Primary Research on the System Identification Method of Pitching Motion of Composite Trimaran

Abstract:

Abstract: The method of system identification has been initially applied in the field of the shipbuilding, especially in the application of the ship maneuverability.This article established the mathematical model of system identification of composite trimaran pitching motion model based on the genetic optimization algorithm, using VB language to write the recognition software, Design and produce a composite trimaran test model, doing the free pitching decay test ,then completing the pitching motion system identification according to the test data, and got the pitching motion equation which will be used to do the forecast ,the results of forecast can well match with the test results,confirmed the feasibility of this set of identification method, laid the foundation for other sway motion research of composite trimaran.

• Periodical: Applied Mechanics and Materials (Volumes 105-107)
• Pages: 1492-1496
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.105-107.1492
• Online since: September 2011
• Authors: Feng Zhu, Song Lin Yang, Hui Lei Li
• Keywords: Composite Trimaran, Mode of Pitching Motion, Ship Model Test, System Identification

References

[1] Y.Y. Xiao and L.P. Chen: The Algorithm and Application of Least Square Method in Limited Memory for Parameter Estimation of Systems'identification[J]. Journal of shaoguan University(Natural Science), Vol. 19 (1998) No. 6: 33-39 (In Chinese).

[2] Y. Wang, S.L. Yang and K Fan: Research on the Analysis Method of Rolling Motion of Pentamaran[C]. 2008 Conference on Ship Hydrodynamics and China Shipping Anniversary Commemoration of the Academic Community into ITTC30 Proceedings (Shanghai, China, November, 2008) (In Chinese).

[3] Y. G, Tang, Y.X. Kuang and H.X. Li: The Influence of Matecentric Height Fluctuations on Roll Motion [J]. China Shipbuilding, Vol. 49 (2008) No. 2: 22-28 (In Chinese).

[4] X.Q. Wei and L. Chen: Seakeeping Design and Analysis of Full-scale Seakeeping Test[J]. Ship Engineering, 2002. No. 3: 24-26 (In Chinese).

[5] W.P. Zhang, Z. Zong, S. L Ni and X.Y. Tang: Model Testing of Seakeeping Performance of Trimaran[J]Journal of Hydrodynamics, Vol. 22(2007) No. 5: 619-624 (In Chinese).

[6] S. Brizzolara: Hydrodynamic Optimisation of High-Speed Trimaran Hull Forms [J]. International Offshore and Polar Engineering Conference, (2008).

[7] J.P. Wu and R. K Wang: Calculation of Pitching and Heaving of a Catamaran [J] Ship & Ocean Engineering, 2003 No. 6: 16-18 (In Chinese).

[8] J. Ma, Y.T. Han, G. B, Li: Prediction of Ship Pitching Motion Based on AR Method[J]Ship Science and Technology, Vol. 28 (2006) No. 3: 28-30 (In Chinese).

[9] Z. F, Li and Y. S Yang: Simulation of the Heaving and Pitching Motion of Ship in Regular Wave [J]Journal of Dalian Maritime University. Vol. 28 (2002) No. 4: 13-16 (In Chinese).

[10] B. Ayman and Mahfouz: Identification of the Nonlinear Ship Rolling Motion Equation Using the Measured Response at Sea[J]. Ocean Engineering, Vol. 31(2004) No. 17/18: 2139-2156.

DOI: 10.1016/j.oceaneng.2004.06.001

[11] DUANW Y, HUANGDB, HUDSOND, eta1. Comparison of Two Seakeeping Prediction Methods for High Speed Multi—Hull Vessels[C]. 6th Intenrational Conferenee on Fast Sea Transportation(Southampton, UK, 2001).

DOI: 10.3940/rina.ft.2001.68

[12] BERTOER LLOC: Trimaran Model Test Results and Comparison with Different High Speed Craft [C]. PRADS(Shanghai, China, 2001).