Simplified trawl system modeling and design of a depth control system using fuzzy logic

Lee, Chun‐Woo; Zhang, Chang-Ik; Shin, Hyeon–Ok

doi:10.1016/s0165-7836(00)00264-2

Cited by 23 publications

(14 citation statements)

References 5 publications

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“…27 Value comes from the consideration of statistical analysis (Figure 6(c)) and ISO 6115:1988. 11 Maximum traction will not surpass the net MBL 80% indicated by the manufacturer. Determined by statistical analysis, the average speed of load-free gear will be 1.06 m/s (average value 65 m/min).…”

Section: Proposal For Harmonising Regulations Regulatory Requirementsmentioning

confidence: 99%

Net winch design in trawlers, influence of vessel size and fishing ground

Carral

Tarrío-Saavedra

Formoso

2017

Proceedings of the Institution of Mechanical Engineers, Part M:

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With mid-depth trawling techniques, the number of fishing grounds available increases. In turn, the vessel can have a greater workload, as it has to control and direct its activity towards different species depending on the use of mid-or deep-sea equipment. However, specific equipment for each depth has to be used and this equipment influences the fishing manoeuvre. A new piece of auxiliary equipment comes into play to haul and store the net: the net winch. The aim of this study is to determine the most suitable net winch for each of the various vessels, fishing grounds and fishing modalities of the Spanish trawling fishing fleet. For each fishing ground, vessel size and target species, a relationship will be established with the net winch design parameters: fishing reel capacity, traction and operation speed.

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Section: Proposal For Harmonising Regulations Regulatory Requirementsmentioning

confidence: 99%

Net winch design in trawlers, influence of vessel size and fishing ground

Carral

Tarrío-Saavedra

Formoso

2017

Proceedings of the Institution of Mechanical Engineers, Part M:

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“…When the time t=1000 s, a disturbing force ω 0 acts on the otter board on the left side, which is removed at time t=2000s. At time t=1500 s, ω 0 acts on the trawl net, and it is removed at time t=2500 s. ω 0 is defined as 6x10 5…”

Section: Simulation Experimentsmentioning

confidence: 99%

“…In the study of control modeling, Umeda proposed a first-order simplified model to control the depth of the trawl net [3]. Lee et al presented a nonlinear trawl mathematic model, which considers the trawler, otter board and net as three material points, and all ropes are simplified as elastic links [4,5]. This nonlinear model has been employed widely.…”

Section: Introductionmentioning

confidence: 99%

A Parallel Hybrid Controller based on the Backstepping Method and S-plane Control for Three-dimensional Tracking of a Semi-pelagic Trawl System

Zhao¹,

Mao²,

Shao-hong³

2016

Open Cyber

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Aiming at improving the security of a semi-pelagic trawl in a complex working environment, this paper proposes a threedimensional tracking control system for the guidance of a semi-pelagic trawl on a complicated trajectory. The flexible nonlinear trawl system is simplified as a mass-spring-bar model. A hierarchical backstepping controller is then designed for the trajectory tracking of the trawl net and two otter boards. However, high-order state variables caused by the non-strict feedback characteristic of the trawl system appear frequently in recursive processes. Hence, a control algorithm based on the Sigmoid function is applied to construct the control outputs of these high-order variables. The stability of the proposed hybrid control method is analyzed based on the Lyapunov theorem when interference with an unknown upper limit occurs. Finally, simulation and contrast examinations show that the control algorithm is effective.

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“…Because it is operating in different fishing grounds, the fishing gear has to work in a range of depths. Depth is one of the key factors in determining the fishing method (Lee et al, 2001). It therefore makes sense to know the effect this variable has on fishing winch design.…”

Section: Introductionmentioning

confidence: 99%