智能制造装备与数控加工实验室
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NURBS Curve Interpolation Algorithm Adaptive to the Machine's Kinetic Characteristics

NURBS curve interpolation algorithm for high speed NC machining, which can fit diverse machine tool's kinetic characteristics and has the function of look-ahead control, is proposed. By integrating curve geometry features and machine tool dynamic characteristics, the look-ahead control information can be obtained. The interpolating process can be divided into two phases: getting the look-ahead control information including the particular points in the curve and their suitable max feed rate, modifying the real-time interpolation feed rate all the time according to the look-ahead control information. This algorithm has advantages over others on three aspects: wide adaptation to machine tool, high profile precision, and small feed rate vibration.

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