Motion control of a cruise ship by using active stabilizing fins

The present study considers the motion control of a cruise ship by using active stabilizing fins. One or two pairs of stabilizing fins are equipped to reduce the roll and/or pitch motions of the cruise ship. Each fin is controlled by algorithms based on proportional-integral-derivative (PID) and linear quadratic Gaussian (LQG) control. Numerical analysis of the wave-induced motion of a cruise ship with stabilizing fins is carried out by using the time-domain ship motion program which has been developed through this study. The resultant motion response as the performance of each controller is compared between different control algorithms. Based on the present simulation results, the stabilizing fin can be considered a good instrument to reduce pitch motion as well as roll motion of the present cruise ship model. The present results show that the PID control algorithm, a simple but practical algorithm, can be an appropriate method to reduce the roll motion in a moderate sea state, while the LQG control algorithm shows good performance in reducing not only the roll motion but also the coupled roll and pitch motions simultaneously in all of environmental conditions considered.Bai J, 2010, SHIPS OFFSHORE STRUC, V5, P189, DOI 10.1080/17445300903354224KIM JH, 2010, STUDY LINEAR SEAKEEPKIM Y, 2010, P ITTC SEAK WORKSH S, P114Perez T, 2008, CONTROL ENG PRACT, V16, P482, DOI 10.1016/j.conengprac.2006.02.016KIM KH, 2008, WISH JIP PHASE 1 PROROBERTS GN, 2006, P I MECH ENG M-J ENG, V220, P53, DOI 10.1243/14750902JEME57PEREZ T, 2005, SHIP MOTION CONTROLKim SH, 2004, OCEAN ENG, V31, P523, DOI 10.1016/j.oceaneng.2003.10.003LIUT D, 2001, INT SHIPBLDG PROG, V48, P19LIUT D, 1999, THESIS VIRGINIA POLYWU TN, 1999, J MARINE SCI TECHNOL, V4, P117Payne PR, 1997, OCEAN ENG, V24, P235Sharif MT, 1996, CONTROL ENG PRACT, V4, P377SHARIF MT, 1995, CONTROL ENG PRACT, V3, P703FRANKLIN GF, 1995, FEEDBACK CONTROL DYNFOSSEN T, 1994, GUIDANCE CONTROL OCEANDERSON B, 1989, OPTIMAL CONTROL LINELLOYD AR, 1989, SEAKEEPING SHIP BEHABHATTACHARYYA R, 1978, DYNAMICS MARINE VEHI*GRUMM AER CORP, 1978, 611404379 NAVSEC GRUKALMAN RE, 1960, J BASIC ENG, V82, P35, DOI DOI 10.1109/ICASSP.1982.1171734ABKOWITZ MA, 1959, T SNAME, V67, P210STEFUN GP, 1959, J SHIP RES, V3, P15ALLAN JF, 1945, T ROYAL I NAVAL ARCH, V87, P123