Solution of the nonlinear roll model by a generalized asymptotic method

Taylan, Metin

doi:10.1016/s0029-8018(98)00064-x

Cited by 30 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7. The modified PID controller signal is demonstrated as follow: (20) Prettier form of controller can be given as follow: (21) Transfer function of closed loop system with modified PID controller is given below: (22) After one more step transfer function can be obtained: (23) As seen in above equation the system with Modified PID controller has no zeros. Its advantages are to prevent earlier peak and higher overshoot.…”

Section: Modified Pid Controllermentioning

confidence: 99%

Modified pid control design for roll fin actuator of nonlinear modelling of the fishing boat

Alarçïn

Demirel

et al. 2013

Polish Maritime Research

View full text Add to dashboard Cite

show abstract

Section: Modified Pid Controllermentioning

confidence: 99%

Modified pid control design for roll fin actuator of nonlinear modelling of the fishing boat

Alarçïn

Demirel

et al. 2013

Polish Maritime Research

View full text Add to dashboard Cite

show abstract

“…However, it is hard to obtain the exact analytical solution for the nonlinear differential equation with respect to roll response. Therefore, various approximate analytical methods have been developed for solving the nonlinear roll equation to this day, such as the multi-scale method [2], perturbation-based method [3], Krylov-Bogoliubov asymptotic method [4], and so on.…”

Section: Introductionmentioning

confidence: 99%

A Body-Nonlinear Green’s Function Method with Viscous Dissipation Effects for Large-Amplitude Roll of Floating Bodies

Guo

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

Abstract:A novel time-domain body-nonlinear Green's function method is developed for evaluating large-amplitude roll damping of two-dimensional floating bodies with consideration of viscous dissipation effects. In the method, the instantaneous wetted surface of floating bodies is accurately considered, and the viscous dissipation effects are taken into account based on the "fairly perfect fluid" model. As compared to the method based on the existing inviscid body-nonlinear Green's function, the newly proposed method can give a more accurate damping coefficient of floating bodies rolling on the free surface with large amplitudes according to the numerical tests and comparison with experimental data for a few cases related to ship hull sections with bilge keels.

show abstract

“…Sharif et al (1996) describes the final phase of full-scale sea trials utilizing the existing rudders and fins on board a frigate-sized warship, where various control strategies were employed. Taylan (1999) arrived at the solution of non-linear roll model by a generalized asymptotic method. Taylan (2000) investigated the effects of nonlinear damping and nonlinear restoring.…”

Section: Introductionmentioning

confidence: 99%

Technical note Studies on the feasibilities of control of ship roll using fins

Surendran¹,

Kiran²

2006

Ships and Offshore Structures

View full text Add to dashboard Cite

Consequences of roll motions can degrade the effective performance of a ship in a seaway. Roll motion stability becomes more critical when the moving ship encounters beam seas. Such stability is ensured using the actions of extra fins fitted to hull. Roll motion is controlled if the accelerations are high enough to cause any panicky situations for the passengers in the case of a passenger ship. Mission requirements, vessel types, loading conditions, and environmental loads cause the extent of roll and roll accelerations for a ship. In this article, the feasibility of control of roll motion using active fins is discussed. Such fins are better suited for certain types of naval ships. The stability of such vessels becomes critical during fast maneuverings and more critical in the presence of unfavorable weather conditions. Roll motion analysis on the basis of a frigate ship is performed, and proposal to reduce the roll motion using fins is also presented. Lift coefficients corresponding to various angles of attack were obtained using Fluent. Turbulence was modeled using k − ε (two-equation) model and Reynolds stress model. A number of simulations were performed for various sea conditions, and effect of ship speed on the angle of attack required for the fin to stabilize the ship was determined. Case studies were taken up with various sea states and with varying forward speeds of the ship in the beam sea.

show abstract

Solution of the nonlinear roll model by a generalized asymptotic method

Cited by 30 publications

References 3 publications

Modified pid control design for roll fin actuator of nonlinear modelling of the fishing boat

Modified pid control design for roll fin actuator of nonlinear modelling of the fishing boat

A Body-Nonlinear Green’s Function Method with Viscous Dissipation Effects for Large-Amplitude Roll of Floating Bodies

Technical note Studies on the feasibilities of control of ship roll using fins

Contact Info

Product

Resources

About