Wyniki wyszukiwania - Biblioteka Nauki

1

Bezzałogowe pojazdy podwodne : stan obecny, potencjał biznesowy, perspektywy rozwoju

100%

Tariov A. , Kruszko S.

Elektronika : konstrukcje, technologie, zastosowania

|

2011

|

tom Vol. 52, nr 10

148-156

PL

Jedną z najbardziej interesujących gałęzi robotyki, posiadającą ogromny potencjał biznesowy, są bezzałogowe pojazdy podwodne UUV (Unmanned Underwater Vehicle). W ciągu ostatnich trzydziestu lat stworzono ponad dziewięć tysięcy tego typu obiektów, mających zastosowanie w pracach ratunkowych, badawczych oraz militarnych. Dynamika rozwoju tej grupy pojazdów spowodowana jest w dużej mierze postępem technologicznym, jaki dokonał się na przestrzeni tych lat, zwłaszcza w dziedzinie technik telekomunikacyjnych oraz informatycznych. Ze względu na szerokie spektrum zastosowań tych obiektów warto przyjrzeć się im bliżej, ogólnym trendom oraz kierunkom rozwoju badań towarzyszącym przy ich projektowaniu, zatem celem przedstawionego artykułu jest omówienie stanu obecnego oraz perspektyw rozwoju UUV na podstawie systematyzacji wiedzy dotyczącej tej kategorii obiektów.

EN

One of the most interesting branch of robotics, which has huge business potential, are Unmanned Underwater Vehicles (UUV). Over the last thirty years more than nine thousand objects of this type have been created, applicable in rescue, research and military field. The dynamics of this vehicles' development is caused in large part by technological progress that has been made over the years, especially in the field of telecommunications and information technology. Due to the wide range of applications of these objects should look at them closely, the general trends and directions of development and research associated with their design, therefore the purpose of the article is to discuss the current situation and development prospects of UUV based on systematic knowledge about this category of objects.

2

Experimental study and numerical simulation of radiated noise from unmanned underwater vehicle

94%

Zhang C. , Xu Q. , Yang H. , Peng Z. , Li J. , Zhou J.

Polish Maritime Research

|

2024

|

tom nr 4

131--141

EN

This paper focuses on the research of the radiation noise of underwater unmanned vehicle (UUV), which is one of the most important indicators for evaluating the performance of underwater unmanned equipment. Integrating experimental study and numerical calculations, this paper investigates the underwater radiated noise characteristics and hydrodynamic properties of the propeller of UUV. Firstly, an open-water radiated noise experiment is conducted. To ensure the accuracy of acoustic test, the UUV are held stationary during the experiment. Then, the hydrodynamic performance of a propeller in a steady flow field is calculated using Computational Fluid Dynamics (CFD). Finally, the noise in the unsteady flow field is calculated using the Ffowcs Williams-Hawkings (FW-H) equation. The results show that the propeller, as the main noise source when the UUV is working, exhibits distinct characteristic line spectra in the frequency response curve. By comparing the numerical and experimental results, it was found that the overall trend of the sound pressure level is similar. But the line spectrum characteristics of the numerical results between 100 and 400 Hz are more obvious, mainly because the simulation model is more idealized compared to the experimental tests. The study further examines the hydrodynamic characteristics, propeller noise, and directional characteristics of UUV under different operating conditions.

3

Development and validation of a wave-propelled semi-submersible unmanned vehicle

71%

Tian Y. , Li W. , Wang Z.

Polish Maritime Research

|

2024

|

tom nr 4

31--42

EN

Ocean observation and exploration technologies are crucial for marine environmental protection and resource development, but traditional tools have limitations in terms of operating time, coverage, and cost. Wave gliders, which offer advantages such as long duration, wide range, and low cost, are a promising solution, but their low speed and weak manoeuvrability hinder their application, due to poor collision avoidance and survivability. This study proposes a novel wave-propelled semi-submersible unmanned vehicle (WPSUV) to overcome these disadvantages. The WPSUV features a submerged main structure for navigation and autonomous collision avoidance through rapid buoyancy adjustment. Modelling, computational hydrodynamic and motion simulations, and functional and performance testing at sea demonstrate the feasibility and superior performance of the WPSUV compared to conventional wave gliders. The proposed WPSUV significantly enhances collision avoidance through diving, reduced visual target and wind resistance with minimal structures above the waterline, and improved stability due to its lower centre of gravity. This slightly positively buoyant vehicle with a high lift-to-drag ratio can effectively harness wave kinetic energy and achieve favourable wave-following characteristics. In addition, the submerged main structure provides protection against surface hazards and allows for stealthy operation. This novel wave-propelled and near-surface unmanned underwater vehicle has the potential to revolutionise marine observation and exploration, and to enable safe, reliable, and long-term monitoring of the marine environment.

4

Projekt i wykonanie bezzałogowego pojazdu podwodnego o napędzie hybrydowym - REBA

48%

Łarzewski B. , Hałas J. , Powarzyński D. , Lewandowski J. , Piskur P.

Pomiary Automatyka Robotyka

|

2022

|

tom R. 26, nr 4

61--67

PL

W artykule przedstawiono projekt i realizację bezzałogowego pojazdu podwodnego o napędzie hybrydowym. Pojazd może być sterowany zdalnie w pozycji nawodnej, jak również posiada możliwość przemieszczenia podwodnego do wskazanego rejonu w celu przeprowadzenia rozpoznania oraz ataku poprzez detonację przenoszonego ładunku lub autodestrukcję. W artykule przedstawiono projekt i wykonanie konstrukcji mechanicznej, warstwy sprzętowej, programowej oraz wnioski wynikające ze wstępnych badań w basenie laboratoryjnym i w środowisku morskim.

EN

The article presents the design and implementation of an unmanned underwater vehicle with hybrid propulsion system. The vehicle can be controlled remotely as well as it has the ability to reach the indicated area in order to carry out reconnaissance and attack by detonating the carried load or self-destructing. The article presents both the hardware and software layers as well as the results of preliminary tests.