Multi-flexible-plate structure vibration measurement and control device and method on planar motion air floating working table

Abstract

The invention discloses a multi-flexible-plate structure vibration measurement and control device and method on a planar motion air floating working table. The device comprises a mechanical body part, a detection drive part and a control part. A floating environment is established through an air floating cushion jet film supporting experimental platform, a flywheel and a double-guide-rail sliding table are driven by a servo motor, the experimental platform is driven to move horizontally and rotate through the acting force and the moment, vibration of cantilever slabs is stimulated, bending and torsion vibration of the cantilever slabs is detected through a detection part, and a computer obtains a signal and conducts an operation to obtain a control signal to drive a piezoelectric ceramic driver to eliminate vibration. The device simulates the general structure of an aircraft, and the air floating working table is used for simulating the vibration condition of a solar panel in space for vibration analysis and control.

Description

technical field [0001] The invention relates to the field of vibration detection and control of a cantilever plate structure, in particular to a device and method for vibration measurement and control of a multi-flexible plate structure on a planar motion air flotation workbench. Background technique [0002] In recent years, with the rapid development of aerospace industry, the structure of spacecraft tends to be large, low rigidity and flexible. In order to reduce the launch cost and improve the carrying efficiency, the solar panel structure is usually made of light and flexible materials to reduce the structural weight. In addition, with the diversification of spacecraft functions, its main structure becomes more complex and bulky, and the demand for energy becomes higher and higher, so the area of ​​solar panels becomes larger and larger. This huge and thin flexible structure has very small modal damping and low-order modal frequency of vibration. In addition, it operat...

AI Technical Summary

Problems solved by technology

This huge and thin flexible structure has very small modal damping and low-order modal frequency of vibration. In addition, it operates in a weightless environment with no external resistance in space. When self-excitation such as orbit change and sailboard expansion, it is easy to generate long-term low-frequency and large-value vibrations, which brings many problems to the spacecraft’s in-orbit operation, such as affecting the attitude stability and pointing accuracy of the spacecraft, and shortening the life of the spacecraft. , and even cause damage to the structure of the solar panels, making the spacecraft invalid, etc.

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