DEVELOPMENT OF A MATHEMATICAL MODEL OF A SHIP, FOR USE WITH CONTROL TECHNIQUES FOR LINEAR SYSTEMS

The work described is part of a programme of investigation being carried out at the NDPN, the centre for ship development and research in Brazil. In the study of automatic control systems for ship speed, mathematical difficulties arise because of the non-linearity of the propulsion system. One approach is to use linear control-system techniques; this necessitates a linear model that accurately represents the original system. The mathematical model of the ship, linearised for a given point of operation, gives results that differ from those of the non-linear model. The Authors present the development of linear and non-linear mathematical models for a particular ship on a straight course, together with the results obtained with them. The differences between the respective outputs allow the non-linear model to be divided into two parts, one of which is linear; the other part, with its non-linearities, is represented mathematically by a family of surfaces, which are used in making corrections. The application of the model thus developed is demonstrated by means of a simulation for a particular case. Order from BSRA as No. 49,900.

  • Supplemental Notes:
    • This paper was presented at the Congreso Iberoamericano de Ingenieria Naval, held in Madrid and Seville in May 1978.
  • Corporate Authors:

    Asociacion de Ingenieros Navales

    Apdo Correos 457
    Madrid,   Spain 
  • Authors:
    • Bianco, F A
    • Neto, O M
  • Publication Date: 1978-9

Language

  • Portuguese

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00194372
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jun 13 1979 12:00AM