Adaptive Laser Processing of Lunar Regolith for Vacuum Structures
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Solution Overview
Problem
Conventional construction techniques are ill-suited for forming 3D structures using non-terrestrial materials, such as lunar regolith, due to limitations in gravity, atmospheric pressures, and temperature variations, and existing methods like selective laser sintering are restricted to terrestrial use.
Innovation Solution
A system using an integrated end effector with a scoop, filter, and laser power unit to select and process indigenous particulate, applying adaptive levels of energy in a vacuum to form structures, controlling temperature and crystallization to create ceramic-glass sub-structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional binder-based mortars are used with non-terrestrial materials, then material availability is improved, but structural quality and reliability deteriorate
Solution Approach 1:
The patent changes the fundamental processing parameters from binder-based chemical bonding to laser-induced thermal melting and crystallization. By controlling temperature profiles, heating rates, and cooling rates through laser parameters (power, speed, pulse duration), the system transforms non-terrestrial particulate into reliable ceramic-glass structures with controlled microstructure, resolving the unreliability of conventional binder approaches.
Solution Approach 2:
The patent replaces mechanical mixing and chemical binder applications with laser-based energy delivery. The laser system substitutes for conventional construction equipment by directly melting and fusing particles through electromagnetic energy, eliminating the need for binders and mechanical assembly processes that fail with non-terrestrial materials.
2Ease of manufacture
If terrestrial selective laser sintering techniques are applied to non-terrestrial materials, then manufacturing capability is improved, but process reliability deteriorates due to environmental differences
Solution Approach 1:
The patent implements dynamic adaptability through real-time monitoring and feedback control of laser parameters. The system continuously adjusts power, speed, and pulse characteristics based on actual process conditions (particle composition, layer density, thermal accumulation) to maintain optimal melting and crystallization, ensuring reliable operation across varying lunar environmental conditions.
Solution Approach 2:
The patent creates a controlled processing environment by operating in vacuum conditions and using inert gas shielding where applicable. This protects the molten and crystallizing material from unwanted chemical reactions with atmospheric gases, ensuring process reliability and material purity in the lunar environment.
3Manufacturing precision
If adaptive laser energy levels are applied to indigenous particulate, then structural quality is improved, but device complexity increases
Solution Approach 1:
The patent segments the laser processing into distinct functional zones with optimized parameters: a high-power focal zone for rapid melting and fusion, a transition zone for controlled cooling and crystallization, and a peripheral zone for gentle heating. This spatial segmentation allows complex thermal histories to be achieved through simple, localized parameter adjustments, managing device complexity while maintaining high structural quality.
Solution Approach 2:
The patent employs periodic pulsed laser delivery with varying duty cycles and pulse durations. By modulating the laser output in periodic sequences (high-power short pulses for melting, lower-power longer pulses for crystallization), the system achieves complex thermal processing through temporally varying simple on/off control, reducing the need for continuously variable complex parameter control.
4Adaptability or versatility
If in-situ material processing is implemented in vacuum, then adaptability to non-terrestrial environments is improved, but manufacturing precision deteriorates due to environmental challenges
Solution Approach 1:
The patent implements multi-sensor feedback systems that monitor processing conditions in real-time (temperature, particle morphology, layer density, laser power stability) and automatically adjust parameters to compensate for environmental variations. This closed-loop control maintains manufacturing precision despite the challenging vacuum and temperature conditions of non-terrestrial environments.
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 construction of robust, low thermal expansion structures using non-terrestrial materials in a vacuum, adaptable to varying environmental conditions, with controlled crystallization and density, suitable for lunar and other off-planet applications.
Implementation Method 1
adaptive levels of energy may be generated by one or more lasers
Implementation Method 2
applying adaptive levels of energy applied to a subset of indigenous particulate to form structures
Implementation Method 3
crystallization of indigenous particulate
Implementation Method 4
controlling temperature and crystallization to create ceramic-glass sub-structures
Data Source
AI summary
Various embodiments relate generally to additive manufacturing and construction techniques to form structures with embodiments directed to computer software and systems, and control systems, and, more specifically, to a computing and a mechanical platform configured to implement local material to form a structure by selecting or filtering a subset of particulate that is deposited in a form at which adaptive levels of energy are applied to construct structures in-situ in a vacuum additively (e.g., three-dimensionally, or in “3D”), whereby adaptive levels of energy may be generated by one or more lasers and may be configurable to control temperatures associated with, for example, crystallization of indigenous particulate.