%A Bo CHEN, Luyao GUO, Baozhu LIANG, Ze JIANG, Ming LI, Yundou XU, Yongsheng ZHAO %T A two-way flat plate folding unit mechanism and motion process analysis %0 Journal Article %D 2023 %J Acta Aeronautica et Astronautica Sinica %R 10.7527/S1000-6893.2022.26720 %P 426720-426720 %V 44 %N 2 %U {https://hkxb.buaa.edu.cn/CN/abstract/article_19035.shtml} %8 2023-01-25 %X

To meet the planar deployable antenna with larger physical aperture, a new expandable two-way flat plate folding unit mechanism is proposed, and its expansion mode, degree of freedom and kinematic characteristics are analyzed. Firstly, a new configuration of two-way flat plate folding unit mechanism is proposed, and its basic composition and expansion law are briefly described. Secondly, according to the deployment motion characteristics, the mechanism is simplified to a plane mechanism, the degrees of freedom are calculated, and the number and position of drives are determined. Finally, the kinematics model is established by using the closed-loop vector method. The motion characteristics such as deployment trajectory, singular position, rod angle, angular velocity and angular acceleration are analyzed. The analytical solution of the kinematic model is compared with the simulation results to verify the correctness of the kinematic model.