Patents by Inventor Shyunji Ono

Shyunji Ono 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).

  • Patent number: 4894599
    Abstract: In a servo controlled device such as a disk drive actuator or a robot that is driven by a DC motor and must seek from one position to another position and settle at the target position in a minimum time, a deadbeat control response can effect settling in a minimum number of servo sample times with no steady state error and no ripple between sampling instants. The device design, initial conditions entering the deadbeat controlled mode and the frequency of servo samples can be used to enable deadbeat control by limiting the control current to a value that will not saturate the motor coil or exceed the linear operating range of the controlled device.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: January 16, 1990
    Assignee: International Business Machines Corporation
    Inventors: Hjalmar H. Ottesen, Yuzo Nakagawa, Shyunji Ono