Four-degree-of-freedom free target microgravity air flotation simulation device

Abstract

The invention relates to the field of microgravity air flotation simulation devices, particularly to a four-degree-of-freedom free target microgravity air flotation simulation device. The device includes a plane air foot, a counterweight strut, a free floating target and a magnetic suspension bearing assembly, wherein the magnetic suspension bearing assembly includes a fixed sleeve, a slide bar and a linear bearing; the magnetic suspension bearing assembly is fixedly mounted on the upper end of the planar air foot, the counterweight strut is fixed on the upper end of the magnetic suspension bearing assembly, the free floating target is fixedly mounted on the top of the counterweight strut, and motion of the free floating target on the ground in an analog microgravity environment along four degrees of freedom of three translation directions of X, Y and Z and a rotation direction of Z can be realized. The degree of freedom of motion simulation of the device is higher than a suspension spring method, but disturbing force levels of all directions are close to a planar air foot method and far lower than the suspension spring method, and the device improves the equivalence of a spatial free floating target ground microgravity simulation motion experiment.

Description

technical field [0001] The invention relates to a microgravity air flotation simulation device, in particular to a four-degree-of-freedom target microgravity air flotation simulation device. Background technique [0002] In the process of research on the active removal technology of space debris, it is necessary to effectively simulate the movement state of space debris floating freely in space on the ground. [0003] At present, there are mainly two methods for ground simulation experiments on space floating objects: [0004] 1. Hanging wire method: The hanging wire method is to suspend the target object and a counterweight of equal mass on a pulley through a very long hanging wire, which can realize translation in the three directions of X, Y, and Z, but the interference The force is very large, the interference force in the X and Y directions mainly comes from the gravity components in the X and Y directions when the long hanging wire is tilted, and the interference forc...

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Problems solved by technology

[0005] 2. Plane air foot method: Plane air foot method is to use high-pressure air to form a tiny air film between the plane air foot and the air flotation plane, so as to realize the plane air foot moving along the X and Y directions on the air flotation plane. And the frictionless movement along the Z-axis in one rotation direction has a very low level of interference force, but since the plane air foot can only move close to a high-precision horizontal surface, translation in the Z direction cannot be achieved

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