G01S7/02

    Abstract: An observation apparatus includes a signal processing unit that performs, using a square root signal of a received electric power signal from an antenna whose beam is scanned within a predetermined azimuthal angle range and a signal of an azimuthal angle of the scanned beam, a Fourier transform with respect to the azimuthal angle on the square root signal, divides a first azimuth frequency signal by a second azimuth frequency signal, the first azimuth frequency signal being obtained by performing the Fourier transform, the second azimuth frequency signal being obtained by performing a Fourier transform with respect to the azimuthal angle on a square root signal of an antenna electric power pattern, and fits the divided signal with exponential functions including real parts and imaginary parts in arguments by using Prony's method.

    METHOD OF DESIGNING AN AIRCRAFT SHAPE OF A SUPERSONIC AIRCRAFT, METHOD OF PRODUCING A SUPERSONIC AIRCRAFT, AND SUPERSONIC AIRCRAFT

    公开(公告)号:US20230130658A1

    公开(公告)日:2023-04-27

    申请号:US17905311

    申请日:2021-02-05

    Inventor: Atsushi UENO

    Abstract: A method of designing an aircraft shape of a supersonic aircraft according to an embodiment of the present invention includes: obtaining an equivalent cross-sectional area distribution of an initial shape at an off-track position of an aircraft; setting a target equivalent cross-sectional area distribution at the off-track position of the aircraft for reducing sonic booms on the basis of the obtained equivalent cross-sectional area distribution; and converting, on the basis of a required additional cross-sectional area distribution that is a difference between the equivalent cross-sectional area distribution and the target equivalent cross-sectional area distribution, a required additional cross-sectional area of a cross-section of the aircraft on an off-track Mach plane that extends through an arbitrary position in an airflow direction into a required additional cross-sectional area of a cross-section of the aircraft on an on-track Mach plane of the aircraft that is located near the off-track Mach plane and adding the required additional cross-sectional area of the cross-section of the aircraft on the on-track Mach plane.

    METHOD FOR CONTROLLING FUEL CELL DEVICE

    公开(公告)号:US20230124256A1

    公开(公告)日:2023-04-20

    申请号:US17795911

    申请日:2020-12-22

    Abstract: A method of controlling a fuel cell device includes: a step of purging a hydrogen supply unit of a fuel electrode and purging a gas supply unit of an oxidant electrode when an operation of the fuel cell device ends; a step of measuring a voltage between the fuel electrode and the oxidant electrode and determining whether the voltage is greater than a predetermined threshold; a step of continuing power generation in the fuel cell device when the voltage is greater than the predetermined threshold; and a step of depressurizing the hydrogen supply unit and the gas supply unit when the voltage is equal to or less than the predetermined threshold.

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