A State-Space Model of a Large, Lightly Damped Space Structure Using the Eigensystem Realization Algorithm.

Abstract

Large, lightweight space structures of the future will require state-of-the-art vibration suppression systems. To design such a system, it is necessary to have a mathematical model that adequately describes the motion of the system. Coulomb damping compensation was utilized to remove a known nonlinearity from the frequency response functions obtained from the Passive and Active Control of Space Structures (PACOSS) Dynamic Test Article (DTA). Via the Eigensystem Realization algorithm (ERA), the frequency response functions were then used to generate a mathematical representation of the structure's dynamics. Two models were obtained. The first model, without friction compensation, acted as a baseline. The second was obtained using friction compensation. Comparing the models, it was determined that active friction compensation was worthwhile and resulted in a more accurate mathematical description of the system.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1994
Accession Number
ADA289251

Entities

People

  • Robert D. Woods

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Sensors
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Algorithms
  • Control Systems
  • Data Acquisition
  • Dynamic Tests
  • Frequency
  • Frequency Response
  • Friction
  • Large Space Structures
  • Linear Systems
  • Mathematical Models
  • Measurement
  • Models
  • Multiple Input Multiple Output
  • Solar Panels
  • Space Systems
  • Tank Guns

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Structural Dynamics.
  • Systems Analysis and Design

Technology Areas

  • Space