CAJ | 학술논문

以星载大型可展开天线为对象,研究了索网绷紧前天线反射器桁架在轨展开动力学过程。对大型天线展开机构特点和展开原理进行分析,建立了反射器桁架驱动和传动机构动力学模型。为避免初始时刻天线反射器切断铰约束方程雅克比矩阵奇异,以及小展开角情况下动力学方程左端系数矩阵数值性态差问题,提出了基于几何的替代约束求解方案。对星载大型天线在轨展开动力学过程进行了数值仿真,仿真结果表明,提出的方法能够有效解决初始时刻天线反射器切断铰约束方程雅克比矩阵奇异问题。
이성재대형가전개천선위대상,연구료색망붕긴전천선반사기항가재궤전개동역학과정。대대형천선전개궤구특점화전개원리진행분석,건립료반사기항가구동화전동궤구동역학모형。위피면초시시각천선반사기절단교약속방정아극비구진기이,이급소전개각정황하동역학방정좌단계수구진수치성태차문제,제출료기우궤하적체대약속구해방안。대성재대형천선재궤전개동역학과정진행료수치방진,방진결과표명,제출적방법능구유효해결초시시각천선반사기절단교약속방정아극비구진기이문제。
The deployment of the antenna ened. The deployment characters and pri reflector truss is studied before the cable net is tight- nciples of large antenna reflector are analyzed, and the models of driving and transmission mechanisms are established. To avoid the singularity of Jacobean matrix of the cut joint constraint equations, a solving technique based on the geometry constraint is proposed, which ensures the entire simulation of its deployment procedure. The simulations of in orbit deployment of the antenna reflector are carried out. The simulation results indi cate that the proposed method is effective for solving the singularity of Jacobean matrix of the cut joint constraint equations.