Dynamics Analysis of Linear Array Deployable Structure Based on Symmetrical Scissor-Like Element

摘要

Based on the Cartesian frame, the dynamic model of the linear array deployable structures was established, the motion constraint equations were completed by the constraint conditions of the scissor-like element (SLE). The numerical calculation was carried out using multi-step Runge-Kutta method, the law of velocity and acceleration during the motion process were obtained, and the constraint default stabilization method was also utilized to avoid the divergence of the results. The results show that the velocity, acceleration, and reaction force of the scissor mechanism along y-axis presents better symmetry properties because the horizontal constant force is in x direction. Meanwhile, at the side of the mechanism withstanding the external force, the dynamic properties of each node along x direction change more obviously; however, the changing amplitude of the velocity, acceleration, and other physical quantities are very small along x-axis on the non-force side.