Dynamics modeling method for obtaining antenna on-track vibration influence

Abstract

The invention discloses a dynamics modeling method for obtaining antenna on-track vibration influence. The dynamics modeling method includes the steps of taking annular antennas and all expanded arms for supporting the annular antennas in a whole-spacecraft system as substructures, establishing rigid-flexible coupling dynamic equation set for the whole-spacecraft system, calculating the modality coordinate array of the expanded arms with the annular antennas and the modality coordinate array of the annular antennas, establishing an attitude control model to simulate attitude control for the whole-spacecraft system, and calculating the annular antenna vibration response according to the attitude control simulation result. The annular antenna vibration response includes integral involved position change, of the expanded arms with the annular antennas, supposing with the self position change of the annular antennas, wherein the integral involved position change of the expanded arms with the annular antennas is solved by the modality coordinate array of the expanded arms with the annular antennas, and the self position change of the annular antennas is solved by the modality coordinate array of the annular antennas. The invention belongs to the technical field of antenna on-track vibration.

Description

technical field [0001] The invention belongs to the technical field of antenna on-orbit vibration, and in particular relates to a dynamic modeling method for obtaining the influence of antenna on-orbit vibration. Background technique [0002] With the development of my country's aerospace industry and the urgent need of national defense construction, my country is developing a series of new spacecraft such as new electronic reconnaissance satellites, communication satellites and earth observation systems with large antennas. The large flexible and deployable antennas of these spacecraft present typical complex dynamic characteristics such as large flexibility, light weight, weak damping, and nonlinearity, which bring a series of dynamic and control problems to this type of spacecraft. In the future, more and more large-scale deployable antennas will be used on spacecraft, with larger apertures and stricter indicators. Mechanical movements caused by satellite attitude and orb...

AI Technical Summary

Problems solved by technology

In the current model development process, there is still a lack of modeling, simulation, and analysis methods at the entire satellite level. For the transmission mechanism of the entire satellite’s on-orbit vibration and the impact of on-orbit vibration on the antenna beam pointing, explore the law of the entire satellite’s vibration and take corresponding measures. Suppression measures, and the evaluation of the effectiveness of vibration suppression measures, providing a complete set of analysis methods

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