Patents by Inventor Masakazu Sagisaka

Masakazu Sagisaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Transportable three-dimensional calibration wind tunnel system, verification method of flight control system using said system and flight simulator using said system
    Patent number: 5866813
    Abstract: A transportable three-dimensional calibration wind tunnel system is comprised of a small wind tunnel portion for creating a three-dimensional calibration air having a suitable wind velocity, and a two-axis rotational deformation device portion for causing said wind tunnel portion to effect a conical motion with a nozzle blow port being an apex to suitably change a flow angle. The two-axis rotational deformation device is comprised of a .beta.-angle rotational deformation device having a .beta.-angle deformation base supported to be rotated horizontally, and a .alpha.-angle rotational deformation device having a .alpha.-angle deformation base supported to be rotated vertically. A rotational axis of the .alpha.-angle deformation base, a rotational axis of the .beta.-angle deformation base and a center axis of the small wind tunnel portion are arranged so that they intersect at a point.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: February 2, 1999
    Assignee: National Aerospace Laboratory of Science &Technology Agency&National Space Develop. Agency of Japan
    Inventors: Teruomi Nakaya, Osamu Okamoto, Naoaki Kuwano, Seizo Suzuki, Shuichi Sasa, Hidehiko Nakayasu, Masakazu Sagisaka
  • Air active control aircraft using three dimensional true airspeed detection system
    Patent number: 5797105
    Abstract: An air active control aircraft having an air three-dimensional true airspeed detection system composed of an air data sensor probe in the form of a truncated pyramid-shape Pitot probe and an air flight velocity operation processor for calculating an air flight velocity vector from three-dimensional air pressure information detected by the air data sensor probe, airframe motion detection sensors for detecting an airframe motion, and an on-board control computer for generating a flight control law. The on-board control computer inputs an air flight velocity vector signal obtained from the air flight velocity vector device into a control-surface control system in parallel with airframe motion detection sensor signals, and presumes a flight motion induced by a change in air to generate the flight control law for quickly carrying out air flight stability control.
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: August 18, 1998
    Assignee: National Aerospace Laboratory of Science & Technology
    Inventors: Teruomi Nakaya, Osamu Okamoto, Naoaki Kuwano, Seizo Suzuki, Shuichi Sasa, Hidehiko Nakayasu, Masakazu Sagisaka
  • Verification method of a flight control system using a transportable wind tunnel
    Patent number: 5756891
    Abstract: A transportable three-dimensional calibration wind tunnel system consisting of a small wind tunnel portion for creating a three-dimensional airflow having a suitable wind velocity, and a two-axis rotational deformation device portion for causing the wind tunnel portion to effect a conical motion with a nozzle blow port being in close proximity to an apex to suitably change a flow angle. The two-axis rotational deformation device includes a .beta.-angle rotational deformation device having a .beta.-angle deformation base supported to be rotated horizontally, and an .alpha.-angle rotational deformation device having an .alpha.-angle deformation base supported to be rotated vertically. A rotational axis of the .alpha.-angle deformation base, a rotational axis of the .beta.-angle deformation base and a center axis of the small wind tunnel portion are arranged so that they intersect at a point.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: May 26, 1998
    Assignees: National Aerospace Laboratory of Science & Technology Agency, National Space Development Agency of Japan (NASDA)
    Inventors: Teruomi Nakaya, Osamu Okamoto, Naoaki Kuwano, Seizo Suzuki, Shuichi Sasa, Hidehiko Nakayasu, Masakazu Sagisaka
  • Transportable three-dimensional calibration wind tunnel system, verification method of flight control system and flight simulator using same
    Patent number: 5627311
    Abstract: A transportable three-dimensional calibration wind tunnel system consists of a small wind tunnel portion for creating a three-dimensional airflow having a suitable wind velocity, and a two-axis rotational deformation device portion for causing the wind tunnel portion to effect a conical motion with a nozzle blow port being in close proximity to an apex to suitably change a flow angle. The two-axis rotational deformation device includes a .beta.-angle rotational deformation device having a .beta.-angle deformation base supported to be rotated horizontally, and an .alpha.-angle rotational deformation device having an .alpha.-angle deformation base supported to be rotated vertically. A rotational axis of the .alpha.-angle deformation base, a rotational axis of the .beta.-angle deformation base and a center axis of the small wind tunnel portion are arranged so that they intersect at a point.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: May 6, 1997
    Assignees: National Aerospace Laboratory of Science & Technology Agency, National Space Development Agency of Japan (NASDA)
    Inventors: Teruomi Nakaya, Osamu Okamoto, Naoaki Kuwano, Seizo Suzuki, Shuichi Sasa, Hidehiko Nakayasu, Masakazu Sagisaka