Discrete-Time Control of a Spacecraft With Retargetable Flexible Antennas

Abstract

This dissertation considers the discrete-time control of a spacecraft consisting of a rigid platform with retargetable flexible antennas. The mission consists of independent minimum-time maneuvers of each antenna to coincide with predetermined lines of sight, while the platform is stabilized in an inertial space and elastic vibration of the antennas is suppressed. The system is governed by a set of linearized time-varying equations of motion. A discrete-time approach permits consideration of the time-varying nature of the system in designing the control law. Both global and decentralized controls are proposed for a noise-free system with full-state feedback. Initially, a time-varying linear-quadratic regulator (LQR) is implemented, followed by two types of decentralized controllers.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 25, 1989
Accession Number
ADA218345

Entities

People

  • Martin E. France

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Astronautics
  • Closed Loop Systems
  • Computational Science
  • Computer Simulations
  • Differential Equations
  • Engineering
  • Equations Of Motion
  • Equations Of State
  • Feedback
  • Flexible Structures
  • Light Sources
  • Mathematical Models
  • Models
  • Optical Detectors
  • Simulations
  • Spacecraft

Fields of Study

  • Engineering

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Control Systems Engineering.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers