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Political sustainability in space exploration: A game theoretic approach

Political sustainability in space exploration: A game theore...

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AIAA Space 2005 Conference and Exposition

作者： Broniatowski, D.A. Weigel, A.L. Massachusetts Institute of Technology Cambridge MA 02139 Aeronautics and Astronautics/Technology and Policy Program 77 Massachusetts Ave. AIAA Aeronautics and Astronautics and Engineering Systems 77 Massachusetts Ave.

ISBN: (纸本)1563477386

The swiftly changing nature of the policy environment introduces significant uncertainty into the design of those technical systems that rely on public resources. Politics, the process through which stakeholders possessing different values and interests interact, necessarily. impacts technical design as requirements change to suit different needs. Simple game-theoretic models may be used to provide insights into resource allocation dynamics between NASA and the U.S. Congress. This paper utilizes game theory, with a particular emphasis on Brams' Theory of Moves, to model the process by which stakeholders within NASA and the U.S. Congress may cooperate or compete to arrive at an affordable and politically sustainable funding level on a yearly basis. In doing so, this paper advances a game-theoretic definition of political sustainability.

关键词： Space research

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Modularity in spacesuit design: Using form-to-function mapping to inform design choices

Modularity in spacesuit design: Using form-to-function mappi...

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AIAA Space 2005 Conference and Exposition

作者： Jordan, Nicole C. Arnold, Julie A. Massachusetts Institute of Technology Cambridge MA 02139 Department of Aeronautics and Astronautics Technology and Policy Program 77 Massachusetts Ave 37-219 AIAA Department of Aeronautics and Astronautics 77 Massachusetts Ave 37-219

ISBN: (纸本)1563477386

The purpose of this paper is to explore the means by which flexibility can be incorporated into the design of spacesuits. Because tbe design lifetime of spacesuits is on the order of decades, it is important that they be able to adapt to change in their requirements. Flexibility is defined as the ability for a system to meet changes in requirements after it has been fielded. We argue that one means of achieving flexibility is via modular design, defined as a one-to-one mapping between form and Function. Through examination of the form decompositions and form-to-function maps of the U.S. Spacesuit, the Extravehicular Mobility Unit (EMU), it is apparent that the EMU's architecture is highly integrated. Reorganizing the form decomposition of the EMU to group similar components leads to a more modular and thus flexible architecture. A similar technique could be used to evaluate proposed architectures for future spacesuits.

关键词： Spacecraft

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Heavy lift launch: When is bigger not better?

Heavy lift launch: When is bigger not better?

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1st Space Exploration Conference: Continuing the Voyage of Discovery

作者： Silver, Matthew Massachusetts Institute of Technology Cambridge MA 02139 Massachusetts Institute of Technology Department of Aeronautics and Astronautics Technology and Policy Program 77 Massachusetts Ave.

ISBN: (纸本)1563477270

NASA has been challenged to return to the moon by 2020, and eventually explore Mars and the rest of the solar system. A decision must be made soon regarding the key enabling technology of heavy-lift-launch. The problem is complex, encompassing the cost and performance of the launch system and its impact on in-space-designs and exploration missions for decades to come, among other factors. From an economic perspective, the heart of the issue involves competing factors of economies of scale in production and at launch, and the reliability-dependant expected-costs at launch and associate with in-space assembly. This paper frames the launch decision as a problem of capacity choice. It develops a high-level cost and risk model to evaluate how competing factors trade against capacity from mission-specific and life-cycle perspectives. The model demonstrates that, among other findings, from a purely economic perspective the risk associated with many small launches verse one large launch balance. Further, given current technology, economies of scale at launch are the dominant factor in determining overall mission cost, rather than economies of scale in production. However, these finding are sensitive to assumed scale effects and learning affects associated with variations in production rate-suggesting that these variable must be known with accuracy for each launch system, if a sound architectural decision is to be made.

关键词： Space research

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The effect of uncertainties in architectural design elements on potential non-commercial on-orbit satellite servicing markets

The effect of uncertainties in architectural design elements...

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AIAA Space 2005 Conference and Exposition

作者： Long, Andrew Hastings, Dr Daniel Massachusetts Institute of Technology Cambridge MA 02139 United States Department of Aeronautics/Astronautics Technology and Policy Program Massachusetts Institute of Technology Cambridge MA AIAA Engineering Systems Division Massachusetts Institute of Technology Cambridge MA

ISBN: (纸本)1563477386

On-orbit satellite servicing is the process of providing a service to a satellite in orbit. Such services can be relocation, refueling, repair, or upgrades. Despite the vast majority of papers written on the topic, the problem with the development of on-orbit satellite servicing is not technical. To resolve the issues with on-orbit satellite servicing development their needs to be a shift from technical analysis to a value-based analysis. From a basic standpoint, the purpose of on-orbit servicing is to provide additional value to the operator of the satellite being serviced. Adopting this assumption, if the additional value provided by on-orbit servicing is greater then the value of traditional satellite designs then servicing makes sense. By focusing on value-based analysis, the operator's maximum servicing price can be found by determining the point at which the value of servicing is zero. Through adopting this approach this article will convey findings with regards to an operator's maximum servicing price by walking through the case of a non-commercial satellite upgrade. In addition to explicitly determining the maximum servicing price for a particular scenario, sensitivity analysis will be performed on the different characteristics of the example in order to understand how changes in the servicing case affect the operator's maximum servicing price. By understanding how to affect the maximum servicing price it can be determined what characteristics of satellite servicing provide the greatest potential for creating a feasible on-orbit servicing market. Finally, from the sensitivity analysis a satellite service provider can begin to understand the characteristics that should be emphasized in their servicer design, and potential servicing market, in order to create a feasible servicing market for non-commercial satellites. Copyright © 2005 by the American Institute of aeronautics and astronautics, Inc. All rights reserved.

关键词： Satellite communication systems

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Paradigm shift in design for NASA's space exploration initiative: Results from MIT's spring 2004 study

Paradigm shift in design for NASA's space exploration initia...

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1st Space Exploration Conference: Continuing the Voyage of Discovery

作者： Taylor, Christine Broniatowski, David Boas, Ryan Silver, Matt Crawley, Edward De Weck, Olivier Hoffman, Jeffrey Massachusetts Institute of Technology Cambridge MA 02139 United States 77 Massachusetts Ave. United States Aeronautics and Astronautics/Technology and Policy Program 77 Massachusetts Ave. United States Engineering Systems Division 77 Massachusetts Ave. United States Aeronautics and Astronautics and Engineering Systems Division 77 Massachusetts Ave. United States

ISBN: (纸本)1563477270

This paper summarizes the findings of a comprehensive study commissioned by NASA's space architect and conducted by graduate students and faculty at MIT during spring 2004. The goal of the study was to broadly analyze implications of NASA's new space exploration initiative at the value, system architecture and vehicle levels. The space exploration system is expected to accomplish a wide variety of defined and undefined mission objectives throughout its lifetime, while doing so with limited resources. As a result, the traditional view of designing an optimal system that satisfies current mission objectives is no longer an effective design approach. A new approach is needed in which the system's lifecycle is considered throughout the design process, and environmental factors such as political and budgetary uncertainty are incorporated alongside more traditional factors such as technology development and scientific interests. To promote a sustainable system design, the first step in the design process is the identification of the true value delivered by the system to its stakeholders. In this paper we argue that the true value of an exploration system is knowledge acquisition, not simply transportation of humans and cargo to planetary surfaces. The new design process is defined and then applied to the space exploration system with decisions and analysis guided by knowledge delivery as the ultimate purpose, resulting in the design of a sustainable exploration system.

关键词： Space research

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Catching the wave: A unique opportunity for the development of an on-orbit satellite servicing infrastructure

Catching the wave: A unique opportunity for the development ...

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A Collection of Technical Papers - AIAA Space 2004 Conference and Exposition

作者： Long, Andrew Hastings, Daniel Massachusetts Institute of Technology Cambridge MA 02139 Aeronautics and Astronautics/Technology Policy and Program MIT Engineering Systems Division MIT

ISBN: (纸本)1563477203

On-Orbit Servicing (OOS) has been a progressively researched topic in satellite operations for almost two decades. However, OOS has yet to be developed due to the high costs and technical requirements associated with proposed designs along with the state of the satellite market over that period of time. Refueling commercial geosynchronous communications satellites at the end-of-life offers a unique low-cost low-risk opportunity for the development of an initial on-orbit servicing market. By evaluating the feasibility of end-of-life refueling from the customer perspective, on-orbit servicing can be evaluated without the need to design and evaluate a servicing infrastructure. In this analysis the feasibility of end-of-life refueling is strictly based on the price for refueling, which is dictated by the service provider. Consequently the customer's decision to service or not service is based on the service provider's asking refueling price and the customer's own unique economic restrictions. In examining the end-of-life refueling case for two real world communications satellites, it was discovered that there is a sufficient serviceable market and benefit for potential customers to justify the development of end-of-life refueling. Copyright © 2004 by the American Institute of aeronautics and astronautics, Inc. All rights reserved.

关键词： Satellite communication systems

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Astronaut bio-suit system to enable planetary exploration

Astronaut bio-suit system to enable planetary exploration

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International Astronautical Federation - 55th International Astronautical Congress 2004

作者： Newman, Dava J. Bethke, Kristen Carr, Christopher Hoffman, Jeffrey Trotti, Guillermo Department of Aeronautics and Astronautics Technology and Policy Program Massachusetts Institute of Technology Department of Aeronautics and Astronautics 77 Massachusetts Avenue Cambridge MA 02139 United States Harvard-MIT Division of Health Sciences and Technology Trotti and Associates Inc. 28 Waldron Court Marblehead MA 01945 United States

The Bio-Suit System concept is designed to revolutionize human space exploration by providing enhanced astronaut extravehicular activity (EVA) locomotion and performance, based on the idea of a 'second skin' capability and of biomechanically and cybernetically augmented human performance capacity. The novel Bio-Suit concept provides an overall exploration system realized through symbiotic relationships between a suite of advanced technologies, creative design, and human modeling and analysis. By working at the intersection of engineering, design, and operations, new emergent capabilities and interrelationships could help realize the new Vision for Space Exploration. The second skin envisioned is capable of augmenting our biological skin by providing mechanical counter pressure. Perhaps the 'epidermis' of such a second skin will be a 'spray-on' polymer providing natural locomotion for explorers. Several concepts for a mechanical counter pressure suit have been developed, and subsequently, initial prototypes have been tested. To determine engineering requirements for future prototypes, the three-dimensional anthropometry of the moving human body has been studied.

关键词： Space probes

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To reduce or to extend a spacecraft design lifetime?

To reduce or to extend a spacecraft design lifetime?

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A Collection of Technical Papers - AIAA Space 2004 Conference and Exposition

作者： Saleh, Joseph H. Torres-Padilla, Juan-Pablo Hastings, Daniel E. Newman, Dava J. Massachusetts Institute of Technology Cambridge MA 02139 Ford-MIT Alliance E40-247 Technology and Policy Program E40-371 Department of Aeronautics and Astronautics and Engineering Systems Engineering Systems Division E40-257 Technology and Policy Program 33-307

ISBN: (纸本)1563477203

The engineering and economic issues at stake for reducing or extending a complex system's design lifetime were analyzed using spacecraft as example. The question of whether there was an optimal design lifetime for complex engineering systems in general and spacecraft in particular was addressed. It was shown that even if it was technically feasible to field a system or launch spacecraft with a longer lieftime, it was not necessarily in the best interest of an operator, and definitely not in the interest of the manufacturer, to do so. Overall, it was shown that the specification or selection of a complex engineering system's lifetime required careful consideration and required much more attention than it had received in the literature.

关键词： Large scale systems

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To reduce or to extend a spacecraft design lifetime? What is at stake, for whom, and how to resolve the Dilemma

To reduce or to extend a spacecraft design lifetime? What is...

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A Collection of the 22nd AIAA International Communications Satellite Systems Conference and Exhibit

ISBN: (纸本)1563477122

Various issues at stake for reducing or extending a spacecraft design lifetime are examined from an operator, manufacturers and societies perspective. The approach adopted in addressing these issues constitutes a fundamental addition to the traditional thinking about system design and architecture, and involved quantitative analyses of both dynamics and volatility of the market the system is serving in the case of a commerical venture. These issues require careful consideration and attention as the impact of a system's design is substantial and affects entire industry value chain. The results indicated that optimal design lifetimes do exist that maximizes a system's financial/value metric.

关键词： Spacecraft

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Explore space: Integrating space biomedical engineering education and research

Explore space: Integrating space biomedical engineering educ...

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International Astronautical Federation - 55th International Astronautical Congress 2004

作者： Newman, Dava J. Marquez, Jessica J. Wagner, Erika B. Merfeld, Daniel Trotti, Guillermo Department of Aeronautics and Astronautics and Engineering Systems Massachusetts Institute of Technology Cambridge MA United States Technology and Policy Program Massachusetts Institute of Technology Cambridge MA United States Department of Aeronautics and Astronautics Massachusetts Institute of Technology Cambridge MA United States Harvard-MIT Division of Health Sciences and Technology Massachusetts Institute of Technology Cambridge MA United States Department of Otology and Laryngology Harvard Medical School Jenks Vestibular Physiology Laboratory Massachusetts Bye and Bar Infirmary Boston MA United States Trotti and Associates Inc. Marblehead MA United States

The Explore Space curricular efforts highlight the development of two post-graduate courses, namely, Space Biomedical Engineering and Life Support Systems and Sensori-Neural Systems, developed and taught at the Massachusetts Institute of technology (MIT). Innovative, modular curriculum has been developed to coincide with long-duration human spaceflight research areas. Astronaut performance, exercise, revolutionary spacesuit design, and physiological deconditioning of bones, muscles, and the heart provide motivational themes. Selected topics were adapted for use in undergraduate courses and disseminated to hundreds of children through global outreach. Traditional methods of science and engineering education can no longer be the pedagogical model to meet the needs of a generation of students raised in an increasingly visual, interactive information technology (IT) world. Our outreach efforts culminate in the design of an interactive learning environment, the Knowledge Station, which is a high-impact design workstation for one or two users that facilitates immersive learning. Three Explore Space outcomes are to: 1) Provide multi-level space life sciences curriculum, 2) Excite and educate the public about the wonders of science, engineering and medicine by disseminating knowledge gained through research, and 3) Develop a set of innovative pedagogical strategies that implement tested learning principles as a basis for comprehensive educational evaluation.

关键词： Life support systems (spacecraft)

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