Surface Ship Fuel Savings with an Optimized Autopilot

Abstract

In this thesis, the propulsion losses, which are caused by added drag due to steering of the ship, can be minimized by using an Adaptive Automatic Optimal Controller. It is shown in this thesis that an Adaptive Automatic Optimal Controller is capable of providing fuel savings in excess of 0.5% over a well tuned PID controller when operating at the design speed at random headings in sea states. A new approach was used in finding fuel savings without using the engine specifications. It is shown that the second-order forces and moments create drift motions along the surge, sway, and yaw axes. As a consequence of this, the second-order forces and moments cause more fuel consumption than the first-order forces and moments cause more fuel consumption than the first-order forces and moments, which create only oscillatory ship motions along this axis. So the sea state in the deterministic model is represented by the first-order and second-order forces and moments. Keywords: Cost Function; Function Minimization Subroutine BOXPLX.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1985
Accession Number
ADA164216

Entities

People

  • Volkan Akinsal

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Angular Motion
  • Classification
  • Computer Programming
  • Computer Programs
  • Computer Simulations
  • Computers
  • Control Systems
  • Dynamic Response
  • Engineering
  • Equations Of Motion
  • Fuel Consumption
  • Schools
  • Specifications
  • Standards
  • Steady State
  • Surfaces
  • Systems Engineering

Readers

  • Control Systems Engineering.
  • Robotics and Automation.