绳索断裂对二维二次太阳翼展开过程影响分析

Effect analysis of cable fracture during two-dimension two-step solar wing deployment

为识别二维二次太阳翼关键环节和预示其在轨展开故障模式,开展不同位置绳索断裂失效对太阳翼展开的影响程度分析。采用考虑绳索断裂的绳索联动轮力学模型,建立了适应于不同联动轮半径的联动轮受力模型,提出角度触发约束消除方法,解决了太阳翼第2次展开过程连续仿真问题,建立了太阳翼第2次展开动力学方程,分析了不同位置绳索断裂失效对太阳翼各板展开角度、展开构型和其他绳索张力的影响。分析表明,越靠近星体的绳索联动机构失效对太阳翼展开过程的影响越大,其中连接架上绳索联动机构失效可直接导致二维二次太阳翼在轨展开失败。

The effect of cable fracture at different locations on solar wing deployment was presented, to identify their key parts and predict their deployment failure mode in orbit. The mechanics models of closed cable loop were established with considering cable fracture effects, and the force and moment at the wheel of closed cable loop(CCL) were formulated. The method of angle trigger constraint elimination(ATCE) was presented to solve the continuous simulation problem of second deployment of solar wing. The dynamics equations of the 2 nd deployment of solar wing were derived, and the deployment angle, deployment configuration, and tension forces on other cables were analyzed at the different locations of cable fracture. The analysis indicates that the nearer cable fracture of cable closed loops from satellite body will make bigger effects to solar wing deployment;the fracture of cable closed loop at the yoke may make the solar wing fail to deploy.