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      • KCI등재

        Analysis of the PU-2UPS antenna parallel mechanism

        Guoxing Zhang,Jinwei Guo,Yulei Hou,Daxing Zeng 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.2

        In order to meet the requirements of the antenna pedestal for supporting and driving antenna to complete specific trajectory movement, the PU-2UPS parallel mechanism is proposed for antenna pedestal, where P, U and S represent the prismatic joint, universal joint and spherical joint, respectively. The screw theory is applied to analyze the mobility of the PU-2UPS antenna parallel mechanism (APM). Meanwhile, kinematic analysis of the mechanism is carried out based on the theory of twist and spatial acceleration. Based on the wrench and force balance relationship, the dynamic model of the PU-2UPS APM is established. Therefore, the actuation forces of each actuation joint are obtained. Afterward, the work-space of the PU-2UPS APM is constructed based on the boundary search method. Finally, the mathematical model of the PU-2UPS APM is established by MATLAB software, and the theoretical analysis of the PU-2UPS APM is verified by ADAMS software. The studies have been performed that the PU-2UPS APM is suitable for antenna pedestal in respect of mobility, kinematics and dynamics properties. This research results serve as a fundamental theoretical basis for design and analysis of the APM.

      • KCI등재

        Topological structure of Rubik’s cube mechanism and synthesis of the regular hexahedron Rubik’s cube mechanism

        Dabao Fan,Daxing Zeng,Ya Liu,Wenjuan Lu,Yulei Hou,Zirong Zhou,Jianwen Guo 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.4

        This study investigates the factors affecting the topology of Rubik’s cube mechanism (RCM) and presents the synthesis theory of RCM. First, the revolute axis symmetry of the RCM is described and analyzed, and the general expression needed for the revolute axis to meet the symmetry is introduced. Next, the symmetry expression of the revolute pair contact surface (RPCS) of the RCM is given. The intersection between the RPCSs is analyzed via the adjacency matrix, and the adjacency matrix characteristics are given along with the motion characteristics of RCM. After determining the RPCS intersection, its topology is studied. Finally, the synthesis theory of RCM is presented, and the synthesis process and flowchart are proposed. The regular hexahedron RCMs with different topological structures are obtained after applying the synthesis theory. Hence, the theory proposed in this study provides strong theoretical support for the synthesis of other new RCMs.

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