论文部分内容阅读
采用合适的参数化方法快速准确地描述优化前后的几何结构是形状和气动性能优化问题的前提。目前常用的曲线参数化基本方法有三种:Bezier,B-spline和NURBS曲线。参数化曲线拟合的关键是从已知形状反求控制点的信息,本文综合对比了三种不同参数化方法关于飞艇外形拟合性能的差异。结果表明,与其它两种曲线参数化方法相比,NURBS曲线使用较少的控制点,可以达到高精度、高效率的拟合。
Using the appropriate parameterization method to describe the geometric structure before and after optimization quickly and accurately is the premise of optimization of shape and aerodynamic performance. There are three basic methods of curve parameterization currently used: Bezier, B-spline and NURBS curves. The key to parametric curve fitting is to reverse the control point information from the known shape. This paper presents a comprehensive comparison of the differences between the three different parameterization methods on the fitting performance of airships. The results show that, compared with the other two parameterization methods, the NURBS curve uses fewer control points and can achieve high-precision and high-efficiency fitting.