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  • Cybernetics, Artificial Intelligence and Robotics  (1)
  • INSTRUMENTATION AND PHOTOGRAPHY  (1)
  • 2015-2019
  • 1985-1989  (2)
  • 1965-1969
  • 1960-1964
  • 1
    Publication Date: 2019-06-28
    Description: The development of a miniature multifunction turbomachinery shaft displacement sensor using state-of-the-art non-contract capacitive sensing technology is described. Axial displacement, radial displacement, and speed are sensed using a single probe within the envelope normally required for a single function. A survey of displacement sensing technology is summarized including inductive, capacitive, optical and ultrasonic techniques. The design and operation of an experimental triple function sensor is described. Test results are included showing calibration tests and simultaneous dynamic testing of multiple functions. Recommendations for design changes are made to improve low temperature performance, reliability, and for design of a flight type signal conditioning unit.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-182279 , NAS 1.26:182279
    Format: application/pdf
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  • 2
    Publication Date: 2019-08-14
    Description: Expert Systems which support knowledge representation by qualitative modeling techniques experience problems, when called upon to support integrated views embodying description and explanation, especially when other factors such as multiple causality, competing rule model resolution, and multiple uses of knowledge representation are included. A series of prototypes are being developed to demonstrate the feasibility of automating the process of systems engineering, design and configuration, and diagnosis and fault management. A study involves not only a generic knowledge representation; it must also support multiple views at varying levels of description and interaction between physical elements, systems, and subsystems. Moreover, it will involve models of description and explanation for each level. This multiple model feature requires the development of control methods between rule systems and heuristics on a meta-level for each expert system involved in an integrated and larger class of expert system. The broadest possible category of interacting expert systems is described along with a general methodology for the knowledge representation and control of mutually exclusive rule systems.
    Keywords: Cybernetics, Artificial Intelligence and Robotics
    Type: NASA, Marshall Space Flight Center, Second Conference on Artificial Intelligence for Space Applications; p 563-581
    Format: text
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