Universal zero-gravity unloading device

Abstract

The invention relates to a universal zero-gravity unloading device. The universal zero-gravity unloading device is used for realizing satellite-borne antenna ground-based simulation deployment and isdeveloped aiming at meeting the requirements of large antenna unloading capacity and high unloading precision requirements, rotating is adopted to replace sliding, a balance weight is adopted to pre-balance the gravitational torque of a revolution bearing beam relative to the center of a fixed revolution unit, so that it is guaranteed that the device is always in a vertical state, a gravity adaptive shaft is designed to guarantee that the axis of a servo autorotation unit is automatically vertical, and therefore the unloading stability is remarkably improved; by means of the planetary double-rotation motion self-adaptive unloading point two-dimensional motion, three-dimensional space motion is completed through cooperation of vertical motion of an unloading cable, overlapping type antennascan be realized, simulation zero-gravity deployment of overlapped antennas and other antennas meeting the track can be realized, and the universality is good; and the device is simple to install anddebug, convenient to transport and suitable for fast use in various occasions.

Description

technical field [0001] The invention relates to a universal zero-gravity unloading device, which is used to realize the ground simulation deployment of a spaceborne antenna, and belongs to the technical field of antenna mechanisms. Background technique [0002] The development of the deployable overlapping antenna, its deployment trajectory and form are as follows: image 3 , Figure 4 . Due to the complex deployment form of this type of antenna, it is necessary to accurately unload the center of mass of the reflector. Since the unloading of the center of mass requires a counterweight frame to configure the center of mass, this leads to a large weight of the deployed part of the antenna. [0003] The unloading of the existing slide rails causes the deformation of the slide rails under the action of large mass gravity, and the resistance is relatively large. In this way, when the antenna rotates under the drive of the mechanism, the motor acts on the harmonics to cause elas...

AI Technical Summary

Problems solved by technology

Due to the complex deployment form of this type of antenna, it is necessary to accurately unload the center of mass of the reflector. Since the unloading of the center of mass requires a counterweight frame to configure the center of mass, this leads to a large weight of the deployed part of the antenna.

[0003] The unloading of the existing slide rails leads to deformation of the slide rails under the action of large-mass gravity, and the resistance is relatively large

In this way, when the antenna rotates under the drive of the mechanism, the motor acts on the harmonics to cause elastic deformation and gradually increase the output torque. When the torque is greater than the resistance torque, the antenna can rotate. After the harmonic elastic torque is released, it will stop rotating and continue. Accumulate elastic potential energy, so that the antenna unfolds intermittently and rotates, which has a great impact on product safety and test accuracy, and cannot well simulate the zero-gravity deployment movement on orbit, so a universal zero-gravity unloading device is proposed

[0004] The existing "A Zero Gravity Suspension Type Deployment Test Device" patent, the movement of the unloading point during the antenna unloading process is linear sliding, and the unloading track is deformed due to large deformation during the antenna unloading process. When the unloading weight is large, the unloading resistance is greater and cannot meet the antenna deployment requirements

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