Modified Virtual Reference Feedback Tuning and Its Application to Ultrasonic Motors
نویسندگان
چکیده
This paper proposes a virtual reference feedback tuning (VRFT) method that can compensate for a dead zone. To this end, first, by focusing on the control error, we modify the performance index such that it is minimized in VRFT. Then, we present analysis results pertaining to the optimality conditions and their related filters in the modified VRFT method. Next, a VRFT method with dead-zone compensation is proposed by combining the modified VRFT method and a dead-zone compensation technique. The proposed VRFT method with dead-zone compensation is applied to an experimental ultrasonic motor control system, and its effectiveness is verified.
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