Weighing air flotation device for simulating weightlessness

Abstract

The invention discloses a weighing air flotation device for simulating weightlessness. The weighing air flotation device comprises an upper air flotation cushion, a sealing ring, a lower air inlet block and three strain gauges. A throttling hole is formed in the upper portion of the upper air floating cushion, and an air supply hole is formed in the lower portion of the upper air floating cushion. An air supply hole which is the same with that of the upper air floating cushion is formed over the lower air inlet block, and an air inlet connected with the air supply hole is formed under the lower air inlet block. The upper air floating cushion is connected with the lower air inlet block through a screw, and a sealing ring is installed on the connecting portion and used for preventing air leakage of the air supply hole. Three strain gauges are all installed on the lower air inlet block, two strain gauges are vertically and symmetrically arranged on the surface of the lower air inlet block, and the other strain gauge is transversely arranged on the surface of the lower air inlet block. The mass of the counter weight above the air floating cushion can be accurately obtained through the strain gauge, the height of the gravity center of the counter weight is adjusted through the height adjusting mechanism, the center height of the counter weight is equivalent to that of a hinge mechanism, the counter weight is in a weightlessness state, and the counter weight can be effectively prevented from applying force outside the excitation direction to the hinge mechanism.

Description

technical field [0001] The invention relates to the field of weighing air flotation devices for simulating weightlessness, and more specifically, to a weighing air flotation device for simulating weightlessness. Background technique [0002] Due to the limitation of the carrying space, the solar cell array is stored in the fairing in a folded form before launch, and is unfolded and locked after the spacecraft is sent into space to provide the energy requirements for the normal operation of the spacecraft. As a key mechanism in the deployment process of the solar cell array, the hinge's dynamic performance is extremely important. At present, there are two methods for simulating the weightlessness of the counterweight in the dynamic stiffness test device of the hinge mechanism of the solar battery array: the suspension method and the air flotation method. Due to the high natural frequency of the suspension system, the suspension method cannot be used for the dynamic stiffness...

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Problems solved by technology

[0003] The object of the present invention is to solve the problem that it is difficult to simulate the weightlessness in the air flotation method to simulate the weightlessness of the counterweight in the above-mentioned solar cell array hinge mechanism dynamic stiffness test device, and proposes a weighing air flotation device for simulating weightlessness, which is used for simulating Counterweight weightless environment, and ensure that the center of gravity of the counterweight is always at the same height as the hinge, so as to avoid introducing additional force to the hinge mechanism during the dynamic stiffness test, which will affect its test results

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