Ground testing system for on-track micro vibration of spacecraft

Abstract

The invention discloses a ground testing system for on-track micro vibration of a spacecraft, which comprises a vibration isolating foundation, a supporting truss with a framework structure, a suspended positioning platform, a gravity suspended compensation unit, an integrated control subsystem, a micro vibration measurement subsystem and a test data processing and analyzing subsystem, wherein the vibration isolating foundation is connected with the ground, the supporting truss with the framework structure is fixedly supported on the vibration isolating foundation, the suspended positioning platform is supported on the supporting truss, the gravity suspended compensation unit is hung on the suspended positioning platform, and the integrated control subsystem is used for controlling the positioning and the fixation of the suspended positioning platform via coordination of sensors in various positions and performing the overall integrated control on the state of the system. By adopting the system, the ground simulation of the on-track micro vibration environment, the measurement of micro vibration and the data processing can be realized for the spacecraft at the system level and the component level, the technical level of testing the micro vibration of the spacecraft can be improved, and the demands for testing and verification of the on-track micro vibration environment in research on the spacecraft, particularly the high-precision satellite, can be satisfied.

Description

technical field [0001] The invention belongs to the field of micro-vibration tests of spacecraft, and in particular relates to a ground test system for on-orbit micro-vibration of spacecraft. Background technique [0002] Micro-vibration refers to the high-speed rotation of the rotating parts on the star, the stepping motion of the large-scale controllable component drive mechanism, the ignition of the thruster during the orbit change and attitude adjustment, and the disturbance induced by the alternating cold and heat of the large-scale flexible structure when it enters and exits the shadow. Make the star produce a disturbance response with small amplitude and high frequency. Most spacecraft have micro-vibration disturbance sources. Due to the small amplitude and high frequency of micro-vibration dynamics environmental effects, they will not have obvious effects on most spacecraft and are usually ignored. However, with the continuous improvement of military reconnaissance,...

AI Technical Summary

Problems solved by technology

The method of theoretical modeling and simulation evaluation is helpful to analyze the mechanism of the micro-vibration environment, but it lacks the support of test verification results, and it is difficult to meet the test verification requirements in the development of spacecraft models; while the ground micro-vibration test of some payloads alone It is also only possible to perform a simple simulation of the on-orbit micro-vibration environment of the spacecraft from a local position, and the error with the micro-vibration environment of the spacecraft system is relatively large

Images