Patents by Inventor Hideki Shirasaya

Hideki Shirasaya 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).

  • Flight control apparatus for helicopters
    Patent number: 6334592
    Abstract: A flight control apparatus for a helicopter is configured by: a control unit controlled by the pilot; a steering mechanism for generating an aerodynamic control force; a link mechanism for mechanically transmitting an amount of control Ma in the control unit to the steering mechanism, thereby driving the steering mechanism; an amount-of-control sensor for detecting the amount of control Ma in the control unit and for supplying a control signal Sa; a flight control law calculation unit for calculating a flight control law of the helicopter based on the control signal Sa, and for supplying a driving signal Sb for the steering mechanism; a difference calculation unit for subtracting the control signal Sa from the driving signal Sb, and for supplying a difference signal Sc; and a precision servo actuator unit for adding the amount of control Ma transmitted via the link mechanism, to an amount of difference Mc corresponding to the difference signal Sc.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: January 1, 2002
    Assignee: Advanced Technology Institute of Commuter-Helicopter, Ltd.
    Inventors: Takeshi Tomio, Hideki Shirasaya, Shigeru Tobari, Ikuo Sudo, Yoshiharu Kubo