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  • Adams operations  (1)
  • Propellants and Fuels; Computer Programming and Software  (1)
  • Spacecraft Propulsion and Power; Cybernetics, Artificial Intelligence and Robotics  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Adams Operations for Bivariant K-Theory and a Filtration Using Projective Lines (2000)
    Springer
    K-Theory 21 (2000), S. 101-140 
    Details
    ISSN: 1573-0514
    Keywords: K-theory ; Adams operations ; gamma filtration ; motivic cohomology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We establish the existence of Adams operations on the members of a filtration of K-theory which is defined using products of projective lines. We also show that this filtration induces the gamma filtration on the rational K-groups of a smooth variety over a field of characteristic zero.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007896730627
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    Paper (German National Licenses)
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  • 2
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    PHM Enabled Autonomous Propellant Loading Operations (2017)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The utility of Prognostics and Health Management (PHM) software capability applied to Autonomous Operations (AO) remains an active research area within aerospace applications. The ability to gain insight into which assets and subsystems are functioning properly, along with the derivation of confident predictions concerning future ability, reliability, and availability, are important enablers for making sound mission planning decisions. When coupled with software that fully supports mission planning and execution, an integrated solution can be developed that leverages state assessment and estimation for the purposes of delivering autonomous operations. The authors have been applying this integrated, model-based approach to the autonomous loading of cryogenic spacecraft propellants at Kennedy Space Center.
    Keywords: Spacecraft Propulsion and Power; Cybernetics, Artificial Intelligence and Robotics
    Type: SSTI-2200-0146 , IEEE Aerospace Conference; Mar 04, 2017 - Mar 11, 2017; Big Sky, MT; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Integrated System for Health Management and Autonomous Control (ISHM-AC) for Cryogenic Operations on the Simulated Propellant Loading System (2016)
    In:  CASI
    Details
    Publication Date: 2019-09-17
    Description: Autonomous control systems represent a technological barrier from manual and automated operated control systems in an industry wide application. An increase in energy-efficient storage, transfer and use of cryogens and cryogenic propellants on Earth and in space has been observed in space related industries between NASA, government and commercial programs. An increase in efficiency of cryogenic systems demands an increase in the capabilities of the control and monitoring system that manages them. As new technologies are developed for cryogenic systems, complexity and capability increases. The increase in complexities are a natural drive to develop better and more capable health monitoring and control system management. Current research and development efforts lead the Cryogenics Test Laboratory at the Kennedy Space Center to improve its automated control and health monitoring system from a Programmable Logic Control (PLC) based-only system to a fully Integrated System for Health Management (ISHM) - Autonomous Control (AC) capable of performing autonomous operations on a cryogenic propellant transfer system. This ISHM-AC system has been developed and tested by controlling a complete simulated propellant transfer operation. The capabilities and test results of this fully integrated autonomous system for cryogenics propellant transfer operation will be presented in this paper.
    Keywords: Propellants and Fuels; Computer Programming and Software
    Type: KSC-E-DAA-TN34152-2 , AIAA Propulsion and Energy Forum 2016; Jul 25, 2016 - Jul 27, 2016; Salt Lake City, UT; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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