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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A Concept Design to Enable Lunar Mining

Svensson, Filip, Persson, Kian January 2022 (has links)
The space industry has been accelerating technological evolution since its inception. It has resulted in countless innovations being adapted and eventually finding their way into people's everyday life. It has also played a significant role in understanding life itself and the circumstances that are necessary to support it. A crucial step in obtaining an even further understanding of humanity's place in the universe is truly comprehending the Moon and its mysteries. In order to do the previously mentioned a manned research operation to the Moon is necessary. However, doing this requires an in-situ resources utilization (ISRU) approach due to the complexity as well as cost of launching material and equipment to space. The Moon holds a lot of valuable resources from which several critical substances and materials can be extracted, e.g., oxygen and hydrogen. In order to make use of the locally available resources, such as the regolith, a standardized approach is necessary.  There are several ways of designing something tasked with mining the Moon as well as enabling supporting activities, e.g., infrastructure development. A Design Thinking approach was used in order to get clarity regarding on how a concept doing this might look like. This thesis deals with the topic on a high, conceptual level due to the complexity of the subject. The needfinding and literature study provided background and context to design a solution enabling the earlier mentioned goal. The solution is a swarm system of Lunar rovers that are capable of operating together, as a unit, as well as on their own depending on the nature of the task that is performed. The activities are performed by interchangeable tool modules operated by the robots rather than the robots themselves. This provides prerequisites for a more flexible as well as resilient mission operation compared to many other scenarios. The interchangeable modules mechanism is the most important aspect of the proposed concept. Another important aspect concerning the platform of the concept is that it enables an infrastructure for new activities post-launch as long as the module fulfills some constraints. The thesis provides concepts for the robot, a regolith collector module as well as the container module. As a means of verifying the concept, a subsystem was selected and tested. The subsystem that was chosen was the module exchanging mechanism. Thus, a conceptual version of this was built and tested. The test was delimited and intended to determine whether an approach using screws and movable arms was appropriate to pick up a simplified container module. The test performed concluded that the subsystem has potential, even though a more similar mechanism to the one actually envisioned would be necessary to test. However, there are certain iterations that beneficially may be performed prior to a complete representation of the module equipping mechanism is built.
2

A Conceptual Design to Enable Lunar 3D Mapping : Analysis Based Design of A Mechanism to Facilitate Electrical Sensor Packaging and Deployment on The Lunar Regolith

Shahrokhi, Fatemehsadat, Keipour, Soheil January 2023 (has links)
The prospect of mining the moon to extract valuable resources that facilitates upcoming space exploration is what the space industry invests in, in recent years.The Lunar exploration is a solid stepping stone to enable further space exploratory missions, especially Mars. However, Moon mining is extremely complex and requires infrastructure before it begins. The CSMC is a Lunar regolith mining company which aims to process oxygen and hydrogen for both fuel and life support in-situ. Since it costs a fortune to transport the resources to the Moon’s sites, these operations will support the development of the infrastructure and technology necessary to create a robust ex-terran economy, benefiting humanity for generations to come. To fulfill this goal, the existing resources in the regolith should be detected by 3D mapping the subterrain of the Moon using sensors. These sensors need to be deposited on the Moon by a rover and would relay the signals back to the rover (and eventually the earth) for processing. This project develops a conceptual design for the configuration and deployment of the sensor probes and analysis. This concept would then form the basis for weight, and stowed envelope estimates as well as ConOps requirements. Then the design undergoes structural analysis to validate the concept’s reliability. The main focus of this thesis is on the structural analysis of the design and evaluating it based on the stress and vibration requirements in excessive environmental conditions. To do so, we used the general steps of NASA’s structural analysis procedure in the conceptual design phase which includes stress analysis, modal analysis, optimization, and redesign. Optimizing the weight of the structure has significant importance in the space sector. So, considering the trade-off between the weight and strength of the structure we redesigned the initial design to achieve lower weight. The digital prototyping and analysis is conducted in Autodesk Inventor and the main parts of the systems are prototyped using the 3D printing method to validate the operation feasibility of the mechanism.

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