偏馈式构架反射器展开冲击特性分析

Deployment impact analysis of the offset-fed truss reflector

偏馈式构架反射器采用单边约束与平台连接,通过弹簧储能元件驱动一次性膨胀式展开,展开时间短,冲击影响显著.由于受地面试验的局限,难以获得在轨冲击规律.以某型号偏馈式构架反射器为研究对象,基于多体动力学分析软件平台,构建了反射器多体动力学仿真模型,结合试验完成了仿真模型修正,通过仿真分析获得了在轨展开冲击特性.

As the off-fed truss reflector is connected to the platform by a single edge and deployed rapidly through being driven by the spring, the impact influence acts obviously on both the reflector and the platform. Due to limitations of the ground test, the in-orbit deployment impact characteristics of truss reflector are difficult to obtain. Then, by taking a certain reflector as the research object, a dynamic model is established with multibody dynamic software. Based on the modified model with ground deployable tests, in-orbit deployment impact characteristics are obtained by simulation analysis. Therefore, the method for multibody dynamic modeling is suitable for truss reflector dynamic research, and the result is useful for the deployable reliability optimization.