Accession Number : AD0781861

Title :   Multivariable Systems Design: A Two Ships Controller for Replenishment at Sea.

Descriptive Note : Master's thesis,


Personal Author(s) : Lima,Celso Graca

Report Date : JUN 1974

Pagination or Media Count : 129

Abstract : An investigation of the maneuvering control of two ships in the replenishment at sea operation, seen as a multivariable system, is carried out. The mathematical model of the ships motion in three degrees of freedom is established and implemented for the formation of digital computer programs and approximated for the study of steady state decoupling. Using parameter optimization techniques, the necessary control loops are designed with the aid of a digital computer. The station keeping problem of underway operation is simulated and the results compared and analyzed. (Author)

Descriptors :   *Cargo ships, *Replenishment, *Seakeeping, Logistics, Steering, Control theory, Multivariate analysis, Computer programs, Theses

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE