Ground air flotation gravity unloading mechanism of dual-shaft orthogonal satellite antenna driving mechanism

Abstract

The invention relates to an air flotation gravity unloading mechanism, specifically to a ground air flotation gravity unloading mechanism of a dual-shaft orthogonal satellite antenna driving mechanism. The ground air flotation gravity unloading mechanism comprises a granite platform assembly, an air-foot supporting assembly, an air floatation main shaft, a load simulation part, an antenna driving mechanism mounting base, an antenna driving mechanism and a spring adjustment mechanism, wherein the air-foot supporting assembly is placed on the granite platform assembly; the load simulation part is rotationally mounted on the air-foot supporting assembly through the air floatation main shaft; the load simulation part is connected with the output end of the antenna driving mechanism; the antenna driving mechanism is fixedly connected with a bracket which is arranged on the granite platform assembly through the mounting base; and the antenna driving mechanism is supported by the spring adjustment mechanism arranged on the air-foot supporting assembly. According to the ground air flotation gravity unloading mechanism, gravity unloading of the two shafts can be completed at the same time; upward supporting force is provided through an air flotation original part, and the weight of a to-be-unloaded part is balanced; and a micro-gravity ground test environment of the antenna driving mechanism is provided.

Description

technical field [0001] The invention relates to an air flotation gravity unloading mechanism, in particular to a ground air flotation gravity unloading mechanism of a two-axis orthogonal satellite antenna drive mechanism. [0002] technical background [0003] In the existing air-floating gravity unloading mechanism, the unloading method of air foot, spherical air bearing or a combination of the two is generally used, which can perform the overall gravity unloading of the spacecraft. Gravity unloading using air feet alone (Document 1: Schubert, H.C. and J.P.How, Spaceconstruction: an experimental testbed to develop enabling technologies. Document 2: Tobe Corazzini, A.R., et al., GPS sensing for spacecraftformation flying. Document 3: Radcliffe , A.D.B.and R.J.Sedwick, Areal-time simulator for the SPHERES formation flying satellite testbed), which can provide a total of three degrees of freedom for a rotation around a vertical axis and two movements in a horizontal plane; a sp...

AI Technical Summary

Problems solved by technology

However, these unloading methods are to unload the overall gravity of the spacecraft to test the overall performance of its actuators and control systems. For drive joints with two or more axes, the interior is still greatly affected by gravity, especially for For parts with relative motion, due to the existence of gravity, there is a large friction force between the kinematic pairs, so the internal influence of gravity cannot be tested

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