Mesh Reflector Truss Structure for Space Antennas
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Solution Overview
Problem
Existing reflector assemblies for spacecraft are either too bulky for compact transportation and deployment in space or lack the necessary durability and precision for efficient RF signal reflection.
Innovation Solution
A lightweight, collapsible reflector assembly with a frame and two interconnected bodies, where a reflective mesh is secured to one body and maintained in a curved shape by tensioning members and a support structure, allowing for compact stowage and precise RF signal reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional rigid reflector structure is used, then durability and precision are improved, but weight and volume increase making it unsuitable for space deployment
Solution Approach 1:
The reflector is divided into multiple mesh panels that can be independently folded and deployed. Each panel maintains its structural integrity while allowing the overall structure to be collapsed for launch and expanded for operation, reducing weight and volume without sacrificing durability
Solution Approach 2:
A flexible mesh material with electromagnetic reflective properties is used instead of rigid panels. The mesh can be folded into a compact configuration for transportation and deployed to form a precise reflective surface in space, achieving both weight reduction and functional performance
2Volume of moving object
If a compact reflector design is used, then transportation is improved, but deployment complexity and structural precision worsen
Solution Approach 1:
The reflector employs a dynamic deployment mechanism where the mesh structure transitions from a compact folded state to an expanded operational state. Telescopic struts and articulating joints enable controlled deployment that maintains structural precision throughout the transformation, ensuring the reflective surface achieves the required accuracy after deployment
Solution Approach 2:
The mesh panels are nested within each other in a compact configuration for transportation, similar to a telescopic structure. Upon deployment, the nested panels unfold and extend to form the full-sized reflective surface, maximizing volume efficiency during transport while maintaining structural precision in the deployed state
3Weight of moving object
If a lightweight mesh structure is used, then weight is reduced, but structural durability and resistance to environmental stresses worsen
Solution Approach 1:
The reflector uses a composite structure combining a lightweight mesh material with electromagnetic reflective properties and a supporting truss framework. The mesh provides the reflective surface with minimal weight, while the truss structure supplies the necessary structural strength and stability to withstand space environmental stresses such as thermal variations and micrometeoroid impacts
4Volume of moving object
If a deployable frame structure is used, then volume for transportation is reduced, but device complexity increases
Solution Approach 1:
The frame is segmented into multiple modular sections with standardized articulating joints and telescopic struts. This segmentation allows the frame to be collapsed into a compact configuration for transportation while simplifying the deployment process through repetitive, standardized mechanical actions at each joint section
Solution Approach 2:
The support structure integrates multiple functions into unified components: the telescopic struts simultaneously provide structural support, enable deployment motion, and maintain mesh tension. The articulating joints combine hinge mechanisms with locking features in single integrated elements, reducing the number of separate components and simplifying the overall system
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The assembly is compact for transportation, deployable in space, and maintains a precise, durable reflective surface for efficient RF signal reception and reflection, with a design that minimizes structural errors and withstands environmental stresses.
Implementation Method 1
A reflective mesh has an electromagnetically reflective surface and is secured to the curved body
Data Source
AI summary
A reflector assembly includes a frame centered about a longitudinal axis and having a first height along the axis. A curved body extends from the frame and has a second height along the longitudinal axis could be greater than the first height. A stretchable membrane has an electromagnetically reflective surface and is secured to the curved body.