Real-time detection of transverse stability changes in fishing vessels

Caamaño, Lucía Santiago; Galeazzi, Roberto; Nielsen, Ulrik Dam; González, Marcos Míguez; Casás, Vicente Díaz

doi:10.1016/j.oceaneng.2019.106369

Cited by 18 publications

(9 citation statements)

References 37 publications

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“…Five of them focus on the transverse metacentric height (GM) as a stability measure and novel methods for GM estimation. 70–74 The largest and the most homogenous group of papers, consisting of 11 publications, relate to methods for parametric roll detection. 75–85 Another group of ten documents mainly cover studies on the complex motions of a ship, including the examination of her vulnerability to dynamic phenomena identified as dangerous.…”

Section: Resultsmentioning

confidence: 99%

“…The simplest approach 69 can be utilized only in harbor conditions to evaluate the stability conditions of a ship after cargo operations. Some significantly more advanced works achieve a robust detection of transverse stability changes in near real-time adopting signal processing methods 71 in order to estimate the natural roll frequency along with GM and their variations. To this end, a one-degree-of-freedom equation is implemented, and the roll time series are processed.…”

Section: Resultsmentioning

confidence: 99%

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

Wróbel

Gil

Krata

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part O:

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Although the safety of prospective Maritime Autonomous Surface Ships will largely depend on their ability to detect potential hazards and react to them, the contemporary scientific literature lacks the analysis of how to achieve this. This could be achieved through an application of leading safety indicators. The aim of the performed study was to identify the research directions of leading safety indicators in three safety-critical operational aspects of Maritime Autonomous Surface Ships: collision avoidance, intact stability, and communication. To achieve this, literature review is performed, taking into account scientific documents including journal and conference papers. The results indicate that the need for establishing operational leading safety indicators is recognized by numerous scholars, who sometimes make suggestions of what the set of indicators shall consist of. Some leading safety indicators for autonomous vessels are readily identifiable in the scientific literature and used in current practice. However, the research effort is lacking a holistic approach to the issue.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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

Wróbel

Gil

Krata

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part O:

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“…A key component for such a system is a monitoring and detection system, to give an early warning. Such early warning systems have already been developed for ships [51][52][53][54][55][56][57], enabling the crew to take corrective measures such as speed and/or course changes to avoid the occurrence of parametric roll. However, to date, no such early warning system has been developed for a WEC.…”

Section: Suppression Control Methods For Parametric Resonance In Wecsmentioning

confidence: 99%

A Real-Time Detection System for the Onset of Parametric Resonance in Wave Energy Converters

Davidson

Kalmár‐Nagy

2020

JMSE

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Parametric resonance is a dynamic instability due to the internal transfer of energy between degrees of freedom. Parametric resonance is known to cause large unstable pitch and/or roll motions in floating bodies, and has been observed in wave energy converters (WECs). The occurrence of parametric resonance can be highly detrimental to the performance of a WEC, since the energy in the primary mode of motion is parasitically transferred into other modes, reducing the available energy for conversion. In addition, the large unstable oscillations produce increased loading on the WEC structure and mooring system, accelerating fatigue and damage to the system. To remedy the negative effects of parametric resonance on WECs, control systems can be designed to mitigate the onset of parametric resonance. A key element of such a control system is a real-time detection system, which can provide an early warning of the likely occurrence of parametric resonance, enabling the control system sufficient time to respond and take action to avert the impending exponential increase in oscillation amplitude. This paper presents the first application of a real-time detection system for the onset of parametric resonance in WECs. The method is based on periodically assessing the stability of a mathematical model for the WEC dynamics, whose parameters are adapted online, via a recursive least squares algorithm, based on online measurements of the WEC motion. The performance of the detection system is demonstrated through a case study, considering a generic cylinder type spar-buoy, a representative of a heaving point absorber WEC, in both monochromatic and polychromatic sea states. The detection system achieved 95% accuracy across nearly 7000 sea states, producing 0.4% false negatives and 4.6% false positives. For the monochromatic waves more than 99% of the detections occurred while the pitch amplitude was less than 1/6 of its maximum amplitude, whereas for the polychromatic waves 63% of the detections occurred while the pitch amplitude was less than 1/6 of its maximum amplitude and 91% while it was less than 1/3 of its maximum amplitude.

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“…Santiago et al [27] estimated the stability of fishing vessels based on the analysis of roll motion and the mass moment of inertia. The stability monitoring system estimated the GM of fishing vessels using the measured roll angle [28]. Chen et al [29] used a machine-learning algorithm to efficiently detect the unknown parameters of a ship motion model.…”

Section: Introductionmentioning

confidence: 99%

A Methodology for Simply Evaluating the Safety of a Passenger Ship Stability Using the Index for the Intact Stability Appraisal Module

Woo

2022

Sensors

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To evaluate the safety of passenger ships’ stability, ten stability parameters should be calculated. However, since the process for calculating all stability parameters is complex without a ship loading program, a convenient methodology to simply calculate them and evaluate the safety condition of a passenger ship is required to alert the hazard to a captain, officer, and crew. The Index for Passenger Ship Intact Stability Appraisal Module (IPSAM) is proposed herein. According to the value of a passenger ship’s metacentric height (GM) which could be calculated by the ship’s roll period measured by sensors in real-time, IPSAM simply calculates nine intact stability parameters except for AnglemaxGZ and proposes the present stability status as a Single Intact Stability Index (SISI). It helps crews easily recognize the safety of passenger ships’ stability as a decision support system in real-time. Based on the intact stability parameters of 331 loading conditions of 11 passenger ships, empirical formulas for IPSAM were derived. To verify the empirical formulas of IPSAM, the stability parameters of a passenger ship in 20 loading conditions were calculated using proposed empirical formulas and the principal calculation methods respectively, then compared. Additionally, the result of the SISI of 20 loading conditions successfully indicates the danger as the value of the SISI under 1.0 of the three loading conditions that do not satisfy the IMO intact stability requirements.

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Real-time detection of transverse stability changes in fishing vessels

Cited by 18 publications

References 37 publications

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

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

A Real-Time Detection System for the Onset of Parametric Resonance in Wave Energy Converters

A Methodology for Simply Evaluating the Safety of a Passenger Ship Stability Using the Index for the Intact Stability Appraisal Module

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