The amount of track points , including the double cusp points , which could be mostly realized by this kind of synthetic problems , was analyzed
2.
Basing on the positional characteristics of double cusps produced in the track of link points of planar four - bar linkage and combining with the synthetic equation of conventional track generator , the constraint equation set for the position of track generator that could realize two cusps ; and by means of successive elimination to obtain the most simplified forms of constraint equation set
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