摘要
1.引言 空间四连杆机构的运动关系是一个空间几何关系。确定四连杆相互位置时,存在着一球面与圆弧相交或两圆弧相交等情况,它们的运动与几何关系都以一些二次联立方程式表达。求解与根的判定都比较复杂,有时还要用迭代方法。本文所介绍的方法采用空间坐标变换,将空间四连杆机构的运动点转换到特定的平面内,利用平面三角形的几何关系求解。所用的方法都是典型的,简便易行,特别适用于计算机计算。
Generally, any transmission mechanism system is built by some 3-D space four-bar linkages, and they are linked together one by one as a chain. In this paper, by geometrical analysis, a general formula can be found from which the driven turn-arm angle can be derived by the given driving turn-arm angle. By using translated coordinates method the rotation metrax A is obtained, and a proof is given as well. A mechanism system for its every four-bar linkage can be solved by using this formula. The required mechanism transmission ratio is finally got. The above is the principle techniques on which the analysis in this paper is based. The method described are suitable for the computer programming technique.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1991年第8期B439-B442,共4页
Acta Aeronautica et Astronautica Sinica
关键词
四连杆机构
算法
坐标变换
algorithm, four-bar linkage, transmission mechanism.
