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In-Space Manufacturing and Assembly
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In-Space Manufacturing and Assembly

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Aerospace Science and Engineering".

Deadline for manuscript submissions: closed (30 January 2024) | Viewed by 3000

Special Issue Editors

Prof. Dr. Shaofan Zhao

E-Mail Website
Guest Editor
1. Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China
2. School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Interests: in-space manufacture; space technologies
Prof. Dr. Pengfei Wang

E-Mail Website
Guest Editor
1. China Academy of Aerospace Science and Innovation, Beijing 100176, China
2. School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, China
Interests: 4D printing; space manufacturing; smart materials and structures

Special Issue Information

Dear Colleagues,

Future spacecrafts are characterized by their modular design, large size, and maintainability. Such developments have always been reliant on new and advanced technologies, such as in-space manufacturing and assembly. In-space manufacturing and assembly (ISMA) enables the in situ manufacturing of spacecrafts in space and serves as a key technology to break through the strict limitations on volume, weight, structural strength, etc. Moreover, ISMA allows a paradigm shift in the design and manufacturing of spacecraft, including space architectures and functional components. In accordance with space application requirements, ISMA aims to develop the corresponding manufacturing technologies suitable for the space environment, Thus, realizing ISMA requires cross-cooperation in multiple research fields, including the theory and method of spacecraft in-space design and manufacture, advanced manufacturing technology and the related manufacturing mechanisms in the space environment, in-orbit assembly, in-orbit manufacturing validation method and evaluation criteria, in-orbit integration technology, space technologies, etc. Thus, a broader range of investigations to promote the development of ISMA is of particular interest. Full papers, communications, and reviews concerning ISMA are welcomed and invited for inclusion in this Special Issue.

Prof. Dr. Shaofan Zhao
Prof. Dr. Pengfei Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • in-space design and manufacture
  • in-space manufacturing mechanisms
  • advanced manufacturing
  • in-orbit assembly
  • assembly validation and evaluation
  • in-orbit integration
  • space technologies

Published Papers (2 papers)

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Research

27 pages, 5936 KiB  
Article
Towards Lunar In-Situ Resource Utilization Based Subtractive Manufacturing
by André Seidel, Uwe Teicher, Steffen Ihlenfeldt, Konstantin Sauer, Florian Morczinek, Martin Dix, Rick Niebergall, Bernhard Durschang and Stefan Linke
Appl. Sci. 2024, 14(1), 18; https://doi.org/10.3390/app14010018 - 19 Dec 2023
Viewed by 1217
Abstract
In recent years, space agencies, such as the National Aeronautics and Space Administration (NASA) and European Space Agency (ESA), have expanded their research activities in the field of manufacturing in space. These measures serve to reduce limitations and costs through fairing size, launch [...] Read more.
In recent years, space agencies, such as the National Aeronautics and Space Administration (NASA) and European Space Agency (ESA), have expanded their research activities in the field of manufacturing in space. These measures serve to reduce limitations and costs through fairing size, launch mass capabilities or logistic missions. The objective, in turn, is to develop technologies and processes that enable on-demand manufacturing for long-term space missions and on other celestial bodies. Within these research activities, in-situ resource utilization (ISRU) and recycling are major topics to exploit local resources and save transport capacity and, therefore, costs. On the other hand, it is important to carefully consider which items can be brought and which must be manufactured on the Moon. Consequently, on-demand needs in future space missions are considered regarding frequency, raw material and required manufacturing processes according to investigations by ESA and NASA. In conclusion, manufacturing in space state-of-the-art shows a strong focus on additive processes, primarily considering semicrystalline or amorphous plastics. The subtractive processing of metallic or ceramic materials, in turn, currently represents a research gap. Consequently, an approach for in-situ resource utilization-based subtractive manufacturing in space is presented to supplement the existing processes. The latter uses a high-pressure jet of water, with regolith simulate as abrasive in suspension, being directed at the workpiece, which is moved to separate metal and glass. Proof-of-concept results are presented, including suitable process windows, achieved cutting geometries, as well as the effects of parameter variations on the system technology and consumables used. The focus of the investigations supplements the general requirements for the design of machine tools for space applications with inertial process-specific boundary conditions as a step towards higher technology maturity. Full article
(This article belongs to the Special Issue In-Space Manufacturing and Assembly)
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22 pages, 8396 KiB  
Article
Collision Risk Assessment and Operation Assistant Strategy for Teleoperation System
by Shigang Peng, Xiang Cheng, Meng Yu, Xiangchao Feng, Xinyu Geng, Shaofan Zhao and Pengfei Wang
Appl. Sci. 2023, 13(7), 4109; https://doi.org/10.3390/app13074109 - 23 Mar 2023
Viewed by 1256
Abstract
Teleoperation robots remain superior to fully automated robots in complicated and unstructured environments (e.g., in-orbit assembly). However, the collision risk is also greatly increased in these environments. Therefore, the teleoperation robot should possess the capability of collision risk perception and be configured with [...] Read more.
Teleoperation robots remain superior to fully automated robots in complicated and unstructured environments (e.g., in-orbit assembly). However, the collision risk is also greatly increased in these environments. Therefore, the teleoperation robot should possess the capability of collision risk perception and be configured with security assistance strategy to improve safety and efficiency. With this objective in mind, this paper proposes a collision risk assessment system based on fuzzy theory, which comprehensively considers the effects of shortest distance, operation speed, and delay time. The introduction of fuzzy theory makes the risk assessment results more accurate. Furthermore, this paper also proposes a creative discrete expandable bounding box method to make the calculation of the nearest distance between complicated obstacles and the robot more efficient and faster. Secondly, to improve the safety and efficiency of teleoperation, this paper proposes a set of teleoperation assistance strategies for teleoperation robots based on collision risk. The strategies include partial view highlighting, variation in the motion mapping ratio, and haptic risk warning, all of which are achieved in the graphical interactive interface. Finally, this paper verifies the proposed collision risk model and the operation assistant strategy through experiments. The results show that the proposed fuzzy collision risk model has a correct trend with risk factors, and the proposed operation assistance strategies can effectively reduce the robot collision risk and improve the safety of teleoperation robots. In conclusion, this research contributes to the collision risk assessment and obstacle avoidance assistance strategy of teleoperation robots. Full article
(This article belongs to the Special Issue In-Space Manufacturing and Assembly)
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