| 1. | Sort of effectively method of constructing offset surface
一种有效的等距面构造方法 |
| 2. | Research on contact problem of surfaces and contact characteristics of offset surfaces
曲面接触问题及其等距面接触特性研究 |
| 3. | Profile design of cam with cylindrical roller - followers by offset surfaces method
圆柱滚子从动件凸轮廓面的等距曲面设计方法 |
| 4. | Based on theory of spline surface offset , the first one directly finds the control polygon mesh of the offset surface from the original control mesh
第一种算法依据样条曲面等距原理，把对细分曲面的等距转化为其等距前后控制网格的对应关系。 |
| 5. | An offset surface method was proposed to calculate the discrete mandril ' s height , whose algorithm was very simple and without the convergence problem which is common to analytical algorithm
提出了采用偏移球心曲面计算顶杆高度的方法，算法实现简单，无解析算法产生的收敛问题。 |
| 6. | The virtual blending between surfaces is introduced , and offsetting surfaces of the edges and vertices of the machined solid model are generated to make the implementation of the algorithm more easily
在实体的棱边和顶点处引入虚过渡，研究实现了棱边和顶点等距面的生成。既保护了棱边与顶点，避免了过切干涉，又简化了编程。 |
| 7. | But this method can ’ t be used to generate tool - path for the kind of surfaces whose curvature varies sharply , since singularity may appear when creating the offset surface . it is computation expensive to resolve the singularity
但曲率变化大的曲面在生成等距面时发生自交,曲面的自交处理计算复杂,降低了基于等距面的刀具轨迹计算速度。 |
| 8. | Based on the principle of inclined offset surface , the calculation and generation of nc cutter location for small divided area of blade were introduced . in addition the computer simulation and the path chart of cutter center were given to prove the tool path
在每一段曲面上，基于斜等距曲面的原理，推导出叶片分段侧铣加工时刀位轨迹的生成和计算；并用计算机仿真和刀心轨迹图对刀位进行了验证。 |
| 9. | The first one is based on the offset surface of subdivision model . through mapping the original mesh node by node , the offset surface is generated . it can get the interference free tool - path directly from the offset surface without complex interference check and process
然后实现了两种精加工刀具轨迹生成方法,一种是基于等距面的截平面法,通过点对点法向映射的方法生成递归分割曲面模型法向等距面,由该等距面生成无干涉刀具轨迹。 |
| 10. | In some time - critical situation , continuous ssi is computation bottleneck of some solid modeling system . conventional approach for solving continuous ssi often uses intersection algorithm iteratively without taking the characteristic of the surface into account to simplify computation . the dissertation analyzes the intersect curve structure of continue surface , from the point of intersect curve ' s evolution , it describes the relationship between topology of offset surface intersect curve and topology transmit point ( ttp )
等距曲面和运动曲面在cad cam领域中有着重要的应用，在一些时间敏感场合例如数控加工动态仿真，等距曲面和运动曲面等连续变化曲面求交运算已成为这些系统的计算瓶颈，连续变化曲面求交问题的通常解法是采用曲面求交算法反复迭代计算交线，没有考虑连续变化曲面交线之间的相似性进行求交简化，效率上一直不能有很大的提高。 |
