Robust Controller Design for Flexible Structures Using Normalized Coprime Factor Plant Descriptions

Released on by National Aeronautics and Space Administration (NASA)
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  • Robust Controller Design for Flexible Structures Using Normalized Coprime Factor Plant Descriptions Book Detail

  • Author : National Aeronautics and Space Administration (NASA)
  • Release Date : 2018-07-13
  • Publisher : Createspace Independent Publishing Platform
  • Genre :
  • Pages : 76
  • ISBN 13 : 9781722724979
  • File Size : 76,76 MB
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Robust Controller Design for Flexible Structures Using Normalized Coprime Factor Plant Descriptions by National Aeronautics and Space Administration (NASA) PDF Summary

Book Description: Stabilization is a fundamental requirement in the design of feedback compensators for flexible structures. The search for the largest neighborhood around a given design plant for which a single controller produces closed-loop stability can be formulated as an H(sub infinity) control problem. The use of normalized coprime factor plant descriptions, in which the plant perturbations are defined as additive modifications to the coprime factors, leads to a closed-form expression for the maximum neighborhood boundary allowing optimal and suboptimal H(sub infinity) compensators to be computed directly without the usual gamma iteration. A summary of the theory on robust stabilization using normalized coprime factor plant descriptions is presented, and the application of the theory to the computation of robustly stable compensators for the phase version of the Control-Structures Interaction (CSI) Evolutionary Model is described. Results from the application indicate that the suboptimal version of the theory has the potential of providing the bases for the computation of low-authority compensators that are robustly stable to expected variations in design model parameters and additive unmodeled dynamics. Armstrong, Ernest S. Langley Research Center...

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