Patents by Inventor Motohiro Kawafuku

Motohiro Kawafuku 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).

  • Servo control system for movable body, and laser drilling machine
    Patent number: 7768225
    Abstract: A difference between each position command data outputted in a form of a step signal from a high-level controller and its corresponding detected position data of a movable body is integrated by an integral compensator to position the movable body. Assuming, for example, that the movable body is a steerable mirror, digital filters are arranged to compensate the value of an initial state of an angular displacement and the value of an initial state of an angular velocity, respectively, and respective impulse responses of the digital filters as additional input elements are added to an output terminal of the integral compensator. For higher effectiveness, internal state variables of the digital filters can desirably be cleared to zero whenever an angle (position) command data is received.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: August 3, 2010
    Assignee: Hitachi Via Mechanics Ltd.
    Inventors: Souichi Toyama, Yaichi Okubo, Hiromu Hirai, Makoto Iwasaki, Motohiro Kawafuku, Noriaki Hirose
  • Servo control system for movable body, and laser drilling machine
    Publication number: 20050187650
    Abstract: A difference between each position command data outputted in a form of a step signal from a high-level controller and its corresponding detected position data of a movable body is integrated by an integral compensator to position the movable body. Assuming, for example, that the movable body is a steerable mirror, digital filters are arranged to compensate the value of an initial state of an angular displacement and the value of an initial state of an angular velocity, respectively, and respective impulse responses of the digital filters as additional input elements are added to an output terminal of the integral compensator. For higher effectiveness, internal state variables of the digital filters can desirably be cleared to zero whenever an angle (position) command data is received.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 25, 2005
    Applicant: Hitachi Via Mechanics Ltd.
    Inventors: Souichi Toyama, Yaichi Okubo, Hiromu Hirai, Makoto Iwasaki, Motohiro Kawafuku, Noriaki Hirose