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随着小卫星应用与需求的拓展,对星载平台承载有效载荷的要求也越来越高。针对具体的一种高收纳比要求的小卫星星载平台,介绍了一种以正三角形扭簧铰链-杆件为基本展开单元的六边形平面可展开结构。首先基于几何约束分析了其展开机理;接着推导了以杆件与参考平面的倾斜角为表征量的平面度计算公式并利用无接触摄影测量系统进行了平面度测量;然后分析了三种不同的重力消除方法对平面度测量的影响,对比了各自的优缺点。结果表明可展开结构平台稳定可行,平面度测量计算方法和重力消除方法有效可靠。
With the expansion of the application and demand of small satellites, the requirements for carrying payloads on the satellite platform are also getting higher and higher. Aiming at a kind of small satellites spaceborne platform with high storage requirements, a hexagonal plane deployable structure based on an equilateral triangle torsion spring hinge-rod unit is introduced. Firstly, the expansion mechanism is analyzed based on the geometric constraints. Then, the formula for calculating the flatness by the inclination angle of the rod and the reference plane is deduced and measured by the non-contact photogrammetry system. Then three different The impact of the gravity elimination method on the flatness measurement compares their respective advantages and disadvantages. The results show that the expandable structural platform is stable and feasible. The flatness measurement calculation method and the gravity elimination method are effective and reliable.