Effects of Reduced Order Modeling on the Control of a Large Space Structure

Abstract

The motion of a large space structure, such as a space station, is described by a large number of coupled, second order differential equations. To effectively control this structure, a mathematical model is required. Both the mathematical model developed directly from the physics of the structure, and the simplified model developed with modal analysis are of extremely high dimension. A reduced order model is therefore required in order to design a control system for the structure. A straightforward approach to the control problem is taken by using linear quadratic optimal control techniques to determine the reduced order control solution for the truncated modal model. The effects of reduced order modeling on the control of the space station will be evaluated by observing the response of the closed loop system to several disturbances. Keywords: Space station, Mathematical model, Modal analysis, Reduced order control, Modal analysis, Discrete time Riccati equation, Theses.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1988
Accession Number
ADA201674

Entities

People

  • William J. Preston

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Astronautics
  • Closed Loop Systems
  • Computer Programs
  • Computer Simulations
  • Computers
  • Control Systems
  • Differential Equations
  • Engineering
  • Equations
  • Equations Of Motion
  • Large Space Structures
  • Mathematical Models
  • Modal Analysis
  • Models
  • Resonant Frequency
  • Riccati Equation
  • Space Stations

Readers

  • Computational Modeling and Simulation
  • Control Systems Engineering.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers