Patents by Inventor Hyun-Taek Choi

Hyun-Taek Choi 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).

  • Fuzzy controller for an actuator and the controlling method thereof
    Patent number: 5598304
    Abstract: A fuzzy controller controls a track seeking operation and a track following operation for an actuator in accordance with a position error between a present position value and a reference value. When the actuator is in track seeking operation, the actuator is accelerated or decelerated based on a velocity error value between an actual velocity value of the actuator and a target velocity value determined from a velocity profile according to the position error. In a deceleration control of the actuator, a fuzzy inference value generated based on the velocity error value and its differentiated velocity error value is used for a control of the actuator, thereby reducing an occurrence of overshooting at a target track.
    Type: Grant
    Filed: February 2, 1995
    Date of Patent: January 28, 1997
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Hyun-Taek Choi, Il hong Suh, Woo Sok Chang, Janghee Lee, Goonjin Kim