APPLICATION OF THE DESCRIBING FUNCTION TECHNIQUE TO NON-LINEAR ROLLING IN RANDOM WAVES

In this paper the Authors examine the nonlinear equations of ship rolling from a control engineering viewpoint by considering the ship as represented by a feedback system. This enables the describing function technique to be brought to bear on the problem. They discuss, in detail, the extension of this technique due to West and others which can account for so-called "frequency distortion of the spectrum" in nonlinear systems and point to evidence which appears to show this happening in practice. Accuracy estimates using describing function analysis are difficult to specify since they are affected by many difference factors, however they are commonly reckoned to be about 10% accurate with wideband excitation.

  • Availability:
  • Corporate Authors:

    International Periodical Press

    193 Heemraadssingel
    Rotterdam,   Netherlands 
  • Authors:
    • Flower, J O
    • Mackerdichian, S K
  • Publication Date: 1978-1

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00179196
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Aug 19 1978 12:00AM