Satellite in-orbit micro-vibration simulation modeling correction method

Abstract

The invention provides a satellite in-orbit micro-vibration simulation modeling correction method, which comprises the following steps of: analyzing satellite configuration to separately model a satellite body structure and an on-satellite rotating part; according to ground test data and a finite element principle, carrying out modeling of a satellite body structure finite element model; according to attitude control and ground micro-vibration test data of other on-satellite rotating parts, establishing an on-satellite rotating part simulation model; according to a ground test state, establishing a ground simulation model, deleting ground constraints and establishing an in-orbit micro-vibration simulation model; according to the ground test data, a moving part, a control mode of the moving part and a modal value order reduction method, correcting the in-orbit micro-vibration simulation model; carrying out micro-vibration simulation analysis on the ground test state and utilizing the ground micro-vibration test data to carry out model correction; and deleting the corrected model ground constraint conditions to complete modeling. According to the invention, micro-vibration interference of a flywheel to a satellite platform can be effectively reduced; and technical support is provided for development of a high-accuracy high-resolution high-stability extra-static platform.

Description

technical field [0001] The invention relates to a satellite on-orbit micro-vibration test method, in particular to a satellite on-orbit micro-vibration simulation modeling correction method. Background technique [0002] Whether the simulation calculation of the satellite micro-vibration environment is accurate is directly related to the demonstration of the satellite micro-vibration index, the design of the vibration isolation system and the feasibility of on-orbit micro-vibration environment monitoring, and further relates to the success or failure of the development of high-precision satellites. However, from the perspective of existing technologies (such as "Modeling and Simulation of Micro-vibration of a Certain Satellite", Spacecraft Environmental Engineering, Volume 28, No. 1, 2011), in-orbit micro-vibration simulation analysis of satellites is difficult to accurately model the star model, It is difficult to accurately describe the characteristics of rotating parts an...

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Problems solved by technology

However, from the perspective of existing technologies (such as "Modeling and Simulation of Micro-vibration of a Certain Satellite", Spacecraft Environmental Engineering, Volume 28, No. 1, 2011), in-orbit micro-vibration simulation analysis of satellites is difficult to accurately model the star model, It is difficult to accurately describe the characteristics of rotating parts and it is difficult to accurately establish the micro-vibration simulation model of the whole satellite. The more accurate test data is not used as input for model establishment, and the control system of rotating parts is not modeled, which makes it difficult for the micro-vibration simulation results to be compared with the experimental results. Completely unified, mainly reflected in the difficulty of consistency in the frequency band and the magnitude of each frequency point, which makes it difficult to guide, support and demonstrate the performance of the on-orbit micro-vibration isolation system and simulate the working process of the on-orbit monitoring system

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