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  • 1
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    An algorithm for the realization of generalized linear systems via Taylor series expansion about an arbitrary point “a” (1987)
    Elsevier
    Details
    Publication Date: 1987-01-01
    Print ISSN: 0016-0032
    Electronic ISSN: 1879-2693
    Topics: Mathematics , Technology
    Published by Elsevier
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    PAPER CURRENT
  • 2
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    Reasoning about fault diagnosis for the space station common module thermal control system (1988)
    In:  CASI
    Details
    Publication Date: 2013-08-29
    Description: The proposed common module thermal control system for the Space Station is designed to integrate thermal distribution and thermal control functions in order to transport heat and provide environmental temperature control through the common module. When the thermal system is operating in an off-normal state, due to component faults, an intelligent controller is called upon to diagnose the fault type, identify the fault location and determine the appropriate control action required to isolate the faulty component. A methodology is introduced for fault diagnosis based upon a combination of signal redundancy techniques and fuzzy logic. An expert system utilizes parity space representation and analytic redundancy to derive fault symptoms, the aggregate of which is assessed by a multivalued rule based system. A subscale laboratory model of the thermal control system designed is used as the testbed for the study.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA, Marshall Space Flight Center, Second Conference on Artificial Intelligence for Space Applications; p 403-412
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
    Electronic Resource
    Electronic Resource
    On the approximation of the magnitude response of two-dimensional IIR digital filters using linear programming (1987)
    Springer
    Circuits, systems and signal processing 6 (1987), S. 45-60 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The design of two-dimensional IIR digital filters is approached using linear-programming techniques. The problem is formulated as an approximation problem and filter frequency response characteristics are represented via the square of the magnitude of the filter transfer function. An appropriate approximation error is minimized leading to a linear problem formulation. The latter problem does not require differential correction methods for its solution, thus resulting in a computationally efficient algorithm. Stability conditions and symmetry considerations are easily accounted for. The linear programming approach assures convergence of the solution to a global minimum, among other advantages over nonlinear methods. Several examples illustrate the strength and effectiveness of the methodology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01599005
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Design and development of a new electronic sphygmomanometer (1985)
    Springer
    Medical & biological engineering & computing 23 (1985), S. 453-458 
    Details
    ISSN: 1741-0444
    Keywords: Electronic design ; Electronic sphygmomanometer ; Noninvasive blood pressure measurement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract The paper introduces a new technique for the indirect measurement of the systolic and diastolic blood pressure in humans. The technique is based upon a statistically consistent relationship between the amplitude of the pulsatile pressure waveform at the systolic and diastolic points and the amplitude of pulse signals detected when the artery is fully occluded. An adaptive measurement philosophy has been implemented in the design of an electronic sphygmomanometer which, in addition to a pressure transducer, contains suitable electronic instrumentation for processing and displaying the electronic signals. Verification of overall system accuracy is accomplished with direct comparison with manual auscultatory measurements. Clinical testing of a prototype indicates a satisfactory performance; measurement errors are maintained well within proposed standards for automated sphygmomanometers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02448933
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    Paper (German National Licenses)
    Fulltext
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