NUMERICAL SIMULATION WITH RESPECT TO NONLINEAR OPTIMAL CONTROL FOR SHIP MANOEUVRING MOTIONS

The paper gives examples of numerical solutions for the nonlinear optimal control problem for ship manoeuvring motions. The optimization is made by minimizing a performance function made up of quadratic forms. Course changing manoeuvres for a tanker using a rudder and a bow thruster as the control inputs are examined. Comparing the nonlinear optimal solutions with the linear optimal solutions, the influence of the nonlinear hydrodynamic derivatives on the characteristics of the optimal control inputs are discussed. As a result, considerable differences appear in the time to reaching the execution of rudder deflection to an opposite side and the maximum rudder angle after the opposite side deflection. It is considered that the tendency arises from the difference in the characteristics of course stability evaluated from the nonlinear equation and the linear equation.

• Supplemental Notes:
  • J Japan Inst Navigation, v 93, Sept 1995, p 163 [8 p, 10 ref, 1 tab, 7 fig]
• Authors:
  • Yumuro, A
  • MASUDA, N
  • Araki, K
• Publication Date: 1995

Language

• Japanese

Subject/Index Terms

• TRT Terms: Control; Maneuvering; Numerical analysis
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00718736
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Mar 27 1996 12:00AM