The Smart Detection of Ship Severe Roll Motions and Decision-Making for Evasive Actions

Abstract

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. It also features suited autopilot and rudder actuator models, aiming at a fair depiction of the control delay. The developed method is able to identify and distinguish between synchronous and parametric roll resonance, based on the estimation of encounter wave period from ship motions. Therefore, it could be useful as a smart tool for manned vessels and, also, in the perspective of unmanned and autonomous vessels (in the paper it is assumed a hypothetical remote crew). Once the resonance threat is identified, different evasive actions are simulated and compared, based on course and speed change. Calculations are carried out on a ro-ro pax vessel vulnerable to parametric roll. We conclude that, in roll resonance situations, and in the absence of roll stabilisation systems on-board, course change could be the most effective countermeasure.

Simulation Modeling of a Ship Propulsion System in Waves for Control Purposes

“…Differently from [47], implemented in FORTRAN, the model adopted herein is developed and implemented in MATLAB/Simulink [49,50]. Similar to [47,51,52], it allows for the estimation of ship dynamic instabilities and maneuvering simulations in irregular waves with a fair level of accuracy.…”

On the use of leading safety indicators in maritime and their feasibility for Maritime Autonomous Surface Ships

“…Bearing in mind the discussed limitations, such an approach currently seems to remain the best achievable option. However, the need for further development 130 and practical testing of the proposed solutions is indisputable. The very concept of stability criteria is based on measuring physical phenomena and confronting them with experience-based thresholds.…”

Construction Method of Unmanned Surface Vehicles Power Control Platform Based on Environmental Force Feedback

“…Acanfora M et al proposed a numerical model of synchronous and parametric roll resonance intelligent detection of ships for the severe roll motion of ships. In the face of maritime threats, different evading actions will be simulated and compared according to the change of course and speed, and finally the course will be changed [10] . Song L et al proposed an emergency collision avoidance algorithm for USV based on motion ability database for the dynamic obstacle avoidance of USV during the task, and the effectiveness of the algorithm was demonstrated by simulating the emergency avoidance experiment [11] .…”