计算力学学报2016，Vol.33Issue(4)：570-575,6.DOI:10.7511/jslx201604023
大型索网天线机电耦合动力学建模与主动变形控制
Electromechanical coupling dynamic model and active shape control of large cable-network antenna
摘要
Abstract
Due to the advantages of high stowing ability,lightweight mass and large aperture, cable-network antenna has become the first choice for many space missions.While its in-orbit perform-ance is impacted by low shape accuracy of the reflector.In this paper,the PZT actuators are added in ver-tical tension cables of the cable-network antenna,and the shape accuracy is therefore improved via active shape control.Firstly,the elements of tensioning cable-network antenna was divided into two types,in-cluding active cable elements with actuators and passive cable elements without actuators.The dynamic model of active cable element was obtained through the piezoelectric constitutive equations,geometric e-quations and Hamilton’s principle,and the electromechanical coupling dynamic model of cable-network antenna equipped with passive and active cable elements was then formulated.According to the initial shape error and the dynamic model of cable-network antenna,the control voltage profiles for actuators were then computed by a model predictive control (MPC)method.Finally,a numerical example of a 10 m-diameter cable-network antenna has been provided to verify the availability of the proposed dynamic model and the active shape control method.关键词
索网天线/机电耦合动力学模型/主动变形控制/PZT作动器Key words
cable-network antenna/electromechanical coupling dynamic model/active shape control/PZT actuator分类
航空航天引用本文复制引用
寻广彬,吴志刚,彭海军,穆瑞楠,邬树楠..大型索网天线机电耦合动力学建模与主动变形控制[J].计算力学学报,2016,33(4):570-575,6.基金项目
国家自然科学基金(11372056,11432010,11472069),中央高校基本科研业务费(DUT15ZD235)资助项目 （11372056,11432010,11472069）
