AN ANALYZING METHOD OF MANOEUVRABILITY WITH THE PHASE PORTRAIT

In this paper, a new method to determine the manoeuvrability of ships by using some kinds of phase portraits is introduced. When we want to determine the stability indices T1T2/K and (T1+T2)/K by Bech's method, it is necessary to assess the derivative psi=psi(d psi/d psi) with accuracy. However, it is difficult to do so because the yaw rate signal measured on the board contains many noises. On the contrary, this new method makes good use of the areas of limit cycles on the phase protraits instead of the time derivatives (psi, psi, psi) at certain instants. The validity of this method is verified by some trials on the analogue simulator. Moreover this method is applied to the analysis of the modified zigzag manoeuvres of a certain real ship and is proved to be very useful.

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  • Corporate Authors:

    Society of Naval Architects of Japan

    15-16, Toranomon, 1-chome, Minato-ku
    Tokyo,   Japan 

    Society of Naval Architects of Japan

    15-16, Toranomon, 1-chome, Minato-ku
    Tokyo,   Japan 
  • Authors:
    • Fujino, M
  • Publication Date: 1972

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Filing Info

  • Accession Number: 00323592
  • Record Type: Publication
  • Source Agency: Stevens Institute of Technology
  • Files: TRIS
  • Created Date: Nov 19 1980 12:00AM