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高速高精度加工中NURBS曲線混合插補算法
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    摘要:

    研究零件復(fù)雜表面高速高精度加工的NURBS曲線參數(shù)直接插補方法,,結(jié)合FIR數(shù)字濾波器原理,,提出了一種NURBS曲線混合插補算法。在保證零件加工精度的前提下,實現(xiàn)基于S型速度曲線的加減速控制,,使運動速度準確平滑;同時,,算法中不需要插補前瞻計算,,顯著縮短了NURBS曲線插補算法運算時間。

    Abstract:

    Aiming at the demand of complex surface high speed and high accuracy of CNC machining, the NURBS curve direct interpolators were investigated. A new NURBS curve hybrid interpolation algorithm which was put forward is a combination of FIR filters, second order Taylor algorithm, and interpolator’s error control algorithm. On the basis of achieving high precision, S velocity profile was adopted to smoothly, exactly produce the velocity profile. Two cascade FIR filters were utilized to realize the acceleration and deceleration according to S velocity profile. By canceling the look-ahead algorithm in NURBS curve interpolation algorithm, NURBS curve hybrid interpolation algorithm could also greatly shorten the computing time of NURBS interpolator, increase the frequency of interpolator, and advance the machining feed-rate.

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董伯麟,王治森,韓江.高速高精度加工中NURBS曲線混合插補算法[J].農(nóng)業(yè)機械學(xué)報,2008,39(6):174-178.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(6):174-178.

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