Results 1 to 10 of about 145 (109)
Fin control for ship roll motion stabilisation based on observer enhanced MPC with disturbance rate compensation [PDF]
Ocean Engineering, 2021 In this paper, a disturbance observer enhanced model predictive controller (MPC) which compensates for the wave-induced disturbance magnitude and rate is proposed for the ship roll motion stabilisation problem. The velocity model of the ship roll motion is used in the controller design to handle slowly varying modelling uncertainties and external ...
Geraint Paul Bevan +1 more
exaly +6 more sources
A gain scheduled control law for fin/rudder roll stabilisation of ships [PDF]
IFAC Postprint Volumes IPPV / International Federation of Automatic Control, 2004 Taking into account the variations of the environment is a means of improving performances of roll stabilisation systems. The ship behaviour is modelled as a MIMO LPV system. A methodology is presented which leads to a gain-scheduled control law. The synthesis is based on multi objective optimisation, and on the representation of the standard system as
Tanguy, Hervé, Lebret, Guy
exaly +3 more sources
The Smart Detection of Ship Severe Roll Motions and Decision-Making for Evasive Actions
Journal of Marine Science and Engineering, 2020 This paper presents a numerical model for the smart detection of synchronous and parametric roll resonance of a ship. The model implements manoeuvring equations superimposed onto ship dynamics in waves.
Maria Acanfora, Flavio Balsamo
doaj +3 more sources
Fin rudder roll stabilisation of ships: a gain scheduling control methodology [PDF]
Proceedings of the 2004 American Control Conference, 2004 Active control of ship roll is necessary for operability of an important number of ships. As such it has been strongly developed in the past twenty years. Taking into account the variations of the environment is a means of improving performances. The ship behaviour is modeled as a MIMO LPV system; a methodology is presented which leads to a gain ...
Tanguy, Hervé, Lebret, Guy
exaly +3 more sources
SLIDING MODE AND PID CONTROLLERS FOR SHIP ROLL STABILISATION: A COMPARATIVE SIMULATION STUDY [PDF]
IFAC Postprint Volumes IPPV / International Federation of Automatic Control, 2005 Abstract This paper addresses the sliding mode control design for roll reduction of a ship. The sliding mode control (SMC) technique yields the appropriate control with significant roll reduction compared with other controllers such as PID. The system comprises of three different controllers, roll-fin, roll-rudder and autopilot.
Keith J Burnham
exaly +2 more sources
Interpolated versus Polytopic Gain Scheduling Control Laws for Fin/Rudder Roll Stabilisation of Ships [PDF]
Proceedings of the 44th IEEE Conference on Decision and Control, 2006 Taking into account the variations of the environment of ships is a means of improving performances of roll stabilisation systems; this can be done through the use of gain-scheduling (GS) control law. In this study, a GS-control law is obtained by interpolation of fixed HP controllers which have been synthetized for different sailing conditions of the ...
Chéreau, Vinciane +2 more
openaire +2 more sources
IET Control Theory & Applications, 2007 The sliding mode control (SMC) design for roll reduction of a ship has been addressed. The SMC technique yields the appropriate control with significant roll reduction compared with other controllers such as proportional integrative derivative (PID). The system comprises of three different controllers, fin-roll, rudder-roll and autopilot. Consequently,
A.J. Koshkouei, K.J. Burnham, Y. Law
openaire +1 more source
Return and Volatility Spillovers Among Major Cotton Markets
Agribusiness, EarlyView.ABSTRACT This study explores return and volatility transmission among major cotton markets. Several events have disrupted cotton supply and demand in recent years, leading to heightened price volatility and significant shifts in market interconnections.
Susmitha Kalli +3 more
wiley +1 more source
Scanning Parametric Sediment Echosounder as Tool for Underwater Archaeological Prospection
Archaeological Prospection, EarlyView.ABSTRACT Underwater cultural heritage 3D prospection techniques, especially for remains that are partly buried in the ground, are only very rarely available and often can only be applied with considerable technical effort. To overcome this limitation, we evaluate a methodological adaption of widely used and available single channel parametric sediment ...
Dennis Wilken +5 more
wiley +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT Implementing digital technologies is touted as the next big step for the firms aiming to improve sustainability in their supply chains. These technologies are often credited with the potential to improve transparency and achieve sustainability.
Amna Farrukh, Aqeel Ahmed, Sadaat Yawar
wiley +1 more source