This paper also presented a calculation formula for computing the upper limit of total sum that the singular positions may probably be engenderd in arbitrary complicted multiloop planar mechanism.

• 还给出了任意复杂多环路平面机构可能产生奇异位置总数的上限计算公式。最后举例说明了一个双环复杂机构的奇异位置求解过程。