Papers by Author: Yan Bin Duan

Abstract: The existence of coupling makes the parallel mechanism possess some special advantages over the serial mechanism, while it is just the coupling that brings about the parallel mechanism some difficulties in kinematics and dynamic analysis, the development of control system, and the trajectory planning. Therefore the research on the decoupled parallel mechanism becomes one of the hot of the mechanism fields. While whether the parallel mechanism can realize decouple is the premise for synthesis and analysis of the parallel mechanism. Based on screw theory, the existence of the three degrees of freedom (3-DoF) rotational fully-decoupled parallel mechanism is distinguished. Then taking the 6-PUS/UPU parallel mechanism as example, the rotation angles of the moving platform are measured, which is verified the impossibility of the 3-DoF rotation decoupling. The contents of this paper should possess theoretical significance for the innovative configuration synthesis and structure design of rotational decoupled parallel mechanism.

Abstract: For the real-time pose adjustment of the sub-reflector of antenna to ensure its best condition, Stewart platform-based mechanism is adopted. This paper presents the configuration optimization of the adjusting parallel mechanism taking the minimum force acted on each limb as the target, and the basic structural parameters of the mechanism are obtained. Considering the weight of the moving platform, the external load, and the influence of the snow and the wind, the maximum force acted on the limbs of the mechanism in the required workspace is calculated, which established the foundation for the structural design of the mechanism. The contents of this paper possess theoretical significance and engineering value for the development of the adjusting mechanism for the sub-reflector of antenna.