Additive Manufacturing Positioning for Microgravity and Vibration
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Solution Overview
Problem
Current additive manufacturing devices are unable to function in inhospitable environments such as outer space, marine vessels, and remote locations due to the lack of gravity and high vibration, which causes issues with nozzle positioning and material flow consistency.
Innovation Solution
The development of an additive manufacturing device equipped with a traverse system using linear actuators for precise positioning in microgravity and high-vibration environments, an environmental control unit, and sensors to maintain consistent material deposition, allowing for the creation of parts in extreme conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If terrestrial additive manufacturing devices are used in microgravity environments, then the device structure can be simple, but the positioning accuracy of the extrusion nozzle deteriorates
Solution Approach 1:
The patent replaces traditional mechanical positioning systems (worm gears, belt drives) with a robotic arm system that uses servo motors and sensors to achieve precise positioning in microgravity. The robotic arm with multiple degrees of freedom and feedback control mechanisms maintains nozzle positioning accuracy without relying on gravity-dependent mechanical components.
Solution Approach 2:
The patent implements feedback control through sensors that continuously monitor the position of the extrusion nozzle and build table, relay information to a controller, and enable automatic adjustment to maintain precise positioning. This closed-loop feedback system compensates for positioning drift caused by microgravity conditions.
2Device complexity
If terrestrial additive manufacturing devices are used in high-vibration environments, then the device structure can be simple, but the stability of material deposition deteriorates
Solution Approach 1:
The patent uses sensors to detect vibrations and positional deviations during material deposition, relays this information to the controller, and automatically adjusts the extrusion nozzle position and material flow rate to maintain stable deposition despite high-vibration conditions.
Solution Approach 2:
The patent employs a dynamic positioning system with robotic arms and servo motors that can rapidly adjust to vibration-induced displacements. The system continuously adapts to changing vibration conditions rather than relying on static mechanical stability, enabling consistent material deposition in high-vibration environments.
3Device complexity
If gravity-dependent positioning systems are used in microgravity, then the device structure can be simple, but the consistency of material flow deteriorates
Solution Approach 1:
The patent replaces gravity-dependent material feeding mechanisms with a robotic arm system controlled by servo motors and feedback from position sensors. This system uses controlled mechanical motion rather than gravity to maintain consistent material flow and deposition accuracy in microgravity environments.
4Adaptability or versatility
If additive manufacturing is enabled in extreme environments, then the adaptability of the device improves, but the device complexity increases
Solution Approach 1:
The patent designs a universal additive manufacturing system with a robotic arm and feedback control that can operate across multiple environments (microgravity, high-vibration, varying gravity). The core positioning and control mechanisms serve multiple functions and can adapt to different gravitational conditions without requiring environment-specific hardware modifications.
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 production of parts in various environments without the need for external gravity, reducing the dependency on terrestrial manufacturing and enabling on-demand part production, emergency repairs, and cost savings in space exploration.
Implementation Method 1
a traverse system, the traverse system comprising three linear actuators
Implementation Method 2
The extruder includes a sensor which detects the position of the part being constructed and/or the build platform assembly
Implementation Method 3
The extrusion nozzle is positioned and heated to a temperature which will melt supplied thermoplastic
Implementation Method 4
molten feedstock may float away, become poorly positioned, or otherwise escape the build volume
Data Source
AI summary
Additive manufacturing devices operable in various external force environments are disclosed. In an aspect, an additive manufacturing device operable in microgravity is disclosed. In other aspects, devices which are operable in high-vibration environments or varying external force environments are disclosed. Additive manufacturing devices herein may produce parts from metal, polymer, or other feedstocks.