Supported by National Natural Science Foundation of China(Grant Nos.51375059,61105103);National Hi-tech Research and Development Program of China(863 Program,Grant No.2011AA040203);Beijing Municipal Natural Science Foundation of China(Grant No.4132032)
For a spherical four-bar linkage,the maximum number of the spherical RR dyad(R:revolute joint)of five-orientation motion generation can be at most 6.However,complete real solution of this problem has seldom been st...