Nongrashof机构连杆曲线的等弧长创成法

Equal Arc-length Synthesis of Coupler Curves of Nongrashof Planar Four-Link Mechanisms

根据Nongrashof机构的原动件角位移及其微分系数的变化关系 ,利用原动件的角位移在端点附近 ,其微分系数的值急剧增大的特征 ,对连杆曲线上点的坐标进行变换 ,提出了输出输入角相互切换的基准和算法 ,以较少的计算量实现了连杆曲线上输出点的等间隔分布 。

In this paper, for the purpose of classification and synthesis of nongrashof mechanisms, a procedure is presented for arranging points on the coupler curve with an equal distance, in which the input and output angles are interchanged according to whether the differential coefficient of the output angle is greater than some reference values or not. Furthermore, a pattern matching method is presented for synthesizing the coupler curve of the nongrashof mechanism.