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  • 1
    Electronic Resource
    Electronic Resource
    Using hybrid expert system approaches for engineering applications (1987)
    Springer
    Engineering with computers 2 (1987), S. 95-110 
    Details
    ISSN: 1435-5663
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract In this paper, the use of hybrid expert system shells and hybrid (i.e., algorithmic and heuristic) approaches for solving engineering problems is reported. Aspects of various engineering problem domains are reviewed for a numer of examples with specific applications made to recently developed prototype expert systems. Based on this prototyping experience, critical evaluations of and comparisons between commercially available tools, and some research tools, in the United States and Australia, and their underlying problem-solving paradigms are made. Characteristics of the implementation tool and the engineering domain are compared and practical software engineering issues are discussed with respect to hybrid tools and approaches. Finally, guidelines are offered with the hope that expert system development will be less time consuming, more effective, and more cost-effective than it has been in the past.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01213977
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Using hybrid expert system approaches for engineering applications (1987)
    Springer
    Details
    Publication Date: 1987-06-01
    Print ISSN: 0177-0667
    Electronic ISSN: 1435-5663
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Published by Springer
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    PAPER CURRENT
  • 3
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    Using hybrid expert system approaches for engineering applications (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: In this paper, the use of hybrid expert system shells and hybrid (i.e., algorithmic and heuristic) approaches for solving engineering problems is reported. Aspects of various engineering problem domains are reviewed for a number of examples with specific applications made to recently developed prototype expert systems. Based on this prototyping experience, critical evaluations of and comparisons between commercially available tools, and some research tools, in the United States and Australia, and their underlying problem-solving paradigms are made. Characteristics of the implementation tool and the engineering domain are compared and practical software engineering issues are discussed with respect to hybrid tools and approaches. Finally, guidelines are offered with the hope that expert system development will be less time consuming, more effective, and more cost-effective than it has been in the past.
    Keywords: CYBERNETICS
    Type: Engineering with Computers (ISSN 0177-0667); 2; 2, 19; 95-110
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    The development and technology transfer of software engineering technology at NASA. Johnson Space Center (1992)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The United State's big space projects of the next decades, such as Space Station and the Human Exploration Initiative, will need the development of many millions of lines of mission critical software. NASA-Johnson (JSC) is identifying and developing some of the Computer Aided Software Engineering (CASE) technology that NASA will need to build these future software systems. The goal is to improve the quality and the productivity of large software development projects. New trends are outlined in CASE technology and how the Software Technology Branch (STB) at JSC is endeavoring to provide some of these CASE solutions for NASA is described. Key software technology components include knowledge-based systems, software reusability, user interface technology, reengineering environments, management systems for the software development process, software cost models, repository technology, and open, integrated CASE environment frameworks. The paper presents the status and long-term expectations for CASE products. The STB's Reengineering Application Project (REAP), Advanced Software Development Workstation (ASDW) project, and software development cost model (COSTMODL) project are then discussed. Some of the general difficulties of technology transfer are introduced, and a process developed by STB for CASE technology insertion is described.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: Fifth Annual Workshop on Space Operations Applications and Research (SOAR 1991), Volume 1; p 152-162
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Apollo experience report: Onboard navigational and alignment software (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The onboard navigational and alignment routines used during the nonthrusting phases of an Apollo mission are discussed as to their limitations, and alternate approaches that have more desirable capabilities are presented. A more efficient procedure for solving Kepler's equation, which is used in the calculation of Kepler's problem and Lambert's problem is included, and a sixth-order predictor scheme with a Runge-Kutta starter is recommended for numerical integration. The extension of the rendezvous navigation state to include angle biases and the use of a fixed coordinate system is also evaluated.
    Keywords: SPACE VEHICLES
    Type: NASA-TN-D-6741 , MSC-S-317
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Lunar surface navigation analysis (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The accuracy of the crew position obtained by using a line-of-sight device such as a sun compass or the rover television camera and the prominent mountains such as Hadley and Hadley delta was investigated. It was determined that with errors of 1 deg (noise only), the crew position can be obtained to sigma sub phi = 850 feet and sigma sub lambda = 400 feet using Hadley and Hadley delta. The addition of West Mountain reduced the errors to 600 and 400 feet, respectively.
    Keywords: NAVIGATION
    Type: NASA-TM-X-67443 , MSC-04241 , MSC-IN-71-FM-155
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Shuttle navigation overview (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Space Shuttle onboard navigation system tasks are related to position and velocity determination, attitude determination, sensor management, sensor Redundancy Management (RM), and navigation-related functions such as transformations, timing system utilization, and user processing for displays, guidance, and flight control. It is pointed out that Shuttle navigation is different in at least two areas from previous manned space flight navigation. The differences are related to the use of multiple units to provide protection from increased risk of failure of off-the-shelf-type equipment used for more than one flight, and the need to land at a runway. Attention is given to the navigation sensor system, the Shuttle Inertial Measurement Units, the Shuttle Star Tracker, the Crew Optical Alinement Sight, the Shuttle Tacan, the Air Data Subsystem, and aspects of navigation system mechanization.
    Keywords: SPACE TRANSPORTATION
    Type: AIAA PAPER 82-1558 , Guidance and Control Conference; Aug 09, 1982 - Aug 11, 1982; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
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