Sung-Chong Chung

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In order to improve the contouring accuracy of a biaxial servomechanism and the robustness against disturbance, a cross-coupled controller with a disturbance observer is studied, as well as the optimal tuning based on the integrated design methodology is proposed. Strict mathematical modeling and identification process of a servomechanism are performed(More)
INTRODUCTION Precision machinery equipped with ballscrews is widely used in the manufacturing, machine tool and semiconductor industries. Friction is very nonlinear at velocity reversals. Tracking errors due to friction degrade positioning accuracy according to operating speed. At low speed operation, the friction force is a hysteresis function of the(More)
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