考虑重力效应的挠性航天器姿态控制及振动抑制  

Attitude control and vibration suppress of a flexible Spacecraft Considering gravity effects

作　　者：刘福才[1] 陈鑫[1] 贾晓菁[1] 

机构地区：[1]燕山大学工业计算机控制工程河北省重点实验室,秦皇岛066004

出　　处：《高技术通讯》2015年第7期703-712,共10页Chinese High Technology Letters

基　　金：863计划(2012AA);河北省自然科学基金(F2015203362)资助项目

摘　　要：以单轴转动的挠性航天器为研究对象,建立了考虑重力效应的挠性航天器动力学模型,并对该航天器在地面调试阶段和空间应用阶段的振动特性和姿态控制精度进行了仿真研究。仿真结果表明,重力项对挠性航天器的振动特性和姿态控制精度均有影响。为了使挠性航天器在不同重力环境下均达到较高的姿态控制精度和理想的振动抑制效果,设计了自抗扰控制器(ADRC),ADRC不依赖于被控对象精确的数学模型,能够应用于不同的重力环境。仿真结果表明,该控制器能实现挠性航天器在地面调试与空间应用阶段的姿态控制及振动抑制。A dynamical model for flexible spacecrafts considering the rotating flexible spacecraft as the object of the study, and then characteristics and the attitude control accuracy in its ground gravity effect was established by choosing a uniaxial the simulation studies of the spacecraft＇s vibration alignment phase and space application phase were conducted. The simulation results show that the gravity effect has influence on both the vibration characteristics and the attitude control accuracy of the flexible spacecraft. To make flexible spacecrafts achieve higher attitude control accuracy and ideal vibration suppression, an auto disturbance rejection controller （ADRC） was designed. The controller does not depend on the precise mathematical model of the object under control, and can be applied to different gravity environments. The simulation results show that the controller is effective in vibration suppress and attitude control in the phases of ground alignment and space application of flexible spacecrafts.

关 键 词：挠性航天器 重力效应 姿态控制 振动抑制 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计]