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  • STRUCTURAL MECHANICS  (3)
  • 1
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    Distributed system modeling of a large space antenna (1983)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: A general approach for distributed parameter modeling of complex dynamical systems is described. The method consists of dividing the system in parts which can be modeled by simple partial differential equations and coupling the equations thus obtained by applying Hamilton's variational formalism to the entire system. The modeling of a large, offset-fed, wrap-rib antenna is presented to illustrate the approach. Although such models are perhaps not as precise as finite element models, they can be useful for initial physical insight and parametric design.
    Keywords: STRUCTURAL MECHANICS
    Type: Proc. of the Workshop on Appl. of Distributed System Theory to the Control of Large Space Struct.; p 89-102
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Hardware demonstration of flexible beam control (1980)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: An experiment employing a pinned-free flexible beam has been constructed to demonstrate and verify several facets of the control of flexible structures. The desired features of the experiment are to demonstrate active shape control, active dynamic control, adaptive control, various control law design approaches, and associated hardware requirements and mechanization difficulties. This paper contains the analytical work performed in support of the facility development, the final design specifications, control law synthesis, and some preliminary results.
    Keywords: STRUCTURAL MECHANICS
    Type: AIAA PAPER 80-1794 , Guidance and Control Conference; Aug 11, 1980 - Aug 13, 1980; Danvers, MA
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Local distributed estimation (1980)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Based on partial differential equations of motion the closed form solution for the optimal estimation of a spatially continuous state vector is derived, using a continuously distributed sensor. Local control is shown to be the feedback that minimizes a quadratic performance index of sensor and process disturbances. A detailed example of the control of a string in tension is presented.
    Keywords: STRUCTURAL MECHANICS
    Type: AIAA PAPER 80-1711 , Guidance and Control Conference; Aug 11, 1980 - Aug 13, 1980; Danvers, MA
    Format: text
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    NASA TECHNICAL REPORTS
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