摘要
在给定具体型值点的条件下 ,通过平方根法计算得NURBS曲线的节点矢量 ;采用deBoor -Cox递推公式分别计算得一次、二次和三次基函数 ;构造边界条件反求得控制顶点。构造出三次NURBS曲线的参数方程。采用等距离偏移计算得曲线轮廓加工刀位轨迹 ,为NC代码的生成提供数据。
Knot vector is calculated by square root method on condition that data points are specified; and linear, conic and cubic basic functions are deduced by de Boor-Cox formula. Boundary conditions are constructed to get the control points and the equation of 3-order NURBS curved profile is acquired. The NC cutting location data of NURBS are obtained by its offset curve, which is the premise of NC code.
出处
《组合机床与自动化加工技术》
北大核心
2003年第6期19-21,共3页
Modular Machine Tool & Automatic Manufacturing Technique
