Based on POC set theory and SOC unit, a 1T3R parallel stable platform is proposed. Topology structure design of low-DOF parallel stable platform is studied. Both inverse and direct kinematics and Jacobean matrix of this mechanism are analyzed. Based on the structure of the whole platform, a three-dimensional solid model is established with Pro/Engineer software, and kinematics simulation analysis is performed in ADAMS. It establishes base for the application of this kind of parallel stable platform and the follow-up research for analysis of kinematics and workspace. The results of this study on the stability of the institutional platform have an important significance.
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