This paper provides an overview of the current progress in developing and evaluating the initial version of the Common Space systems Ontology (CSSO) for implementation within NASA's Advanced Concepts Office (ACO) ...
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ISBN:
(数字)9781624107115
ISBN:
(纸本)9781624107115
This paper provides an overview of the current progress in developing and evaluating the initial version of the Common Space systems Ontology (CSSO) for implementation within NASA's Advanced Concepts Office (ACO) at Marshall Space Flight Center. The CSSO serves as a shared conceptual framework for modeling aerospace system concepts in a Pre-Phase A conceptual design context, facilitating the transition towards a more model-based paradigm. The ontology has been primarily constructed using the Ontological modeling Language (OML). While the majority of the ontology is still in its early stages of development, this paper outlines the ongoing efforts and presents the current status of the CSSO. The completeness and effectiveness of the CSSO is evaluated through the modeling of an example system: the Lynx X-ray Observatory. This case study enables evaluation of the CSSO's capability in meeting the specific use cases identified by the ACO. Recommendations for improvements to the CSSO based on this study are provided, along with suggestions for future development.
Many modern engineering problems are inherently multidisciplinary, requiring input from a variety of subject matter experts. Each discipline may impose its own computational requirements, potentially conflicting with ...
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ISBN:
(数字)9781624107115
ISBN:
(纸本)9781624107115
Many modern engineering problems are inherently multidisciplinary, requiring input from a variety of subject matter experts. Each discipline may impose its own computational requirements, potentially conflicting with other disciplines. Compounding this, in many fields, experts use specific software that may not interface easily with other disciplines. Therefore, combining multiple fields into multidisciplinary design optimization (MDO) may entail significant work on analysis tool interfaces. This paper proposes a standard data and communication interface for MDO applications. Requirements for such a standard are discussed before reviewing relevant technologies. The data conventions and communication protocol for the proposed standard, Philote, are detailed for both explicit and implicit disciplines. Numerical studies were conducted to benchmark performance and quantify latency as well as to demonstrate Philote's ability to operate over large geographical distances. Finally, the wider ramifications of the proposed standard are discussed with a particular focus on heterogeneous and cloud-native computing.
In the context of PLATO Camera Subsystem development, it has been decided to take advantage of MBSE methodologies using Enterprise Architect by Sparx systems as tool. A Local SysML Camera model for PLATO mission(1) ha...
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ISBN:
(纸本)9781510675216;9781510675223
In the context of PLATO Camera Subsystem development, it has been decided to take advantage of MBSE methodologies using Enterprise Architect by Sparx systems as tool. A Local SysML Camera model for PLATO mission(1) has been built from different Excel spreadsheets, i.e. Verification Control Matrices, released by Subsystems. Same approach has been used for the Camera-system itself. The complete flow-down of requirements has been created in order to easily identify and monitor any impact on the design due to changes, deviations and non-compliances. The model can be updated at any time importing Excel spreadsheet while it can be used as source to export documentation needed during formal reviews, both as Word and Excel files. In addition, model architecture and constraints have been created through Block Definition Diagram and Internal Block Diagram so that structure, interfaces as well as interaction between different items, can be easily identified and monitored at both system and Subsystem level.
The value proposition of implementing an active digital curation capability within an aerospace system product development life cycle is qualitatively examined. This first evaluation is necessary to incentivize method...
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ISBN:
(数字)9781624107115
ISBN:
(纸本)9781624107115
The value proposition of implementing an active digital curation capability within an aerospace system product development life cycle is qualitatively examined. This first evaluation is necessary to incentivize methodology demonstration and software development tailored for a science and technology ecosystem. For complex digital ecosystems, active digital curation and resourcing of the appropriate infrastructure is necessary to accelerate secure sharing of digital materiel across diverse stakeholder groups. Digital curation use cases are examined for specific domains involving modeling and simulation, ground testing, and flight testing activities. Experience generating and curating artifacts for these use cases suggests that active digital curation is useful for informing near-term digital product development and enabling longer-term digital materiel management. Existing examples of digital curation life cycles are examined and discussed. As the time horizon increases, active digital curation may be viewed as an enabling capability for digital materiel management, and becomes a critical-path activity for accelerating digital concept maturation and transition to stakeholders. Active digital curation functionality should be considered as a fundamental requirement for an organization's digital transformation to augment passive knowledge management best practices.
In order to meet the demands of the current global economy, a study of agile teams at NASA was conducted by the NASA engineering and Safety Center (NESC) to explore how the Agency can become more adaptable and flexibl...
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ISBN:
(数字)9781624107115
ISBN:
(纸本)9781624107115
In order to meet the demands of the current global economy, a study of agile teams at NASA was conducted by the NASA engineering and Safety Center (NESC) to explore how the Agency can become more adaptable and flexible due to several influences, including the maturity and availability of digital tools and NASA's increased reliance on commercial providers. NESC Technical Discipline Teams (TDTs) perform annual studies to understand the needs of their stakeholders, establish a state of the discipline, and inform strategic planning efforts. As part of the 2022 interview series, the systems engineering TDT utilized the dissertation work of Dr. Jackelynne Silva-Martinez that focused on NASA agile teams. The systems engineering TDT partnered with the Software and Human Factors TDTs on the formulation of interview questions and subsequent solicitation of customer inputs, which helped attract diverse agile teams across the Agency. 34 participants were interviewed, including civil servants and contractors, with open-ended questions related to their teams' adoption and transition to agile. Participants were also questioned about their perceptions of the implementation of agile approaches across the Agency. Results showed a consistent framing of agile as incremental knowledge growth, a way of showing progress, and as the incorporation of frequent customer feedback. However, participants emphasized a lack of a common understanding of agile across the Agency, which sometimes caused managers and engineers to be reluctant to accept and support them. Results also showed the most successful agile teams had formal training with over five years of agile experience, used retrospectives, and tailored their agile processes for their specific situation and needs. This paper provides details of the interview responses gathered in the study and suggests actions for NASA to become more agile.
Advanced digital technologies across engineering and manufacturing must take the U.S. manufacturing ecosystem to the forefront of modernization and Industry 4.0. Many chokepoints impede readiness. Among the most criti...
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ISBN:
(数字)9781624107115
ISBN:
(纸本)9781624107115
Advanced digital technologies across engineering and manufacturing must take the U.S. manufacturing ecosystem to the forefront of modernization and Industry 4.0. Many chokepoints impede readiness. Among the most critical challenges is a sustained pipeline of on point, skills-based labor to support underpinning model-basedengineering processes and practices. This paper describes an education model that can be replicated geographically to strengthen and grow this foundational workforce. Its threefold approach to energize development of the model-basedsystems engineering (MBSE) workforce incorporates: systems engineering Technology (SET) curriculum deployed through community colleges;short-term courses for upskilling existing professionals;and consultancy support for both emerging and mature industries.
Computational physics simulations are an important tool for accelerating the design and analysis of new aircraft and maintaining legacy weapons systems. The cost of high-fidelity simulations is prohibitive for the par...
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ISBN:
(数字)9781624107115
ISBN:
(纸本)9781624107115
Computational physics simulations are an important tool for accelerating the design and analysis of new aircraft and maintaining legacy weapons systems. The cost of high-fidelity simulations is prohibitive for the parametric analysis needed to develop systems engineeringmodels, explore the design trade space, provide data to mission models, and quantify uncertainty and sensitivity to variable input conditions as part of a digital engineering (DE) ecosystem. As a result, most DE processes and mission models frequently use empirical models trained on older configurations and data sets for performance prediction. As faster-paced design and manufacturing become more prevalent, decisions made earlier in the program can have significant cost and schedule impacts later. Using computational physics models that represent the actual geometry and flight conditions, not empirical approximations, becomes increasingly critical. Surrogate models offer an opportunity to bring computational physics analysis into the DE ecosystem through trained models with fast inference using training data provided by HPC-based computational physics simulations. This paper summarizes a new effort initiated by the DoD HPCMP to pursue computational tools capable of producing production-quality surrogate models usable in DoD acquisition programs.
This paper presents a novel approach to the development of an intelligent workflow engine utilising an artificial intelligence (AI) chatbot. The proposed system combines the advantages of traditional workflow manageme...
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ISBN:
(数字)9781624107115
ISBN:
(纸本)9781624107115
This paper presents a novel approach to the development of an intelligent workflow engine utilising an artificial intelligence (AI) chatbot. The proposed system combines the advantages of traditional workflow management systems with the power of AI to provide an efficient, user-friendly and highly customisable solution for workflow generation. The chatbot acts as a natural language interface for users to interact with the system, reducing the learning curve and increasing usability. The intelligent workflow engine uses Natural Language Processing (NLP) techniques by applying Large Language models (LLMs) to enable seamless communication between users and the system. The AI chatbot actively helps users to create workflows based on their needs and supports them in making decisions, streamlining and automatically generating the entire workflow. The new methodology is integrated into an existing software framework for process automation and collaboration in the field of aircraft propulsion systems, extending an existing traditional workflow management system. Full insight into the implementation is provided. To validate the performance and flexibility of the extended workflow engine, the methodology is applied to generic workflows, each representing a unique challenge in workflow architecture. This involves investigating different LLMs and LLM parameters. Finally, the application and evaluation of the methodology is demonstrated by means of a specific application from the field of propulsion technology.
A major issue for project management, besides handling schedules and deadlines, is the process of finding and extracting the most relevant information from a variety of different software solutions used by the differe...
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ISBN:
(纸本)9781510675216;9781510675223
A major issue for project management, besides handling schedules and deadlines, is the process of finding and extracting the most relevant information from a variety of different software solutions used by the different stakeholders. This often leads to enormously large Excel sheets that try to identify the most up-to-date versions of the documents needed, which are extremely time-consuming to maintain, inefficient for finding inf ormation, and prone to err ors. The contemporary methodology we introduce represents a paradigm shift in project management, eschewing the traditional model of isolated databases for documents, such as requirements, CAD data, and Gantt chart schedules. Instead, we propose an integrated database architecture that consolidates all project management needs into a single, user-friendly repository. This, coupled with a web-based interface, facilitates the retrieval of relevant information in a straightforward and dependable manner. Illustrated through the case study of ELT-MICADO, we present the implementation of this strategy using Siemens Teamcenter, an industry standard software solution that is adapted to our specific needs. This exposition is not intended as an endorsement of the product but rather as an exemplification of one potential solution. It is acknowledged that alternative software solutions may offer comparable functionality and performance.
The growing number of space assets populating Earth's orbit puts an increasing strain on resource allocation of ground communication antennas. Radio frequency (RF) communication with these satellites is possible t...
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ISBN:
(数字)9781624107115
ISBN:
(纸本)9781624107115
The growing number of space assets populating Earth's orbit puts an increasing strain on resource allocation of ground communication antennas. Radio frequency (RF) communication with these satellites is possible through ground station antennas. The RF communication spectrum has become saturated to the point that it is not sustainable to constrain future ground antenna designs to exclusively communicate within the RF range. The under-utilized optical communication frequency band offers an alternative for ground station antenna to satellite communication. Free Space Optical (FSO) communication utilizes optical wavelengths to facilitate the transmission, and reception of free space signals. National Aeronautics and Space Administration's (NASA's) Deep Space Network (DSN) has proposed a novel hybrid design to retrofit an existing 34-meter RF communication ground station antenna at the Goldstone Complex with FSO communication equipment to also receive optical signals. However, there are more challenges when it comes to establishing an FSO communication link compared to an RF communication link. Link margin analysis of an FSO communication link is essential when designing a complex ground communication system. This paper presents a single executable simulation model of the DSN's envisioned hybrid optical communication ground station that performs link margin analysis, and ground hardware configuration utilizing space asset data through Ansys' systems Tool Kit (STK). The DSN hybrid communication model further demonstrates how using model-baed systems engineering (MBSE) can overcome the atmospheric attenuation affecting an FSO communication link by varying ground station hardware constraints which facilitates ground station engineers to develop and build successful complex ground systems.
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