单层构架式可展结构平面度分析与测试

Analysis and Measurement of Flatness of a Single-Layer Deployable Truss Structure Driven by Elastic Components

对某弹性元件驱动的单层构架式可展结构的平面度评价指标进行了定义。根据可展结构基本组成单元中构件的相互几何关系,结合Monte Carlo法及多元线性回归方法,分析了构件的尺寸和加工误差对可展结构平面度的影响,利用非接触测量方法测试了可展结构模型的平面度。参考平面度分析结果,在可展结构模型I的基础上减小接头开孔圆心至侧板边缘尺寸并制作模型II。经测试,模型II的平面度得到改善且满足设计要求,验证了平面度改善方法的可行性。

According to the structural characteristics of a single-layer deployable truss structure driven by elastic components,the flatness of the structure was defined.The influence of dimension error on the flatness was analyzed by using Monte Carlo method and multiple linear regression meth-od.The flatness of deployable structure Model I and Model II was measured with a non-contact measurement method.According to the analytical results,the dimension of the joint hole to the side panel was adjusted in Model II.It was showed that the flatness of Model II was improved and could meet the design requirements.The method for adjustment of dimension to improve the flatness of the deployable structure was effective.