Low-frequency large-deflection adjustable inertia load analog piece

Abstract

The invention discloses a low-frequency large-deflection adjustable inertia load analog piece, which consists of a connecting flange, a gear, connecting brackets, a flexible load main body, a connecting sliding sleeve, a roller and a counter weight mass block, wherein the connecting flange is directly fixedly connected with an output shaft of a solar array driving structure; the connecting flangeis connected with the flexible load main body through the connecting brackets and the connecting sliding sleeve; the gear is used for synchronously adjusting an angle between the two connecting brackets, adjusting the rigidity of the inertia load analog piece and guaranteeing that a square tube beam on the end part of the flexible load main body is parallel to the end part of the solar array driving structure; the connecting sliding sleeve freely slides on the square tube beam on the end part of the flexible load main body, and the flexible load main body is symmetrically distributed along anaxis of the solar array driving structure; and the counter weight mass block is reasonably arranged on the flexible load main body, the mass distribution of the inertia load analog piece is adjusted,and the inertia of the analog piece is adjusted simultaneously. The inertia load analog piece is simple in structure and convenient to operate, easily adjusts modal frequency and is wide in adjustingrange.

Description

technical field [0001] The invention relates to a low-frequency large-deflection adjustable inertial load simulation part, which can freely adjust the modal stiffness and modal mass of the simulation part, realize the simulation and precise control of solar panels with different structural modal frequencies and different inertias, and The frequency that conforms to the actual structure can be used for the simulation test of low frequency large deflection inertia load, such as the simulation test of the solar panel structure. Background technique [0002] The current spacecraft all have solar panels with large deflection and large area, which are susceptible to vibration due to external interference and the perturbation of the parameters of the structure itself, which has a great impact on the pointing accuracy and stability of the spacecraft. The surface of the solar panel should always be kept perpendicular to the sun's rays, so that it can track the sun and obtain solar en...

AI Technical Summary

Problems solved by technology

[0005] Since the modal frequency of the solar panel is very low, and the low-order frequencies (mainly considering the first, second, third, and fourth-order frequencies) are relatively close, coupled with the existence of some errors and other factors in the process of manufacturing analog parts, a single low-frequency large It is very difficult to simulate the mode of the solar panel completely by the deflection inertia simulation part. Here, a low-frequency large deflection inertial load simulation part with adjustable stiffness and mass distribution is designed to simulate the modal frequency of the solar panel accurately. Simultaneously Solar panels with different modal characteristics

[0006] At present, there are no literature reports on low-frequency large-deflection adjustable inertial load simulation parts at home and abroad

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