YAWING OF A SHIP STEERED BY AN AUTOMATIC PILOT IN ROUGH SEAS

This paper is concerned with the non-linear characteristics of an auto-pilot in improving the stability of ships in following seas. The theory is developed for optimizing the auto-pilot, accounting for the non-linearities introduced by limitations on rudder angle and rudder angular velocity. The yaw and rudder angles are assumed to be stationary random processes, and the Wiener-Hopf integral is used to obtain the transfer function relating them in a system of waves, hence yielding the optimum rudder behaviour. For given auto-pilot characteristics, it is shown how root-mean-square yaw angles may be estimated for a ship in a given course in a known sea state.

• Corporate Authors:

  Institution of Mechanical Engineers

  1 Birdcage Walk
  London SW1H 9JJ,   England 
• Authors:
  • Afremoff, A S
  • Nikolaev, E P
• Publication Date: 1972

Media Info

• Pagination: n.p.
• Serial:
  • Journal of Mechanical Engineering Science
  • Volume: 14
  • Issue Number: 7
  • Publisher: Mechanical Engineering Publications Limited

Subject/Index Terms

• TRT Terms: Automatic pilot (Aircraft); Automatic pilot (Ships); Oscillation; Rudders; Ship motion; Stability (Mechanics); Steering systems; Yaw; Yaw
• Old TRIS Terms: Rudder oscillation; Ship stability
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00323502
• Record Type: Publication
• Source Agency: Stevens Institute of Technology
• Files: TRIS
• Created Date: Nov 29 1980 12:00AM