The accuracy design of a parallel mechanism with three rotational degrees of freedom was studied,which might find its applications in large components pose-adjusting,satellite antenna tracking and high-speed positioning. Firstly,an error model of the mechanism was established by means of the screw theory,in which the compensable and non-compensable errors associated with parts were separated effectively. In the light of interval analysis theory,an appropriate sensitivity index was proposed and utilized for ...
SONG Yi-min,ZHAI Ya-pu,SUN Tao,LI Jin-he,ZHANG Jia-teng(Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education,Tianjin University,Tianjin 300072,China)三转动自由度并联机构具有速度快、刚度高、精度好及动、静态性能优良等优点[1],在大