Welded Deployable Mast Structure for High-Payload Stiffness

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Solution Overview

Problem

Existing deployable structures lack sufficient strength and stiffness, especially when larger structures are needed or when supporting high-mass payloads, and they often require manual assembly in space, which increases costs and limits size.

Innovation Solution

A system for deploying a deployable mast using an elongate band that transitions from a stowed configuration to a helical, longitudinal configuration, with a welding system to join adjacent edges and a drive mechanism to guide the band, allowing for the formation of large, rigid structures like cylindrical masts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If deployable structures are made larger to support high-mass payloads, then payload capacity is improved, but structural strength and stiffness deteriorate

Engineering Contradiction:

Improvepayload capacityVSAvoidstructural strength and stiffness

Core Design Contradiction:

Quantity of substanceVSStrength

Solution Approach 1:

The structure is divided into multiple modular segments that can be deployed sequentially. Each segment maintains adequate strength-to-mass ratio while the overall structure achieves large payload capacity through cumulative effect of multiple segments working together.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs composite material construction combining multiple materials with complementary properties to achieve both high strength and low mass. This allows the structure to support high-mass payloads while maintaining structural integrity through optimized material composition.

Inventive Principle:

Principle #40Composite materials

2Device complexity

If deployable structures are manually assembled in space, then structural complexity is reduced, but manufacturing cost and assembly time increase

Engineering Contradiction:

Improveassembly complexityVSAvoidassembly time

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

Critical assembly operations including welding and fastening are performed on Earth before launch. The structure arrives in a pre-assembled or partially assembled state, eliminating the need for complex manual assembly operations in space and dramatically reducing assembly time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The deployment mechanism is designed to automatically assemble and configure the structure upon activation. Once deployed, the structure self-stabilizes and requires minimal human intervention, reducing both assembly time and operational complexity.

Inventive Principle:

Principle #25Self-service

3Strength

If welding is performed during deployment, then structural strength is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvejoint strengthVSAvoidmanufacturing complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

Traditional mechanical fastening systems are replaced with welding processes that create stronger, more integrated joints. The welding system is integrated into the deployment mechanism, allowing joints to be formed automatically during the deployment process rather than requiring separate assembly operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The welding system is merged with the deployment mechanism itself. The same actuation system that drives deployment also positions and activates welding operations, combining multiple functions into a single integrated process that reduces overall system complexity.

Inventive Principle:

Principle #5Merging (Combining)

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

Enables the deployment of strong, stiff structures that can support high-mass payloads, reducing assembly costs and enabling larger structures to be built efficiently in space.

Implementation Method 1

The welding system includes a welder configured to move relative to the axis while welding together adjacent edges of the elongate band as the elongate band transitions from the stowed configuration to the deployed configuration

Methodology Applied

Scientific EffectWelding: Welding

Data Source

PatentUS20250304285A1Systems and methods for welded deployable linear structures

Publication Date: 2025.10.02 HONEYBEE ROBOTICS LTD

AI summary

Deployable structures are described, in particular linearly-deployable structures, such as masts or booms. The masts may be stowed for transport and then deployed at their destination in space or on earth. A deployment system includes a storage reel storing a stowed elongate band. A drive mechanism biases and guides the band helically out of the storage reel to form an elongated mast. Adjacent edges of the deployed band may secure together using openings and corresponding protrusions, such as rivets. A welding system may use a rotating welder to weld adjacent edges of the band as it deploys. The band may be formed of multiple band segments attached together by connectors such as doublers. Protrusions such as rivets or other fasteners may attach the connectors to opposing sides of the band segments. A cylindrical space habitat or other macrostructure may be formed using multiple deployable masts that connect large rings.