Patents Assigned to ARUGA RESEARCH LLC
  • Double servo type magnetic disc apparatus
    Patent number: 8804266
    Abstract: According to one embodiment, a magnetic disc apparatus includes a magnetic head which reads information stored in a magnetic disc, an arm which supports the magnetic head, and a feedback controller which controls a coarse actuator to move the magnetic head above the magnetic disc by driving the arm, a fine actuator to hold a position of the magnetic head, and a feedback path which feeds back a displacement of the actuator to a target value of the coarse actuator. The feedback controller controls decoupling of a double actuator system which adds up the coarse actuator and the fine actuator.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: August 12, 2014
    Assignees: NHK Spring Co., Ltd., Aruga Research LLC
    Inventors: Masao Hanya, Keiji Aruga
  • MAGNETIC DISC APPARATUS
    Publication number: 20120200953
    Abstract: According to one embodiment, a magnetic disc apparatus includes a magnetic head which reads information stored in a magnetic disc, an arm which supports the magnetic head, and a feedback controller which controls a coarse actuator to move the magnetic head above the magnetic disc by driving the arm, a fine actuator to hold a position of the magnetic head, and a feedback path which feeds back a displacement of the actuator to a target value of the coarse actuator. The feedback controller controls decoupling of a double actuator system which adds up the coarse actuator and the fine actuator.
    Type: Application
    Filed: January 25, 2012
    Publication date: August 9, 2012
    Applicants: ARUGA RESEARCH LLC, NHK SPRING CO., LTD.
    Inventors: Masao HANYA, Keiji ARUGA