Model Reduction Techniques Applied to the Control of Large Space Structures.

Abstract

Three model reduction techniques were examined for their applicability to large lightly damped systems. Frequency truncation, modal cost analysis, and approximate internal balancing methods are applied to the CSDL I and II models. Two actuator/sensor configurations are investigated on the CSDL I. Control of the CSDL I model is implemented through the use of the steady state optimal regulator theory, and the effect of various reduced order control models on the structure's time response is detailed. Modal cost analysis and internal balancing yield is essentially equivalent results for the cases chosen, although the internal balancing technique provides more information concerning actuator/sensor effectiveness. These methods provide more effective reduced order models for higher order systems than simple frequency truncation. Keywords include: Flexible Space Structures, Control, Model Reduction, Modal Analysis.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1984
Accession Number
ADA151784

Entities

People

  • D. W. Varhola

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Cyber
  • Sensors

DTIC Thesaurus Topics

  • Artificial Intelligence
  • Closed Loop Systems
  • Computational Science
  • Computer Programs
  • Control Systems
  • Cost Analysis
  • Engineering
  • Finite Element Analysis
  • Frequency
  • Large Space Structures
  • Mathematical Models
  • Modal Analysis
  • Molecular Orbital Theory
  • Regulators
  • Resonant Frequency
  • Space Systems
  • Steady State

Readers

  • Computational Modeling and Simulation
  • Control Systems Engineering.
  • Naval Engineering and Maritime Security

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers