Design of an Autonomous Stationkeeping Controller for LES-8/9.

Abstract

The report describes the design of the controller and digital filter for the LES-8/9 autonomous stationkeeping system. The design goals are to maintain a station with plus or minus 0.15 deg. accuracy with an efficient thruster fuel usage and execute automatic station changes when necessary at a controlled coasting speed. These goals are accomplished by using a time-varying eighth-and sixteenth-order filter, and a non-linear controller with switching zones. The final design is optimized taking into account stochastic nature of the navigation error. The controller parameters and filters can be altered in orbit to achieve the optimum performance for the navigation error seen in orbit. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 21, 1974
Accession Number
AD0775144

Entities

People

  • Roger W. Brockett
  • Sushanta Srivastava

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Automatic
  • Digital Filters
  • Errors
  • Filters
  • Navigation
  • Stationkeeping
  • Switching
  • Thrusters

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Control Systems Engineering.
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers