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1
Content available Unmanned ships – maritime transport of the 21st century
Szelangiewicz Tadeusz, Żelazny Katarzyna
Zeszyty Naukowe Akademii Morskiej w Szczecinie
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2020
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nr 64 (136)
14--21
EN
Unmanned, remotely or autonomously ships are the fastest growing new technology in maritime transport in recent years. The design of unmanned vessels envisions clean, emission-free electric propulsion. The costs of building physical models and target vessels are high, but the expected benefits are generating increasing interest in such vessels. This article presents the current state of research in the field of unmanned ships and the technical, legal and administrative problems that need to be solved in order for these ships to be used by the general public.
2
Content available Hydrodynamic characteristics of the propulsion thrusters of an unmanned ship model
Szelangiewicz Tadeusz, Żelazny Katarzyna
Zeszyty Naukowe Akademii Morskiej w Szczecinie
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2020
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nr 62 (134)
136--141
EN
In this paper, an experimental model has been developed to study an unmanned ship. Two aft azimuthal propellers and two bow tunnel thrusters were used to propel the ship. In order to develop algorithms and a computer program to control the model, it is necessary to determine the hydrodynamic characteristics of the propellers installed in the model. The propellers are very small; therefore it is impossible to use approximate methods of calculating the thrust of the ship’s propellers. The characteristics of the thrust of the propellers installed in the model were measured experimentally. This paper has given a description of the test stand and the results of the measurement of the thrust forces of the propellers installed in the model of an unmanned ship.
3
Content available Computer simulator of a model ship’s unmanned movement
Szelangiewicz Tadeusz, Żelazny Katarzyna
Zeszyty Naukowe Akademii Morskiej w Szczecinie
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2019
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nr 59 (131)
34--40
EN
As part of this research, an experimental model of an unmanned ship equipped with an ecological electric drive was built. Ultimately, the ship model was equipped with an on-board computer with appropriate software for autonomous control. A computer simulator was used to test the control software. This article presents the concept of such a simulator, a general mathematical model of the movement dynamics of an unmanned vehicle, a description of the propulsion system, and the tasks planned for implementation in a computer simulator.
4
Content available An approximate method for calculating the resistance of a transport ship model
Szelangiewicz Tadeusz, Żelazny Katarzyna
Zeszyty Naukowe Akademii Morskiej w Szczecinie
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2019
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nr 60 (132)
64--71
EN
The article presents regression formulas for calculating the friction resistance RF and the total resistance RT of ship models in the 2.0–10.0 m range. The method for calculating the total resistance is novel and applies to the design models of an unmanned surface vessel (USV) for experimental testing of autonomous control. For both regression models (RF and RT), statistical and substantive tests were performed (the results of the calculations were compared with the experimental measurements). In both cases, convincing results were obtained, which have confirmed the possibility of their use at the preliminary design stage of unmanned ship models.
5
Content available Mathematical model for calculating fuel consumption in real effect weather for a vehicle vessel
Szelangiewicz Tadeusz, Żelazny Katarzyna
Multidisciplinary Aspects of Production Engineering
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2019
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Vol. 2, Iss. 1
367--374
EN
During ship operation, one of the most important tasks is forecasting the ocean route. One of the criteria for forecasting is the minimum fuel consumption. Fuel consumption and associated emissions are also very important for other criteria. In common use, as well as in various publications, the results of calculations of fuel consumption obtained from simplified algorithms are presented. The article presents a mathematical model for calculating fuel consumption for a floating vessel in various weather conditions. In this model different criteria for controlling the propulsion engine were used by changing the fuel dose. The results of the calculations included include: fuel consumption, power of the propulsion engine and operating speed of the ship in varying weather conditions
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