Automatic Optimal Control of a Vessel with Redundant Structure of Executive Devices

Zinchenko, Serhii; Tovstokoryi, Oleh; Ben, Andrii; Nosov, Pavlo; Popovych, Ihor; Nahrybelnyi, Yaroslav

doi:10.1007/978-3-030-82014-5_18

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…The obtained result of increasing the control moment, speed of rotation and reducing the time for turning the vessel is explained by the optimization of the control moment in the redundant structure [9]. This is achieved by: using an on-board calculator; solving, at each step of the on-board computer, an optimization problem with a non-linear objective function, linear and non-linear control constraints; transfer of optimal controls to the automation of executive devices for testing.…”

Section: Resultsmentioning

confidence: 99%

Using redundant control to optimize control torque

Грицук

Nosov

Bondarchuk

et al. 2023

TAPR

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The object of research is the process of automatic control of the redundant structure of the vessel's executive devices for extreme rotation in the yaw channel. Traditionally, redundant structures have been used to improve the reliability of automated control systems and the maneuverability of vessels. At the same time, control redundancy can also be used to optimize control processes, thereby reducing fuel consumption, increasing control forces and moments, and reducing the time required to perform operations. This allows gaining advantages in movement over vessels not equipped with optimization modules. The paper considers the optimal management of the redundant structure of an offshore vessel, which ensures the rotational movement of the vessel around the center of rotation with the maximum angular velocity. As well as simultaneous maintenance of a given position or movement in the longitudinal and lateral channel, taking into account control restrictions. This problem is reduced to a nonlinear optimization problem with nonlinear and linear control constraints. The method, algorithmic and software of the module of extreme rotation of the vessel with a redundant structure of executive devices have been developed. The workability and efficiency of the developed method, algorithmic and software are verified by mathematical modeling in the closed circuit «Control Object – Control System». The results of the conducted experiment showed that the use of optimal control allows, in comparison with traditional methods of splitting controls, to increase the control moment and angular speed of rotation by 1.5–2 times. The obtained opportunities are explained by the use of a mathematical model of the redundant control structure and the optimization procedure for calculating optimal controls in the on-board computer of the automated system. The developed method can be used on vessels, provided it is integrated into the existing automated system of the on-board computer with an open architecture, to increase the capabilities of automatic traffic control.

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Section: Resultsmentioning

confidence: 99%

Using redundant control to optimize control torque

Грицук

Nosov

Bondarchuk

et al. 2023

TAPR

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“…In the course of the study, statistical data were calculated and identified, which reveal the dependence between the MMS of navigators and the sequence of their actions when performing sea maneuvers [20,21]. It should be emphasized that one of the available results was the clustering of naval teams according to typical patterns of behavior in relation to MMS.…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

Devising an approach to safety management of vessel control through the identification of navigator’s state

Nosov,

Koretsky,

Zinchenko

et al. 2023

EEJET

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The object of this study is the processes of automated management of maritime safety by analyzing the manifestations of the human factor of sea navigators. The task solved is justified by the need for formal and logical analysis and intelligent identification of mental motivational states (MMS) of marine navigators whose actions can cause dangerous situations during the control of the ship’s movement. High accident rates due to the fault of the navigators, in the absence of automated means of monitoring their condition, cause a contradiction between the existing means of safety control in controlling the movement of the vessel and the modern requirements of navigation, which needs to be resolved. A safety management approach was devised that takes into account the specificity of navigational tasks and the p-adic classification of dangerous MMS for navigators. This has made it possible to create three security modes that are activated depending on the detected state of the navigator’s MMS. Features of the results are the combination of analysis by means of p-adic systems and intelligent methods of data processing. As a result, sufficient identification accuracy was obtained for more than 75 % of MMS through neural network training. Experimental data collected during the navigation watch, as well as on the Navi Trainer 5000 navigation simulator (Wärtsilä Corporation, Finland), became the basis for simulation by means of neural networks. In turn, the training of neural networks made it possible to obtain sufficient identification accuracy by performing up to 3000 iterations. Overall, the learning rate of the neural network was 0.98, which indicates a high level of identification. From a practical point of view, the results could be used for the automated management of shipping safety, as well as for evaluating the level of adaptation of the navigator to dynamically changing conditions. The proposed approach provides opportunities for the application of modern intelligent technologies in the field of maritime transport safety, namely artificial neural network tools that determine notification modes or activation of automatic ship traffic control modules. The specified contradiction requires the design of specialized systems for automated safety management of ship traffic control based on the identified states of navigators

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Automatic Optimal Control of a Vessel with Redundant Structure of Executive Devices

Cited by 2 publications

References 21 publications

Using redundant control to optimize control torque

Using redundant control to optimize control torque

Devising an approach to safety management of vessel control through the identification of navigator’s state

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