Nixon & Vanderhye P.C.
Fuzzy controller for an actuator and the controlling method thereof
 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. 
Daewoo Electronics Co., Ltd.
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Il hong Goonjin Janghee Woo Sok Hyun-Taek
Suh Kim Lee Chang Choi