Modeling of a Large Undamped Space Structure Using Time Domain Techniques

Abstract

The first phase of this project was the selection of accurate time domain state space modeling techniques by comparing the models generated by various methods, against a known system. The techniques selected were the Eigensystem Realization Algorithm and the Backward Least Squares method. These modeling techniques were applied to the vibration data from the PACOSS dynamic test article. The resulting model transfer function was then compared to the frequency response function of the actual system, and was found to be an accurate match for the system poles, but not for the system zeros. Large Space structures, Dynamic Control, System Mode Structural vibration, Flexible Spacecraft, System Identification.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1993
Accession Number
ADA273828

Entities

People

  • Anthony R. Nash

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Algorithms
  • Control Systems
  • Dynamic Tests
  • Engineering
  • Equations
  • Equations Of Motion
  • Frequency
  • Frequency Domain
  • Frequency Response
  • Least Squares Method
  • Resonant Frequency
  • Space Systems
  • Spacecraft
  • Time Domain
  • Transfer Functions
  • Vibration

Fields of Study

  • Engineering

Readers

  • Calculus or Mathematical Analysis
  • Computational Modeling and Simulation
  • Structural Dynamics.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers