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  • 1
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    The Dash Data Sharing System (1994)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: The Data Sharing system (DASH) project was recently undertaken at NASA Johnson Space Center to introduce distributed data sharing into the Mission Control Center (MCC). Although the project focused on MCC communications, the solution is a general one. This paper describes that project. DASH allows applications to share data. It provides callable interfaces for applications wishing to export or import data. The system consists of several processes: publishers make exported data available to subscribers, which provide it to interested importing applications. A network registration service provides network location transparency, allowing the other processes to reside at arbitrary network locations. These processes act as intermediaries between external producing and consuming applications. DASH has been demonstrated in the MCC where it transmits Shuttle electrical bus data from the Bus Loss Smart System to the Configurable Realtime Analysis System. In addition, the Failure Impact and Procedure Analysis system used DASH to transmit Shuttle remote manipulator data from an expert system to a version of CRANS. DASH is currently being used to integrate a knowledge acquisition application and the CLIPS expert system shell.
    Keywords: Computer Systems
    Type: Dual-Use Space Technology Transfer Conference and Exhibition; Volume 1; 103-110; NASA-CP-3263-Vol-1
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Expert system technologies for Space Shuttle decision support: Two case studies (1994)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: This paper addresses the issue of integrating the C Language Integrated Production System (CLIPS) into distributed data acquisition environments. In particular, it presents preliminary results of some ongoing software development projects aimed at exploiting CLIPS technology in the new mission control center (MCC) being built at NASA Johnson Space Center. One interesting aspect of the control center is its distributed architecture; it consists of networked workstations which acquire and share data through the NASA/JSC-developed information sharing protocol (ISP). This paper outlines some approaches taken to integrate CLIPS and ISP in order to permit the development of intelligent data analysis applications which can be used in the MCC. Three approaches to CLIPS/IPS integration are discussed. The initial approach involves clearly separating CLIPS from ISP using user-defined functions for gathering and sending data to and from a local storage buffer. Memory and performance drawbacks of this design are summarized. The second approach involves taking full advantage of CLIPS and the CLIPS Object-Oriented Language (COOL) by using objects to directly transmit data and state changes from ISP to COOL. Any changes within the object slots eliminate the need for both a data structure and external function call thus taking advantage of the object matching capabilities within CLIPS 6.0. The final approach is to treat CLIPS and ISP as peer toolkits. Neither is embedded in the other; rather the application interweaves calls to each directly in the application source code.
    Keywords: DOCUMENTATION AND INFORMATION SCIENCE
    Type: Third CLIPS Conference Proceedings, Volume 1; p 180-190
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Space Smackdown 101 (2011)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Space Smackdown is a competition that involves a collaborative multi-team exercise that engages in constructive simulation of a world with simulation of vehicles deployed in that world including stand-alone and integrated missions.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-CN-24530 , SISO 2011 Fall Simulation Interoperability Workshop; Sep 18, 2011 - Sep 22, 2011; Orlando, FL; United States
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  • 4
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    Assessment of the Draft AIAA S-119 Flight Dynamic Model Exchange Standard (2011)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: An assessment of a draft AIAA standard for flight dynamics model exchange, ANSI/AIAA S-119-2011, was conducted on behalf of NASA by a team from the NASA Engineering and Safety Center. The assessment included adding the capability of importing standard models into real-time simulation facilities at several NASA Centers as well as into analysis simulation tools. All participants were successful at importing two example models into their respective simulation frameworks by using existing software libraries or by writing new import tools. Deficiencies in the libraries and format documentation were identified and fixed; suggestions for improvements to the standard were provided to the AIAA. An innovative tool to generate C code directly from such a model was developed. Performance of the software libraries compared favorably with compiled code. As a result of this assessment, several NASA Centers can now import standard models directly into their simulations. NASA is considering adopting the now-published S-119 standard as an internal recommended practice.
    Keywords: Aeronautics (General)
    Type: AIAA Paper 2011-6583 , NF1676L-11965 , AIAA Modeling and Simulation Technologies Conference; Aug 08, 2011 - Aug 11, 2011; Portland, OR; United States
    Format: application/pdf
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