圆心曲线的计算机绘图

COMPUTER DRAFTING OF CENTER CURVE

根据运动杆的4个或5个相邻位置,准确设计4杆机构的关键是求解圆心曲线或圆点曲线。本文根据射影几何的原理,利用几何分析的方法,提出了圆心曲线上任意点坐标的参数表达式,并在计算机上实现了参数法绘制圆心曲线。

The solution of the center curve or circle point curve is the key to the accurate design of four-bar linkage mechanism in accordance with the four or five adjacent positions of a moving link. This paper puts forward the parametric formulae for calculating coordinates of any point on the center curve based on the principle of projective geometry by geometrical analytic method, and the center curve is drafted in terms of parametrical method by means of computer.