摘要
为提高曲面加工的质量和效率,提出了一种基于冗余误差和速度平滑控制的非均匀有理B样条曲线插补算法。该算法先按照曲率大小将非均匀有理B样条曲线分段,再根据数控机床最大加速度调整分段,消除了曲率突变对加工的负面影响。同时为每个分段分别设置合适的编程进给速度,提高了加工效率。最后提出两段速度平滑控制方法,使速度过渡更为平滑。模拟试验证明了该算法的有效性。
To improve the machining quality and the efficiency of curves, a novel Non Uniform Rational B-Spline （NURBS） interpolation algorithm based on redundancy error and velocity smooth control was proposed. To elimi hate the negative influence of the sudden change of curvature, the NURBS curve was divided into small segments ac cording to their different curvatures, and then changed the segments according to the max acceleration of Computer Numerical Control （CNC） machine. Each segment was equipped with an appropriate feed speed to get higher machining efficiency. To get a more smooth velocity profile, the method of two segments velocity smooth control was proposed. The effectiveness of this algorithm was revealed by simulations.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2008年第11期2248-2252,共5页
Computer Integrated Manufacturing Systems
基金
国家发改委高技术产业化专项资助项目
国家科技部科技攻关计划资助项目(2004BA907A07)~~
关键词
非均匀有理B样条
速度平滑
插补
加工
曲率
non-uniform rational b-spline
velocity smooth
interpolation
machining
curvature
