Optimization of Guidance and Control Using Function Minimization and NAVSTAR/GPS.

Abstract

A carefully designed controller, tuned to minimize a performance criterion based on representation of the added drag due to steering, can minimize propulsion losses. A computer simulation modeling the Sea-Land McLean (SL-7) containership was coupled to a function minimization subroutine and a sea-state generator subroutine to accomplish the tuning. Storing these optimal control parameters in a look up table as functions of ship state, sea state, and encounter angle, this technique can be used as an adaptive controller. Satellite platforms can give continuous environmental operating conditions which may used to select proper controller parameters to provide continuous operation on a minimum of the cost function. The SL-7 containership on a minimum of the cost function. The SL-7 containerhsip computer model was tested in calm waters and in seaway. Originator-supplied keywords include: Optimization, Performance criterion, Nomoto, Taylor's series, Function minimization subroutine, NAVSTAR/GPS, Space transportation system (STS), Sea-Land Mclean.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1984
Accession Number
ADA149956

Entities

People

  • V. C. Garcia Jr

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Artificial Satellites
  • Computer Programming
  • Computer Programs
  • Computer Simulations
  • Computers
  • Containerships
  • Control Systems
  • Electrical Engineering
  • Engineering
  • Equations Of Motion
  • Linear Programming
  • Procedures (Computers)
  • Ship Models
  • Simulations
  • Systems Engineering
  • United States

Readers

  • Computer Science.
  • Control Systems Engineering.
  • Marine Hydrodynamics

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers