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    Modelling issues of the SCOLE control problem (1984)
    In:  CASI
    Details
    Publication Date: 2004-12-04
    Description: Nonlinear and linear equations of motions were derived. The preliminary investigation consisted of model beam as truss structure, effects of truss structure on control design, and effects of reflector offset on control design. It was concluded that the offset of the reflector c.g. from the beam reflector attach point is dynamically significant. Also, truss effects may also significantly effect the performance of the controller if ignored. If the truss is included in the modeling of the NASA/SCOLE configuration, a practically implementable scheme is available to reduce the model order.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA. Langley Research Center, Spacecraft Control Laboratory Experiment (SCOLE) Workshop, 1984; p 133-147
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Multivariable control of a soft coupled space station (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The paper discusses a multivariate controller design for a control configured space station concept. The space station concept is novel in that mechanical filters (soft couplers) are used to reduce structural interaction between adjacent modules. The primary objective of this study is to provide stability augmentation to the soft coupled configuration. The control objective is achieved by a state feedback compensator design. To obtain the desired feedback gains, a modified LQR technique is developed which provides prescribed close-loop frequencies and damping ratios.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: JPL Proc. of the Workshop on Identification and Control of Flexible Space Struct., Vol. 1; p 37-50
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Linearized dynamical model for the NASA/IEEE SCOLE configuration (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The linearized equation of motion for the NASA/IEEE SCOLE configuration are developed. The derivation is based on the method of Lagrange and the equations are assembled into matrix second order form.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-CR-172394 , NAS 1.26:172394
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Multivariable control of a soft coupled space station (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The paper discusses a multivariable controller design for a control configured space station concept. The space station concept is novel in that mechanical filters (soft couplers) are used to reduce structural interaction between adjacent modules. The primary objective of this study is to provide stability augmentation to the soft coupled configuration. The control objective is achieved by a state feedback compensator design. To obtain the desired feedback gains, a modified LQR technique is developed which provides prescribed close-loop frequencies and damping ratios.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 84-1920
    Format: text
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    NASA TECHNICAL REPORTS
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