This algorithm inherited the nearly all the properties that the c - b - splines and the catmull - clark subdivision surfaces have , such as representing the cylinders , and constructing the surface with arbitrary topologic structure meshes etc . finally , a software system is designed with visual c + + 6 . 0 and opengl in order to realize the two schemes 同时还保留了c - b样条和catmull - clark细分曲面的主要特点，例如：精确表示圆柱体，处理任意拓扑结构的控制网格等。此外，根据课题研究的需要，还在visualc + + 6 . 0环境下通过使用opengl图形库开发了一个试验用的造型系统。
This paper study a two - phase inverter - fed induction - motor drive , which can be widely used for low - power , variable speed drive system . the study has completer the design of two - phase inverter and made up of the two - phase inverter - motor system for experimental use . it is a variable frequency adjustable speed system with a open - loop control of rotational speed , which consists of singlechip controller , power drive device , inverter - fed device , a low power tow phase induction motor and safeguard circuit 本文研究了一种新型电压空间矢量控制两相逆变器?异步电动机的变频调速系统，该系统可以广泛应用于小功率、宽调速运行的场合。本项研究完成两相逆变器的设计，并组成了试验用的两相逆变器?异步电动机系统。系统是一个转速开环的变频调速系统，由单片机机控制电路、功率驱动电路、逆变器主电路、保护电路组成。
