Patents by Inventor Yuuji Tadano

Yuuji Tadano 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).

  • Vibration exciting apparatus and vibration testing apparatus for structure using same
    Patent number: 6721668
    Abstract: The testing performs a vibration excitation testing of a part of the structure, performs a numerical calculus of vibration response of the other parts of the structure, and calculates the vibration response of a whole of the structure by combining these two methods. Testing includes calculating a position of a point of exciting force on the basis of vibration exciting, and calculating a reaction force on the basis of a load detected and the position of the point of exciting force. Then, a displacement of a numerical model is computed by using the reaction force calculated and a known external force, and calculating a vibration exciting machine displacement command value on the basis of the displacement. A drive drives the vibration exciting on the basis of an output thereof. Vibration excitation is performed in the translational direction as well as the rotational direction.
    Type: Grant
    Filed: December 2, 1999
    Date of Patent: April 13, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yasuyuki Momoi, Toshihiko Horiuchi, Kazuhiro Umekita, Masahiko Inoue, Takao Konno, Masaharu Sugano, Yuuji Tadano
  • Multiple degree of freedom vibration exciting apparatus and system
    Patent number: 6575037
    Abstract: The testing performs a vibration excitation testing of a part of the structure, performs a numerical calculus of vibration response of the other parts of the structure, and calculates the vibration response of a whole of the structure by combining these two methods. Testing includes calculating a position of a point of exciting force on the basis of vibration exciting, and calculating a reaction force on the basis of a load detected and the position of the point of exciting force. Then, a displacement of a numerical model is computed by using the reaction force calculated and a known external force, and calculating a vibration exciting machine displacement command value on the basis of the displacement. A drive drives the vibration exciting on the basis of an output thereof. Vibration excitation is performed in the translational direction as well as the rotational direction.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: June 10, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Yasuyuki Momoi, Toshihiko Horiuchi, Kazuhiro Umekita, Masahiko Inoue, Takao Konno, Masaharu Sugano, Yuuji Tadano
  • Vibration exciting apparatus and vibration testing system for structure using it
    Publication number: 20020042667
    Abstract: Vibration excitation testing, e.g. a prototype or actual model, calculates a vibration response of a structure deforming in both of a translational direction and a rotational direction.
    Type: Application
    Filed: July 25, 2001
    Publication date: April 11, 2002
    Inventors: Yasuyuki Momoi, Toshihiko Horiuchi, Kazuhiro Umekita, Masahiko Inoue, Takao Konno, Masaharu Sugano, Yuuji Tadano