Accession Number : ADA186303

Title :   Coordinated Steering of a Surface Ship.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Lee, Sang Sik

PDF Url : ADA186303

Report Date : Sep 1987

Pagination or Media Count : 84

Abstract : The conventional approach to ship steering is to regard the ship as a single input, single output system without cross-coupling or interaction between speed, yaw and roll. This approach has found successful application, particularly in conventional vessels where the amount of cross-coupling is normally slight. But, as a result of tight maneuvering, the modern warship suffers severe cross-coupling effects because of large control surfaces, high speed and low tonnage. Consequently, the adoption of a multivariable approach to ship steering would appear to be more suited for the design of a steering control system. This thesis describes the results of a simulation study of pre-compensator design to suppress the undesirable cross-coupling effects between speed, yaw and roll. Simulation studies using DSL and Function Minimization are the basis for accomplishing the design. Simulation results presented indicate that the adoption of a multi-input, multi-output approach would result in a significant improvement in the combined steering and stabilization problem of a warship. Keywords: Naval vessels(Combatant); Stabilization systems; Theses.

Descriptors :   *NAVAL VESSELS(COMBATANT), *STEERING, CONTROL SURFACES, CONTROL SYSTEMS, INPUT, MANEUVERABILITY, MULTIPLE OPERATION, MULTIVARIATE ANALYSIS, OCEAN SURFACE, OUTPUT, SHIPS, SIMULATION, STABILIZATION, STABILIZATION SYSTEMS, THESES, TIGHTNESS, YAW

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE