A Spacecraft Attitude Control System for Suppressing Undesired Flexible Vibration

Abstract

The invention discloses a spacecraft attitude control system for suppressing unexpected flexible vibration, belonging to the technical field of spacecraft attitude control, especially the technical field of attitude control of a spacecraft having vibration suppressing requirements. The spacecraft attitude control system comprises an attitude pointing reference value generating device, an attitude control command generating device, a moment impulse generating device, an attitude measuring and estimating device, a master computer and the like; wherein the attitude pointing reference value generating device can generate four or more than four attitude pointing reference value sequences for all attitude control loops according to vibration suppressing requirements and output the attitude pointing reference value sequences according to a given rule, the attitude control command generating device can provide an attitude control command according to spacecraft attitude measuring values provided by the attitude measuring and estimating device and attitude pointing reference values provided by the attitude pointing reference value generating device in a proportional-differential form. The spacecraft attitude control system can effectively suppress the vibration on any initial condition.

Description

technical field [0001] The invention belongs to the research field of spacecraft control technology, and relates to the attitude control system design technology of a spacecraft with a structure with inherent flexible vibration motion, especially relates to strict requirements for attitude and pointing accuracy, strict requirements for dynamic characteristics of attitude and pointing, and strict structure The spacecraft attitude control system design technology required by the dynamic characteristics of body flexible motion. Background technique [0002] Since the 1970s, emerging aerospace technology has entered and rapidly expanded to many aspects of human life. Various spacecraft such as artificial earth satellites, space exploration spacecraft, space telescopes, and manned spacecraft have entered space. Performing various tasks such as communication relay, meteorological observation, earth environment observation, and space science exploration has greatly expanded human a...

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Problems solved by technology

Obviously, in actual engineering, because the dynamic parameters of the spacecraft system, the quality characteristics of the flexible structure and the flexible motion characteristics are difficult to determine accurately enough, the above design method is not convenient for practical application

It should also be pointed out that most of the studies did not consider the influence of the initial conditions of the vibration motion when the control was applied, and the paper "Minimizing residual vibrations for non-zero initial vibrations" published by Veciana et al. states:Application to an emergency stop of a crane" pointed out that the initial conditions of the vibration motion seriously affect the application effect of the input forming technology

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