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  • AIRCRAFT STABILITY AND CONTROL  (2)
  • 1
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    Single-stage electrohydraulic servosystem for actuating on airflow valve with frequencies to 500 hertz (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An airflow valve and its electrohydraulic actuation servosystem are described. The servosystem uses a high-power, single-stage servovalve to obtain a dynamic response beyond that of systems designed with conventional two-stage servovalves. The electrohydraulic servosystem is analyzed and the limitations imposed on system performance by such nonlinearities as signal saturations and power limitations are discussed. Descriptions of the mechanical design concepts and developmental considerations are included. Dynamic data, in the form of sweep-frequency test results, are presented and comparison with analytical results obtained with an analog computer model is made.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: NASA-TP-1678 , E-252
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
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    Predicting dynamic performance limits for servosystems with saturating nonlinearities (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A generalized treatment for a system with a single saturating nonlinearity is presented and compared with frequency response plots obtained from an analog model of the system. Once the amplitude dynamics are predicted with the limit lines, an iterative technique is employed to determine the system phase response. The saturation limit line technique is used in conjunction with velocity and acceleration limits to predict the performance of an electro-hydraulic servosystem containing a single-stage servovalve. Good agreement was obtained between predicted performance and experimental data.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: NASA-TP-1488 , E-9903
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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