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13th International Conference on Space Operations, SpaceOps 2014

作者： Fernández, Michela Muñoz Mission Control Systems/Ground System Architecture and Systems Engineering NASA Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Dr. M/S: 264-767 Pasadena CA 91109 United States

ISBN: (纸本)9781624102219

This paper describes the potential of Model-Based systems engineering (MBSE) that uses the architecture Analysis and Design Language (AADL) to model space systems. AADL modeling is applicable to real-time embedded systems- the types of systems NASA builds. A case study with the Juno mission to Jupiter showcases how this work will enable future missions to benefit from using these models throughout their life cycle from design to flight operations. © 2014 California Institute of Technology. Government sponsorship acknowledged.

关键词： NASA

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Soft factors & space mission failures;quantifying the effect of management decisions 52

Soft factors & space mission failures;quantifying the effect...

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52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014

作者： Meshkat, Leila Bryant, Larry Waggoner, Bruce Thomas, Reid Jet Propulsion Laboratory California Institute of Technology Pasadena Ground System Architecture and Systems Engineering 393A 4800 Oak Grove Drive/MS 301-480 CA 91109 United States Jet Propulsion Laboratory California Institute of Technology Pasadena Assurance Management Office 4800 Oak Grove Drive/MS 264-767 CA 91109 United States Jet Propulsion Laboratory California Institute of Technology Pasadena Dawn Mission Operations System Engineer 397A Plan Exec. Sys Eng 4800 Oak Grove Drive/MS 264-856 CA 91109 United States

ISBN: (纸本)9781624102561

Much research has been conducted on the effect of management and organizational factors on the productivity of organizations. Furthermore, these factors have been identified as significant during accident investigations for several NASA incidents. This paper presents a probabilistic, causal, reasoning approach to capture and quantify the dependencies between the key characteristics of management and organizational factors and the likelihood of command file errors. Bayesian Belief Networks are used for modeling these dependencies and expert elicitation methods are used for populating these networks. The result is a model that is representative of a significant body of knowledge and is executable for the purpose of decision support and if-then analyses. This model is presented in the context of the existing body of work in managing command file errors at JPL, the body of academic and theoretical research in the field, and the history of NASA accidents and investigations.

关键词： NASA

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Modeling complex cross-systems software interfaces using SysML

Modeling complex cross-systems software interfaces using Sys...

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AIAA Infotech at Aerospace (I at A) Conference

作者： Mandutianu, Sanda Morillo, Ron Simpson, Kim Liepack, Otfrid Bonanne, Kevin Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Dr. M/S 301-285 Pasadena CA 91001 United States Jet Propulsion Laboratory California Institute of Technology System Software Engineering 4800 Oak Grove Dr. M/S 301-490 Pasadena CA 91001 United States Jet Propulsion Laboratory California Institute of Technology Mission Systems Concepts section 4800 Oak Grove Dr. M/S 321-540 Pasadena CA 91001 United States Jet Propulsion Laboratory California Institute of Technology Mission Operations Systems Engineering 4800 Oak Grove Dr. M/S 301-270 Pasadena CA 91001 United States Jet Propulsion Laboratory California Institute of Technology Ground Systems Architecture and Systems Engineering 4800 Oak Grove Dr. M/S 301- 480 Pasadena CA 91001 United States

The complex flight and ground systems for NASA human space exploration are designed, built, operated and managed as separate programs and projects. However, each system relies on one or more of the other systems in order to accomplish specific mission objectives, creating a complex, tightly coupled architecture. Thus, there is a fundamental need to understand how each system interacts with the other. To determine if a model-based system engineering approach could be utilized to assist with understanding the complex system interactions, the NASA engineering and Safety Center (NESC) sponsored a task to develop an approach for performing cross-system behavior modeling. This paper presents the results of applying Model Based systems engineering (MBSE) principles using the system Modeling Language (SysML) to define cross-system behaviors and how they map to crosssystem software interfaces documented in system-level Interface control Documents (ICDs).

关键词： Modeling languages

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COMMERCIAL APPLICATIONS OF ADVANCED MARINE VEHICLES FOR EXPRESS SHIPPING

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NAVAL ENGINEERS JOURNAL 1983年第3期95卷 283-300页

作者： LUEDEKE, G FARNHAM, RB JR. George Luedeke Jr.: received his BS degree in Mechanical Engineering from Massachusetts Institute of Technology and his MS degree in Product Design from Illinois Institute of Technology. Early in his career Mr. Luedeke joined General Motors Corporation as a designer responsible for development of people mover and rail rapid transit systems. From 1964 to 1974 he was with Hughes Aircraft Company. At Hughes he performed analyses and developed designs for a wide variety of program and proposal efforts such as: High Speed Ground Transportation (DOT) Task Force Command Center (NAVY) Panama Canal Marine Traffic Control Center (Panama Canal Co.) Royal Iranian Navy Command Center (Iran) Tactical Information Processing and Interpretation Center (Air Force) and WALLEYE CONDOR and PHOENIX Missile Systems (NAVY). He also had marketing development responsibilities related to the diversification of Hughes resources in civil business areas such as: Automatic train control (WMATA BARTD SCRTD) water/sewage treatment plant automation (Santa Clara County) Aqueduct Control (SWR) Hydrometeorological data collection (BPA WMO) and Salton Sea basin systems analysis (Dept. of the Interior). He was responsible for combat system integration for the Hughes 2000T Surface Effect Ship (SES) proposal. He also conducted detailed studies concerning ship flexure for the Improved Point Defense Target Acquisition System Program and for the definition of operational High Energy Laser weapon installations on a series of conventional monohulls (DLG DD and CVN). Since 1974 Mr. Luedeke has been employed at RMI Inc. (formerly Rohr Marine Inc.). During this time he has held several positions. His responsibilities have included directing a number of studies on advanced SES concepts managing activities defining mission/cost effectiveness of military and commercial SES's including defining the operational benefits and enhanced survivability characteristics of cargo SES's for high speed military sealiftfor NA TO and Southeast Asia

This paper will present the results of a marketing, engineering, and economic analysis of advanced marine vehicles done by IMA Resources, Inc. and RMI, Inc., in support of a Maritime Administration project to study “Multimode Express Shipping”. The study was conducted in 1981 and examined the economic benefits of using advanced marine vehicles as express cargo vessels in domestic and international service. Commodity characteristics, desirable express carrier rates, and potential high payoff service and route alternatives were identified. Advanced marine vehicles were surveyed and sized to meet desirable deadweight and block speed objectives. The costs of operating these craft on a variety of trade routes were calculated using an advanced marine vehicle economic analysis program. Revenues, expenses, break-even, profit and loss, cash flow requirements, tax summary and economic indicators (i.e., cost/ton – mile, etc.) were projected over the expected life of the vehicles as was return on investment. Traffic density and market penetration considerations narrowed the field of choice to smaller sized advanced marine vehicle carriers (i.e., 50 and 250 ton deadweight) and to three international and five domestic routes.

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