Networking Analysis of a Tetrahedral Deployable Unit Mechanism

Abstract

Facing the field of aerospace，taking the 3RR-3RRR tetrahedral deployable unit as the curved deployable antenna support mechanism，the networking method of tetrahedral unit mechanism is studied. Firstly，according to the networking principle of triangle approximating arbitrary curved surfaces，the continuous networking form and the spaced networking form are put forward and analyzed comparatively. Then，the design of curved deployable mechanism is carried out in the form of spaced networking form，and the movement process of the networking mechanism with the minimum combination unit is analyzed. Finally，the ADAMS simulation model of the minimum combination unit mechanism is established and verified. The simulation results show the correctness of the spaced networking method based on tetrahedral deployable unit. The networking method can be organized according to different sizes，forming arbitrary large curved deployable mechanisms.

Keywords

tetrahedral unit / deployable mechanism / networking / kinematic analysis