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Tytuł:
Dydaktyczny model pojazdu autonomicznego sterowanego znacznikami
Didactic model of autonomous vehicle controlled with markers
Autorzy:
Koziej, A.
Kułakowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/253504.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
model pojazdu autonomicznego
sterowanie znacznikami
autonomous vehicle model
control markers
Opis:
W artykule omówiony został problem konstruowania i oprogramowania dydaktycznego modelu pojazdu autonomicznego sterowanego przy pomocy znaczników. Zaprezentowano konstrukcję pojazdu. Opisano architekturę oprogramowania sterującego i rozpoznającego znaczniki, oraz problem planowania ruchu pojazdu. Przeprowadzono testy ruchowe pojazdu oraz szybkości przetwarzania informacji sterujących.
The paper presents the problem of constructing and programming an autonomous vehicle model controlled with markers. The construction of the vehicle has been presented. There has been described architecture of control and recognition marker software as well as the problem of planning the vehicle motion. There have been carried out tests of vehicle mobility and speed of control information processing.
Źródło:
TTS Technika Transportu Szynowego; 2016, 12; 375-380
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwość wykorzystania pojazdów zautomatyzowanych w celu zapewnienia wsparcia osobom niepełnoprawnym w transporcie indywidualnym
Possibility of using automated vehicles to obtain support for disabled people in individual transport
Autorzy:
Kamińska, Ewa Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/1595473.pdf
Data publikacji:
2021-02-28
Wydawca:
Polskie Wydawnictwo Ekonomiczne
Tematy:
pojazd autonomiczny
pojazd współdzielony
osoba niepełnosprawna
mobilność
autonomous vehicle model
shared vehicle
disabled people
mobility
Opis:
Celem artykułu jest przedstawienie wyników analiz dotyczących mobilności indywidualnej osób z niepełnosprawnościami w aspekcie rozwoju i wdrażania pojazdów zautomatyzowanych. Zwrócono uwagę na zagadnienia mogące w przyszłości wpływać na popularność pojazdów AV (ang. autonomous vehicles) w tej grupie odbiorców. Przeanalizowano wyniki badań dotyczących poziomu wiedzy o pojazdach AV wśród osób niepełnosprawnych, który przekłada się na chęć skorzystania z nowych form mobilności. Zwrócono również uwagę na możliwość współdzielenia przejazdów oraz na proponowane rozwiązania techniczne, które mogą ułatwić realizowanie przejazdów przez tę grupę odbiorców. Analizę przeprowadzono w odniesieniu do aktualnego stanu wiedzy z przedmiotowego zakresu. W ramach podsumowania pracy dokonano syntezy wniosków z przeprowadzonych analiz.
The aim of the article is to present the results of analyses concerning the individual mobility of people with disabilities in terms of the development and implementation of automated vehicles. Issues that may affect the popularity of AV vehicles (autonomous vehicles) for this group of recipients in the future, were highlighted. The research results analysed concerned the level of knowledge about AV vehicles among people with disabilities, which translates into the willingness to use the service. The attentions was the possibility of sharing the trips and the proposed technical solutions that may facilitate the driving by this group of recipients. The analysis was carried out in relation to the current state of knowledge in the field. As part of the summary of the work, an synthesis of the conclusions from the analyses was made.
Źródło:
Gospodarka Materiałowa i Logistyka; 2021, 2; 14-20
1231-2037
Pojawia się w:
Gospodarka Materiałowa i Logistyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model systemu detekcji przeszkód i mapowania środowiska dla autonomicznych pojazdów podwodnych
Simulation Model of Obstacle Detection and Mapping System for AUVs
Autorzy:
Kot, Rafał
Piskur, Paweł
Sigiel, Norbert
Powiązania:
https://bibliotekanauki.pl/articles/27312466.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
detekcja przeszkód
akwizycja danych
przetwarzanie zobrazowań sonarowych
autonomiczny pojazd podwodny
sonar
obstacle detection
data acquisition
sonar image processing
autonomous underwater vehicle
AUV
Opis:
W artykule przedstawiono model systemu detekcji przeszkód i mapowania środowiska, bazujący na przetwarzaniu obrazowym w czasie rzeczywistym, przeznaczony dla autonomicznego pojazdu podwodnego. Model został zrealizowany w oparciu o parametry pracy rzeczywistego sonaru z mechanicznym przestawianiem wiązki Tritech Micron Sonar. Działanie systemu detekcji zostało zweryfikowane z wykorzystaniem matematycznego modelu autonomicznego pojazdu podwodnego poruszającego się w środowisku podwodnym wyrażonym mapą testową przygotowaną na bazie rzeczywistych pomiarów zrealizowanych za pomocą ww. sonaru. Model systemu pozwala wykrywać i zapisywać w postaci mapy, przeszkody znajdujące się w polu widzenia sonaru w czasie rzeczywistym.
This article presents a real-time model of an obstacle detection and environmental mapping system based on image processing for an autonomous underwater vehicle (AUV). The model was based on Tritech Micron Sonar operating parameters with mechanical beam adjustment. The operation of the detection system was verified using a mathematical model of an autonomous underwater vehicle moving in the underwater environment, expressed by a test map prepared based on actual measurements of the above-mentioned sonar. The system model allows for detecting and mapping obstacles in the sonar’s field of view in real-time.
Źródło:
Pomiary Automatyka Robotyka; 2023, 27, 4; 19--26
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Challenges associated with the design of a small unmanned autonomous maritime vehicle
Autorzy:
Gerigk, M.
Powiązania:
https://bibliotekanauki.pl/articles/135384.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
unmanned autonomous underwater vehicle
precise position stabilization
simulation model
Opis:
The present paper begins with a presentation of an interdisciplinary research project, the method is then introduced, followed by a brief description of the unmanned autonomous maritime vehicle. The following chapter concerns a combined model describing the motion of the vehicle, including the hydrodynamic and aerodynamic forces. The model takes into account gravity, displacement, resistance, thrust, lift, and other hydrodynamic forces. The primary task of an advanced maritime vehicle is to precisely predict its position. To do so, an integrated model for the acquisition, analysis, and processing of the signals is necessary. The processed signals should then be used for the precise steering of the vehicle. The vehicle should be equipped with a stabilization system. Information on the integrated steering, positioning, and stabilization system of the vehicle is briefly presented in the paper. Such system enables to obtain a fully autonomous vehicle. Some information on the propulsion and underwater energy supply systems is also briefly presented. In the final part of the paper, some of the issues connected with vehicle safety are introduced.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 46 (118); 22-28
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametric Digital Twin of autonomous electric vehicle transmission
Autorzy:
Rjabtsikov, Viktor
Rassolkin, Anton
Kuts, Vladimir
Kudelina, Karolina
Vaimann, Toomas
Kallaste, Ants
Partyshev, Andriy
Powiązania:
https://bibliotekanauki.pl/articles/1428965.pdf
Data publikacji:
2021
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
motor drive
model-driven development
autonomous vehicle
gear
Opis:
Variable applications and methodologies are used in the Digital Twin technology. Digital Twin as a trending technology is also a general topic of many industry-oriented research projects. To develop and implement a novel technology, a detailed study of any single part of a system is required. This paper presents a development case study of the parametric Digital Twin of autonomous electric vehicle transmission. Digital Twin combines the advantages of software models and real equipment to reduce total test runs and safe maintenance. The primary duty of the Digital Twin is to allow complete synchronization and connectivity between virtual and real entities. The paper presents a detailed structural description of the virtual entity that considers the parametrization of the transmission.
Źródło:
Journal of Machine Engineering; 2021, 21, 2; 131-140
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on driving behavior decision making system of autonomous driving vehicle based on benefit evaluation model
Autorzy:
Wang, Pengwei
Gao, Song
Li, Liang
Cheng, Shuo
Zhao, Hailan
Powiązania:
https://bibliotekanauki.pl/articles/223910.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
autonomous driving vehicle
decision making model
finite state machine
lane change decision
Opis:
Autonomous driving vehicle could increase driving efficiency, reduce traffic congestion and improve driving safety, it is considered as the solution of current traffic problems. Decision making systems for autonomous driving vehicles have significant effects on driving performance. The performance of decision making system is affected by its framework and decision making model. In real traffic scenarios, the driving condition of autonomous driving vehicle faced is random and time-varying, the performance of current decision making system is unable to meet the full scene autonomous driving requirements. For autonomous driving vehicle, the division between different driving behaviors needs clear boundary conditions. Typically, in lane change scenario, multiple reasonable driving behavior choices cause conflict of driving state. The fundamental cause of conflict lies in overlapping boundary conditions. To design a decision making system for autonomous driving vehicles, firstly, based on the decomposition of human driver operation process, five basic driving behavior modes are constructed, a driving behavior decision making framework for autonomous driving vehicle based on finite state machine is proposed. Then, to achieve lane change decision making for autonomous driving vehicle, lane change behavior characteristics of human driver lane change maneuver are analyzed and extracted. Based on the analysis, multiple attributes such as driving efficiency and safety are considered, all attributes benefits are quantified and the driving behavior benefit evaluation model is established. By evaluating the benefits of all alternative driving behaviors, the optimal driving behavior for current driving scenario is output. Finally, to verify the performances of the proposed decision making model, a series of real vehicle tests are implemented in different scenarios, the real time performance, effectiveness, and feasibility performance of the proposed method is accessed. The results show that the proposed driving behavior decision making model has good feasibility, real-time performance and multi-choice filtering performance in dynamic traffic scenarios.
Źródło:
Archives of Transport; 2020, 53, 1; 21-36
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Integrated Model of Motion, Steering, Positioning and Stabilization of an Unmanned Autonomous Maritime Vehicle
Autorzy:
Gerigk, M. K.
Wójtowicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/116950.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Ship's Motion
Ship's Steering
ship's positioning
Ship's Stabilization
Unmanned Autonomous Vehicle (UAV)
Maritime UAV
Integrated Model of Motion
Steering
Positioning and Stabilization
Hydrodynamics
Opis:
In the paper the aim of an interdisciplinary research is presented. The research method is introduced. An object the unmanned autonomous maritime vehicle is briefly described. The key research problem concerns a combined model of the vehicle motion including the loads of lift and hydrodynamic nature. The model takes into account the gravity and displacement forces, resistance and thrust forces, lift and other hydrodynamic forces. One of the major research tasks is to precisely predict the position of the vehicle. To do that an integrated model of acquiring, analyzing and processing the signals is necessary. The processed signals may then be used for the precise steering of the vehicle. The vehicle should be equipped with a stabilization system. Some information on an integrated steering, positioning and stabilization system of the vehicle is briefly presented in the paper. Such the system enables to obtain a fully autonomous vehicle. Some information on the propulsion and underwater energy supply systems are presented in the paper, too.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 4; 591-596
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust model predictive control for autonomous Underwater Vehicle – Manipulator System with fuzzy compensator
Autorzy:
Esfahani, Hossein Nejatbakhsh
Powiązania:
https://bibliotekanauki.pl/articles/260317.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
UVMS
model predictive control
fuzzy compensator
Opis:
This paper proposes an improved Model Predictive Control (MPC) approach including a fuzzy compensator in order to track desired trajectories of autonomous Underwater Vehicle Manipulator Systems (UVMS). The tracking performance can be affected by robot dynamical model uncertainties and applied external disturbances. Nevertheless, the MPC as a known proficient nonlinear control approach should be improved by the uncertainty estimator and disturbance compensator particularly in high nonlinear circumstances such as underwater environment in which operation of the UVMS is extremely impressed by added nonlinear terms to its model. In this research, a new methodology is proposed to promote robustness virtue of MPC that is done by designing a fuzzy compensator based on the uncertainty and disturbance estimation in order to reduce or even omit undesired effects of these perturbations. The proposed control design is compared with conventional MPC control approach to confirm the superiority of the proposed approach in terms of robustness against uncertainties, guaranteed stability and precision.
Źródło:
Polish Maritime Research; 2019, 2; 104-114
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model Predictive Super-twisting sliding mode control for an autonomous surface vehicle
Autorzy:
Esfahani, Hossein Nejatbakhsh
Szlapczynski, Rafal
Powiązania:
https://bibliotekanauki.pl/articles/260526.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
utonomous Surface Vehicle
Model Predictive Control
Sliding Mode Control
Super-Twisting Algorithm
Chattering Attenuation
Opis:
This paper presents a new robust Model Predictive Control (MPC) algorithm for trajectory tracking of an Autonomous Surface Vehicle (ASV) in presence of the time-varying external disturbances including winds, waves and ocean currents as well as dynamical uncertainties. For fulfilling the robustness property, a sliding mode control-based procedure for designing of MPC and a super-twisting term are adopted. The MPC algorithm has been known as an effective approach for the implementation simplicity and its fast dynamic response. The proposed hybrid controller has been implemented in MATLAB / Simulink environment. The results for the combined Model Predictive Super-Twisting Sliding Mode Control (MP-STSMC) algorithm have shown that it significantly outperforms conventional MPC algorithm in terms of the transient response, robustness and steady state response and presents an effective chattering attenuation in comparison with the Super-Twisting Sliding Mode Control (STSMC) algorithm.
Źródło:
Polish Maritime Research; 2019, 3; 163-171
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method of Autonomous Vehicle Control Using Simplified Reference Models and Regulators
Metoda sterowania pojazdem autonomicznym z wykorzystaniem uproszczonych modeli referencyjnych oraz regulatorów
Autorzy:
Faryński, Jakub
Żardecki, Dariusz
Dębowski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/27314932.pdf
Data publikacji:
2023
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
mechanical engineering
autonomous vehicle
4WS vehicle
lane change process
bicycle model
inżynieria mechaniczna
pojazd autonomiczny
pojazd 4WS
zmiana pasa ruchu
model rowerowy
Opis:
This study contains a conceptual solution of the control method for an autonomous vehicle based on a simplified reference model and controllers. The whole issue is considered on the example of the execution phase of the lane change manoeuvre, in which the well-known 4WS (Four-Wheel-Steering) bicycle model and Kalman regulators based on the LQR (Linear-Quadratic Regulator) technique were used. The overall developed control mechatronic system was subjected to simulation studies in Matlab&Simulink. The simulation results showed correct functioning of the entire mechatronic control system and allowed us to determine further research directions. The developed control method can also find application in military vehicles.
Niniejsze opracowanie zawiera rozwiązanie koncepcyjne metody sterowania pojazdem autonomicznym w oparciu o uproszczony model referencyjny oraz regulatory. Całe zagadnienie jest rozważane na przykładzie fazy wykonawczej manewru zmiany pasa ruchu, w którym to wykorzystano powszechnie znany model rowerowy 4WS (Four-Wheel Steering) oraz regulatory Kalmana oparte na technice LQR (Linear-Quadratic Regulator). Całościowo opracowany mechatroniczny układ sterowania poddano badaniom symulacyjnym w programie Matlab&Simulink. Wyniki symulacji pokazały poprawne funkcjonowanie całego mechatronicznego układu regulacji oraz pozwoliły na określenie dalszych kierunków badań. Opracowana metoda sterowania może również znaleźć zastosowanie w pojazdach wojskowych.
Źródło:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2023, 14, 4 (54); 37--58
2081-5891
Pojawia się w:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A dynamic submerging motion model of the hybrid-propelled unmanned underwater vehicle: Simulation and experimental verification
Autorzy:
Talarczyk, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/11542696.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
autonomous underwater vehicle
hybrid propulsion system
biomimetic underwater vehicle
dynamic diving
diving model
autonomiczny pojazd podwodny
układ napędowy hybrydowy
biomimetyczny pojazd podwodny
nurkowanie dynamiczne
Opis:
Hybrid propulsion in underwater vehicles is the new idea of combining conventional propulsion systems such as screw propellers with other kinds of propulsion like oscillating biomimetic fins, glider wings or jet thrusters. Each of these propulsion systems has its own benefits and drawbacks, and the goal is to have them complement each other in certain conditions. This paper covers the topic of a dynamic model of the pitch and heave motion of the HUUV (hybrid unmanned underwater vehicle) using screw propellers and biomimetic lateral fins. Firstly, the simulation model of the vehicle performing depth and pitch change is presented. Secondly, the vehicle’s hydrodynamic coefficients obtained from CFD simulations are discussed. Thirdly, the results of the HUUV experimental studies in a swimming pool are presented. Lastly, simulation results are compared with those of the experiment to verify the correctness of the model. The vehicle’s motion in the swimming pool during the experiments was recorded using a submerged camcorder and then analysed using the Tracker software.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2023, 33, 2; 207--218
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential autonomous vehicle ownership growth in Hungary using the Gompertz model
Autorzy:
Alatawneh, Anas
Torok, Adam
Powiązania:
https://bibliotekanauki.pl/articles/23966951.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
autonomiczne pojazdy
Gompertz
adopcja
prognozowanie PKB
Opis:
Autonomous Vehicles (AVs) are anticipated to bring forth a multitude of advantages for upcoming mobility.These potential benefits and many others vary substantially by the market share of AVs. There are several articles that investigated AV market share with a variety of methods, however, they show a huge variation depending on the market specifications. The aim of this research is to calculate private AV adoption rates over time depending on the Hungarian automobile market characteristics. The re-search empirically estimates, using the Gompertz function, the projected growth rates of private auton-omous passenger vehicles in Hungary using historical patterns of human-driven vehicle ownership data on the basis of projected per capita GDP.The study's findings suggest that, in an optimistic and moder-ate scenario, the Hungarian car market is projected to become saturated due to AVs by 2067 and 2076, respectively. However, a pessimistic estimation indicates that saturation is unlikely to occur before 2100. This study’s contribution to the literature is through a mathematical approach that predicts AVs market penetration rate and saturation year, in which the assumptions and the used parameters of the model can be modified depending on different case studies, or they can be updated due to the advancement in technology and improvement in knowledge of the studied market.
Źródło:
Production Engineering Archives; 2023, 29, 2; 155--161
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Machine vision in autonomous vehicles: designing and testing the decision making algorithm based on entity attribute value model
Autorzy:
Shubenkova, Ksenia
Zabinski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2056098.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
autonomous driving
unmanned vehicle
machine vision
decision rules
Decision Table
Opis:
If we speak about the Smart City’s transport system, autonomous vehicles idea is the first thing that comes to mind. Today, it is strongly believed that the autonomous vehicles’ introduction into the traffic will increase the road safety. However, driverless cars are not the solution by itself. The road safety and, accordingly, sustainability will strongly depend on decision making algorithms inbuilt into the control module. Therefore, the goal of our research is to design and test the data mining algorithm based on Entity–Attribute–Value (EAV) model for decision making in the Intelligent System in the fully- or semi-autonomous vehicles. In this article, we describe the methodology to create 3 main modules of the designed Intelligent System: (1) an Object detection module; (2) a Data analysis module; (3) a Knowledge database built on decision rules generated with the help of our data mining algorithm. To build the Decision Table on the base of the real data, we have tested our algorithm on a simple collection of photos from a Polish two-lane road. Generated rules provide comparable classification results to the dynamic programming approach for optimization of decision rules relative to length or support. However, our decision making algorithm thanks to excluding the mistakes made on the object detection stage, works faster than existing ones with the same level of correctness.
Źródło:
Archiwum Motoryzacji; 2021, 94, 4; 27--37
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance investigation of hybrid photovoltaic thermal-heat with mini-channels for application in electric vehicles
Autorzy:
Strąk, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/24200857.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
mini-channels
numerical simulations
one-dimensional model
autonomous car system with PVT
vehicle battery heat exchanger
Opis:
The first autonomous car was developed in the 1980s, but it wasn't until the early 2010s that the technology began to gain significant attention and investment. In 2010, Google began testing self-driving cars on public roads, and since then, many other companies have joined the race to develop fully autonomous vehicles. Hybrid PVT (Photovoltaic Thermal) heat exchangers cooled with mini-channels find application in autonomous vehicles as a solution that enables efficient cooling of the vehicle's electronics and batteries. The solution involves using photovoltaic panels to generate electricity and removing the heat produced during the process using mini-channels is removed by mini-channels. Hybrid PVT heat exchangers cooled with mini-channels can help maintain appropriate temperatures inside autonomous vehicles that generate large amounts of heat from electronic systems and sensors. The setup can improve the performance and reliability of autonomous systems, increase energy efficiency, and reduce energy demands. The experimental setup includes two parallel mini-channel systems separated by a smooth copper plate. The study aims to determine local heat-transfer coefficients, with a cooled solar cell efficiency range of 10% to 14% compared to other research. The cooled PV temperature range achieved was from 19.6 to 22.4 degrees Celsius, which is favorable for photovoltaic panels' operation under approximate light intensity for Poland's latitude. Heat-transfer from hot surfaces to cold fluids is analyzed during single-phase convection using two calculation methods: one-dimensional and numerical simulations using Simcenter STAR CCM+. Cooling photovoltaic modules is critical for the photovoltaic and autonomous vehicle systems sector, making this research significant both theoretically and practically. The research and methods presented in the article on mini-channel cooling of photovoltaic systems and autonomous vehicle systems are innovative at a global scale, and are crucial for further development of sustainable energy systems and reduction of greenhouse gas emissions.
Źródło:
Archiwum Motoryzacji; 2023, 100, 2; 5--30
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability control of propeller Autonomous Underwater Vehicle based on combined sections method
Autorzy:
Qi, D.
Feng, J.
Liu, A.
Hu, J.
Xu, H.
Li, Y.
Ashraf, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/259119.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
propeller AUV
dynamic model
stability control
simulation
Opis:
Learning from the motion principle of quadrotor, a symmetric propeller AUV, which has small size and low velocity is designed. Compared with the AUV equipped with rudders, it has better maneuverability and manipulation at low velocity. According to the Newton-Euler method, the 6 DOF kinematic model and dynamic model of the propeller AUV are established. A stability controller that consists of 3 different PID controllers is designed. It makes the depth and attitude angle as trigger conditions, and the relevant controller is chosen in different moving process. The simulation experiments simulate ideal motion state and disturbed motion state, and experiments results show that the stability controller based on combined sections method can make the best of mature technology of PID, and meet the control requirements in different stages. It has a higher respond speed and accuracy, improving the stability of the propeller AUV under the disturbance of complex ocean currents.
Źródło:
Polish Maritime Research; 2015, S 1; 157-162
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 16

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