Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Relation between P-D value of Autopilot and Transfer Distance under Wind Pressure

  • Published : 2008.06.30
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Abstract

When performing steering by an autopilot (automatic steering gear), a sensitivity adjustment is mainly determined by P value and D value. These values differ in the optimal combination by model of ship and external forces. This research was carried out simulation case studies and examined movement of Pure Car Carrier, which easily received ship by wind pressure influence in low speed We investigated the relation of horizontal migration(transfer) of ship's body and P-D value. Based on it, four parameters of P-D at approaching berth could be suggested Hence there were suggestions of parameters; Distance to maximum lee point, Time to maximum lee point, Time to return to original course and Time to 300th second. The correlation of these parameters and P-D value were also considered. As a result, we think that this index, like formulated P-D, leads to an easy and safe navigation by utilizing these indices.

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References

  1. Hara, D. and Inoue, K.(2006), 'A Study on the Supporting Information in Approaching Maneuver under Wind Effect', Journal of Japan Institute of Navigation, Vol. 116, pp. 1-8
  2. Lee, Y. S.(2003), 'The Safety of Maneuverability based on the Hydrodynamic Forces Acting on Ship Hull under the Lateral Berthing', Korean Institute of Navigation and Port Research, Vol. 27, No. 6, pp. 625-630 https://doi.org/10.5394/KINPR.2003.27.6.625
  3. Lee, Y. S.(2007), 'A Study on the Effect of Wind Force and Moment Acting on T/S HANNARA', Korean Institute of Navigation and Port Research, Vol. 31, No. 3, pp. 223-228 https://doi.org/10.5394/KINPR.2007.31.3.223
  4. Sohn, K H., Kim, Y. K, Lee, S. G., and Choi, K. S.(2000), 'A Study on Course Stability of Towed Damaged Ship under Wind Pressure', Journal of the Society of Naval Architects of Korea, Vol. 37, No. 2, pp. 46-56
  5. The Society of Naval Architects of Japan(1997), 'Ship Motion and its Control at Sea', The 13th Marine Dynamics Symposium, Part 1, Japan
  6. Yamano, T. and Saito, Y.(1997), 'An Estimation Method of Wind force Acting on Ships', Journal of Kansai Soc. N. A. Japan, No. 228, pp. 123-132
  7. 本田啓之輔(2007), '操船通論', 7訂版, 成山堂