关键词: 异构CAD 系统, 样条草图, 粒子群优化, Hausdorff 距离

Abstract: Existing methods of product data exchange between heterogeneous CAD systems do not
satisfy spline sketch exchange. This paper proposes a feature-based spline sketch exchange method
and divides feature-based sketch exchange into simple one and complex one. The problem of spline
sketch exchange is analyzed and the method for spline sketch fitting based on particle swarm
optimization is proposed. The Hausdorff distance is introduced to calculate the fitness of each particle.
It improves the acceleration coefficients based on curvature for avoiding the local optimum, which
makes the location distribution of interpolation points more reasonable. Test case of spline sketch
exchange between commercial CAD systems using the proposed approach is given. Experimental
results show that proposed approach can be well used to resolve the problem of sketch exchange.

Key words: heterogeneous CAD systems, spline sketch, particle swarm optimization, Hausdorff
distance