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Languages : en
Pages : 0
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This paper reviews some of the most common methods of describing function development. The describing function has been used primarily for stability analysis on the Nichols, polar, and Nyquist plots. This paper shows the use of the real and imaginary components of the describing function on the parameter plane. In addition a generalized digital computer program is developed for generating describing function data for a large class of nonlinearities. Data is computed and tabulated for a number of common nonlinearities, and these tables are included as an appendix.
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Languages : en
Pages : 0
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This paper reviews some of the most common methods of describing function development. The describing function has been used primarily for stability analysis on the Nichols, polar, and Nyquist plots. This paper shows the use of the real and imaginary components of the describing function on the parameter plane. In addition a generalized digital computer program is developed for generating describing function data for a large class of nonlinearities. Data is computed and tabulated for a number of common nonlinearities, and these tables are included as an appendix.
Author: Jerry Michael Loveless
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ISBN:
Category :
Languages : en
Pages : 254
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This paper reviews some of the most common methods of describing function development. The describing function has been used primarily for stability analysis on the Nichols, polar, and Nyquist plots. This paper shows the use of the real and imaginary components of the describing function on the parameter plane. In addition a generalized digital computer program is developed for generating describing function data for a large class of nonlinearities. Data is computed and tabulated for a number of common nonlinearities, and these tables are included as an appendix.
Author: Naval Postgraduate School (U.S.)
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ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 502
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Author: Dunstan Graham
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Category :
Languages : en
Pages : 111
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Three problems were chosen so as to explore some of the apparent limitations of describing function technique for the analysis of nonlinear systems, and to show how the technique might be extended so as to overcome the indicated deficiencies. The problems were (a) the effects of stick and valve friction in fully powered, manual aircraft control systems, (b) limit cycles in satellite attitude control with off-on jets, and (c) the effects of aerodynamic hysteresis in the stability derivatives of tilt-wing VTOL aircraft. The results indicate that new describing functions can be developed as closed-loop functions provided that specific restrictions are met, that non-sinusoidal, Fourier series describing functions or a generalized periodic input describing function can be successful, but that they are extraordinarily difficult to apply, and that the aerodynamic nonlinearities which were considered are of small practical importance. (Author).
Author:
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ISBN:
Category : Science
Languages : en
Pages : 760
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 960
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
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ISBN:
Category : Science
Languages : en
Pages : 1776
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Author:
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ISBN:
Category : Human-machine systems
Languages : en
Pages : 390
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Author: Edward Shwedyk
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Category :
Languages : en
Pages : 88
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Author:
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Category : Nuclear energy
Languages : en
Pages : 1502
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