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若复合函数中两个基本函数在同一时刻的1阶导数同时为0,则复合函数的1～3阶导数在对应时刻为0。设组合机构的两个基本函数满足上述条件,则输出构件在对应位置作直到3阶的停歇。此数学原理实现了从动件在极限位置作直到3阶停歇的非迭代设计方法。该方法比迭代方法简单,不存在理论误差。为此,设计出了导杆在双极限位置作直到3阶停歇的一种平面六杆串联组合机构,而且研究并展示了它的传动特征。
If the first two derivatives of the two basic functions in the composite function are both 0 at the same time, the first to third derivatives of the composite function are 0 at the corresponding moment. Assuming that the two basic functions of the combination mechanism satisfy the above conditions, the output member is stopped at the corresponding position up to the third order. This mathematical principle implements a non-iterative design method for a driven member up to a third-order stop at the limit position. The method is simpler than the iterative method and there is no theoretical error. Therefore, a planar six-rod tandem combined mechanism with the guide rod in the double limit position up to the third-order stop is designed and its driving characteristics are studied and demonstrated.