A method for obtaining the pointing of flexible components under the action of attitude-orbit control maneuvering

Abstract

A method for obtaining the pointing of flexible components under the action of attitude-orbit control maneuvers. Firstly, the structural finite element modeling of the reflector antenna is carried out, and then the rigid-flexible coupling dynamic model of the satellite is established to obtain the vibration mode vector of the reflector antenna; and then the satellite attitude control is established. The action model, and then combined with the rigid-flexible coupling dynamic model of the satellite to form a dynamic model of the satellite under closed-loop control; finally, the expression of the antenna radiation field strength in the antenna vibration modal space is established, and the on-orbit state dynamics of the entire satellite system is established. Attitude control-antenna radiation comprehensive model; the time-varying modal coordinates of the satellite antenna vibration are obtained from the simulation of the satellite’s on-orbit working excitation data, and then substituted into the modal space expression of the antenna radiation field to obtain the influence of the on-orbit working mode on the antenna radiation field strength of dynamic changes.

Description

technical field [0001] The invention relates to a method for acquiring the pointing of a flexible component under the action of an attitude-orbit control maneuver, aiming at the on-orbit working process of a large-scale expandable cable net reflector antenna, and is used in the technical field of analyzing antenna pointing changes caused by antenna vibration caused by satellite on-orbit work. Background technique [0002] With the continuous improvement of spacecraft mission requirements, the complexity of spacecraft is constantly rising, and more and more large flexible components have been implemented in orbit on spacecraft. In recent years, space-borne antennas, which are important payloads of satellites, have shown a development trend towards high precision and large-scale structures. Spaceborne large-aperture reflector antennas are typical large-scale flexible components, and my country is also developing various new spacecraft with large-scale reflector antennas. This...

AI Technical Summary

Problems solved by technology

For the beam pointing analysis of the free-floating platform and the vibration process of the antenna structure, only the beam pointing analysis under the static antenna profile cannot give the beam pointing changes of the antenna during the entire vibration process, and cannot efficiently give the worst antenna Beam pointing error, which obviously cannot meet engineering requirements

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