活塞裙部型面的样条插值系统

为获得中凸变椭圆活塞的复杂型面，给出了求解样条曲线的一种简便算法．采用该算法拟合得到活塞的纵向型线，然后对活塞的纵向型线按轴向等距离播值，对活塞的横向截面型线按周向等角度播值，最后通过Microsoft Jet数据库引擎对生成的数据进行存储和维护．实验证明，所给算法不但计算简单，而且精度高．

System for Interpolating the Surface of Piston Skirt Using Cubic Curve

In order to get the complex surface of piston skirt with barreled profile and varying ovality, a kind of arithmetic which can simply get a cubic curve was given. In the program, first, the barreled profile of piston skirt is fitted for using the given arithmetic; second, the barreled profile is interpolated according to equal interval distance and the varying ovality is interpolated according to equal interval angle; last, the calculated data are saved through Microsoft Jet to the access database. It is proved through an example that the arithmetic is simple and precise and the system is good and can be used conveniently.