Method for estimating parameters of practical ship manoeuvring models based on the combination of RANSE computations and System Identification

Bonci, Maria Cristina; Viviani, Michele; Broglia, Riccardo; Dubbioso, Giulio

doi:10.1016/j.apor.2015.06.005

Cited by 26 publications

(7 citation statements)

References 17 publications

(21 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another method to establish the system-based mathematical model is System Identification (SI), which estimates system parameters from the time history of motion of ship obtained by free-running model tests, full-scale ship trial results, or numerical simulation. Several optimization methods for SI had been reported, both on estimation on MMG model and Abkobitz model: Kalman filter [12]; the least-square method [13,14]; support vec-tor regression [15,16,17,18]; generic algorithm [19,20], and Bayesian approach [21].…”

Section: System-based Methodsmentioning

confidence: 99%

“…Although this direct CFD method requires intense computational resources, generally, it is independent of hydrodynamic modeling except for turbulence modeling on Reynolds-averaged Navier-Stokes (RANS) equations. Numerous studies are done on direct estimation by CFD, such as turning and zig-zag motion [13,20,22,23,24,25,26,27], crush astern maneuver [28]. The direct CFD estimation is more capable of accuracy than the system-based method compared with the free-running model test [13].…”

Section: System-based Methodsmentioning

confidence: 99%

“…The authors previously used velocity component z z z(t) = (u, v m , r) T [45]. Other options are: to contain both trajectory and velocity as [19]; or use the representative value of trajectory such as tactical diameter on turning and overshoot angle on the zig-zag test as [20]. Regarding the estimation of berthing maneuver, estimation of location and velocity are both important because berthing maneuver needs to stop at the designated berthing point precisely without collision to berth wall, at zero speed.…”

Section: Objective Functionmentioning

confidence: 99%

See 2 more Smart Citations

System Parameter Exploration of Ship Maneuvering Model for Automatic Docking / Berthing using CMA-ES

Miyauchi¹,

Maki²,

Umeda³

et al. 2021

Preprint

View full text Add to dashboard Cite

Accurate maneuvering estimation is essential to establish autonomous berthing control. The system-based mathematical model is widely used to estimate the ship's maneuver. Commonly, the system parameters of the mathematical model are obtained by the captive model test (CMT), which is time-consuming to construct an accurate model suitable for complex berthing maneuvers. System identification (SI) is an alternative to constructing the mathematical model. However, SI on the mathematical model of ship's maneuver has been only conducted on much simpler maneuver: turning and zig-zag. Therefore, this study investigates the SI on a mathematical model capable of berthing maneuver. The main contributions of this study are as follows: (i) construct the system-based mathematical model on berthing by optimizing system parameters with a reduced amount of model tests than the CMT-based scheme; (ii) Find the favorable choice of objective function and type of training data for optimization. Global optimization scheme CMA-ES explored the system parameters of the MMG model from the free-running model's trajectories. The berthing simulation with the parameters obtained by the proposed method showed better agreement with the free-running model test than parameters obtained by the CMT. Furthermore, the proposed method required fewer data amounts than a CMTbased scheme.

show abstract

Section: System-based Methodsmentioning

confidence: 99%

Section: System-based Methodsmentioning

confidence: 99%

Section: Objective Functionmentioning

confidence: 99%

See 1 more Smart Citation

System Parameter Exploration of Ship Maneuvering Model for Automatic Docking / Berthing using CMA-ES

Miyauchi¹,

Maki²,

Umeda³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The CFD identification research field on ship hydrodynamics may be divided into research on inland vessels and sea ships. For the latter, [5] showed that combining System Identification with free running CFD simulations can generate relevant information, with little noise compared to EFD, to further develop the design of a vessel. Furthermore, [6] compared a CFD simulation of zigzag manoeuvres of the KCS ship with appendages in shallow water to experimental data with satisfactory results.…”

Section: Introductionmentioning

confidence: 99%

Surge Resistance Identification of Inland Vessels by Computational Fluid Dynamics

Peeters

Eggers

Boonen

et al. 2018

2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO)

View full text Add to dashboard Cite

Inland vessels play a vital role in inland freight transportation, nevertheless, they currently suffer from the competition by road and rail transport. Therefore, augmenting their motion control -with the future possibility of unmanned barges in mind -could increase their competitiveness and induce a paradigm shift in the inland freight transport sector. However, there has been relatively little analysis of the manoeuvring characteristics of small inland vessels or selfpropelled barges. Consequently, this study uses Computational Fluid Dynamics (CFD) to identify a single-variable second-order surge resistance model for a typical European Class (CEMT) type I vessel. This identification method applied the OpenFOAM software to solve the Reynolds Averaged Navier Stokes (RANS) equations by deploying a Volume of Fluid (VOF) approach and a k-omega turbulence model. This CFD methodology was first benchmarked on a KVLCC2 hull of which experimental data are publicly available to validate the CFD results. Afterwards, this validated numerical approach identified the surge model for the inland CEMT I vessel.

show abstract

“…According to Yoshimura and Sakurai (1989), hydrodynamic characteristics of a twinpropeller twin-rudder are not so much different from those of a single-propeller single-rudder ship. Quite a few studies have been done for twin-propeller twin-rudder ships (Yoshimura and Sakurai 1989;Yoo et al 2006;Kim et al 2007;Kang and Hasegawa 2007;Khanfir et al 2008Khanfir et al , 2009Tabaczek 2010;Khanfir et al 2011;Dubbioso and Viviani 2012;Coraddu et al 2013;Bonci et al 2015;Dubbioso et al 2015). Additionally, the hydrodynamic characteristics of each rudder in twinrudder configurations is also affected by the interaction between the rudders (Gim 2013;.…”

Section: Multiple Ruddersmentioning

confidence: 99%

Sixty years of research on ship rudders: effects of design choices on rudder performance

Liu

Hekkenberg

2016

Ships and Offshore Structures

View full text Add to dashboard Cite

Rudders are primary steering devices for merchant ships. The main purpose of using rudders is to generate forces for course keeping and manoeuvring. In exceptional cases, rudders are also used for emergency stopping and roll stabilisation. Furthermore, rudders affect propeller thrust efficiency and total ship resistance. Therefore, rudders are important to navigation safety and transport efficiency. The performance of rudders depends on the rudder hydrodynamic characteristics, which are affected by the design choices. Scholarly articles concerning the design of rudders date back more than 60 years. Moreover, a lot of knowledge fragments of rudders exist in literature where ship manoeuvrability and fuel consumption are discussed. It is worthwhile to gather this information not only for researchers to advance the state-of-the-art development but also for designers to make proper choices. To have a contemporary vision of the rudders, this paper presents a consolidated review of design impacts on rudder performance in ship manoeuvrability, fuel consumption, and cavitation. The discussed design choices are rudder working conditions (Reynolds numbers and angles of attack), profiles (sectional shapes), properties (area, thickness, span, chord, and rudder aspect ratios), types (the position of the stock and the structural rudder-hull connection), and interactions (among the hull, the propeller, and the rudder). Further research is suggested on high-lift rudder profiles, multiplerudder configurations and interactions among the hull, the propeller, and the rudder. Recommendations for industry practices in the selection of the rudder design choices are also given. Nomenclature Abbreviation CFD Computational Fluid Dynamics PRS Propeller-rudder systemsRe Reynolds number Greek Symbols

show abstract

Method for estimating parameters of practical ship manoeuvring models based on the combination of RANSE computations and System Identification

Cited by 26 publications

References 17 publications

System Parameter Exploration of Ship Maneuvering Model for Automatic Docking / Berthing using CMA-ES

System Parameter Exploration of Ship Maneuvering Model for Automatic Docking / Berthing using CMA-ES

Surge Resistance Identification of Inland Vessels by Computational Fluid Dynamics

Sixty years of research on ship rudders: effects of design choices on rudder performance

Contact Info

Product

Resources

About