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1
Content available Research on speed control of high speed trains based on hybrid modeling
Hou Tao, Tang Li., Niu Hong-xia, Zhao Tingyang
Archives of Transport
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2023
|
Vol. 66, iss. 2
77--82
EN
With the continuous improvement of train speed, the automatic driving of trains instead of driver driving has become the development direction of rail transit in order to realize traffic automation. The application of single modeling methods for speed control in the automatic operation of high-speed trains lacks exploration of the combination of train operation data information and physical model, resulting in low system modeling accuracy, which impacts the effectiveness of speed control and the operation of high-speed trains. To further increase the dynamic modeling accuracy of high-speed train operation and the high-speed train's speed control effect, a high-speed train speed control method based on hybrid modeling of mechanism and data drive is put forward. Firstly, a model of the high-speed train's mechanism was created by analyzing the train's dynamics. Secondly, the improved kernel-principal component regression algorithm was used to create a data-driven model using the actual operation data of the CRH3 (China Railway High-speed 3) high-speed train from Huashan North Railway Station to Xi'an North Railway Station of "Zhengxi High-speed Railway," completing the mechanism model compensation and the error correction of the speed of the actual operation process of the high-speed train, and realizing the hybrid modeling of mechanism and data-driven. Finally, the prediction Fuzzy PID control algorithm was developed based on the natural line and train characteristics to complete the train speed control simulation under the hybrid model and the mechanism model, respectively. In addition, analysis and comparison analysis were conducted. The results indicate that, compared to the high-speed train speed control based on the mechanism model, the high-speed train speed control based on hybrid modeling is more accurate, with an average speed control error reduced by 69.42%. This can effectively reduce the speed control error, improve the speed control effect and operation efficiency, and demonstrate the efficacy of the hybrid modeling and algorithm. The research results can provide a new ideal of multi-model fusion modeling for the dynamic modeling of high-speed train operation, further improve control objectives such as safety, comfort, and efficiency of high-speed train operation, and provide a reference for automatic driving and intelligent driving of high-speed trains.
2
Content available Modified Hooke-Jeeves optimization of operating parameters for required slider speeds and displacements in a feeder slider-crank mechanism
Sarigecili Mehmet Ilteris, Akcali Abrahim Deniz
Archive of Mechanical Engineering
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2023
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LXX, nr 1
63--83
EN
In such applications as in the case of feeders in which a slider-crank mechanism equipped with a rotational spring on its crank is driven by a constant force and a lumped mass at the crank-connecting rod joint center, the slider is required to take on desired speeds and displacements. For this purpose, after obtaining and solving the dynamic model of the slider-crank mechanism, the output of this model is subjected to a modified Hooke-Jeeves method resulting in the development of a procedure for the optimization of selected set of operating parameters. The basic contribution involved in the so-called Hooke-Jeeves method is the procedure by which a cost-effective advancement towards a target optimum point is accomplished in a very short time. A user-friendly interface has also been constructed to support this procedure. The optimization procedure has been illustrated on a numerical example. The validation of the resulting dynamic model has also been demonstrated.
3
Content available remote Integration of image-based fog detection with autonomous decision system for Intelligent Road Sign
Chmiel Wojciech, Derkacz Jan, Dziech Andrzej, Gozdecki Janusz, Jędrusik Stanisław, Kadłuczka Piotr, Kwiecień Joanna, Mikrut Zbigniew, Rogus Grzegorz
Journal of KONBiN
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2021
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Vol. 51, iss. 3
19--36
EN
The paper presents the description of the decision system implemented for Intelligent Road Signs. It focuses on the implementation of the novel air transparency analysis system and its integration with the rule system and the speed control infrastructure. Moreover, there are presented issues of making decisions about the content displayed in the case of autonomous and cooperating signs. To reflect more closely on real-life situations, it is assumed that the content presented by the IRS changes dynamically, depending on the road traffic and weather parameters. The IRS system operation was presented using fog detection as an example.
PL
W pracy przedstawiono oryginalny system analizy przejrzystości powietrza i metodę jego integracji z systemem regułowym inteligentnego znaku drogowego (IRS). Elementem decydującym o działaniu autonomicznego znaku oraz kooperacji grupy znaków jest zbiór reguł decyzyjnych określających treść wyświetlanych komunikatów. Dynamika rzeczywistej sytuacji drogowej wymusza zmienność treści prezentowanej przez IRS, w zależności od aktualnych parametrów ruchu drogowego lub warunków pogodowych. Działanie systemu IRS zostało zaprezentowane na przykładzie dotyczącym detekcji mgły.
4
Content available remote A new approach for control the velocity of the hydrostatic system for scissor lift with fixed displacement pump
Stawinski Lukasz, Kosucki Andrzej, Morawiec Adrian, Sikora Malgorzata
Archives of Civil and Mechanical Engineering
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2019
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Vol. 19, no. 4
1104--1115
EN
The article describes a new approach to the issue of controlling hydrostatic systems with fixed displacement pump using the frequency inverter and the simple controller unit. The aim of the article is to present a method of controlling the velocity of scissor lift drive to provide a constant velocity of the platform, regardless of its load, geometry and current location. The main feature of the proposed solution is the use of feedback in the quasi open loop from platform displacement sensor to the velocity control system of the electric motor. To ensure theThere is a possibility of using the proposed control system in a typical hydrostatic scissor lift, with added only an inverter, a platform displacement sensor and a controller to an existing machine. The proposed control strategy has been verified experimentally on an existing drive, and the obtained results show satisfactory mileages and very high accuracy of maintaining and shaping the platform velocity. The developed mathematical and physical models of the whole drive has been verified on the test bench. The conducted research gives information about new possibilities of using the inverter in hydrostatic systems, such as increasing efficiency, decreasing acceleration, decelerations , damping and improve the safety of the operation.
5
Content available Fractional order based velocity control system for a nanorobot in non-Newtonian fluids
Muresan C. I., Birs I. R., Folea S., Ionescu C.
Bulletin of the Polish Academy of Sciences. Technical Sciences
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2018
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Vol. 66, nr 6
991--997
EN
Customized patient drug delivery overcomes classic medicine setbacks such as side effects, improper drug absorption or slow action. Nanorobots can be successfully used for targeted patient-specific drug administration, but they must be reliable in the entire circulatory system environment. This paper analyzes the possibility of fractional order control applied to the nanomedicine field. The parameters of a fractional order proportional integral controller are determined with the purpose of controlling the velocity of the nanorobot in non-Newtonian fluids envisioning the blood flow in the circulatory system.
6
Content available Ewolucja mierników prędkości – od wskazówki do lasera
Dawidowski M., Kulesza-Mincer A., Owczarek W.
Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar
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2017
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nr 3-4 (18-19)
48--52
PL
Przedmiotem artykułu jest przegląd mierników prędkości, poczynając od wprowadzonego w 1906 roku sekundomierza, przez bardziej zaawansowane rozwiązanie, jak rejestrator prędkości, telemobiloskop, radar, po laser. Nakreślono pokrótce tło historyczne oraz omówiono zasady funkcjonowania poszczególnych przyrządów. W publikacji przedstawiono również obowiązujące obecnie zasady legalizacji mierników prędkości.
EN
This article contains an overview of speedometers, dating back to 1906 when a stopwatch was introduced, which led to a more advanced solution such as speed recorder, telemobiloscope, radar and finally laser. The historical background as well as the mode of operation of the individual instruments are briefly outlined. The study also outlines the current rules for the validation of speedometers.
7
Content available remote Analysis and design of photovoltaic pumping system based on nonlinear speed controller
Zebiri F., Kessal A., Rahmani L., Chebabhi A.
Journal of Power Technologies
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2016
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Vol. 96, nr 1
40--48
EN
This paper presents an analysis by which the dynamic performances of a permanent magnet brushless DC (PMBLDC) motor is controlled through a hysteresis current loop and an outer speed loop with different controllers. The dynamics of the photovoltaic pumping drive system with sliding mode speed controllers are presented. The proposed structure is comprised of a photovoltaic generator associated to a DC-DC converter controlled by fuzzy logic to ensure maximum power point tracking. The PWM signals are generated by the interaction of the motor speed closed-loop system and the current hysteresis. The motor reference current is compared with the motor speed feedback signal. The considered model has been implemented in the Matlab /Simpower environment. The results show the effectiveness of the proposed method in increasing the performance of the water pumping system.
8
Content available Odcinkowy pomiar prędkości
Jonaszek D.
Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar
|
2014
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nr 4 (7)
54--58
PL
W artykule opisano czynności wykonywane w Okręgowym Urzędzie Miar w Gdańsku, przy legalizacji pierwotnej prędkościomierzy kontrolnych pracujących w systemie odcinkowego pomiaru prędkości. Wyszczególnione zostały aktualne przepisy, obowiązujące przy legalizacji pierwotnej oraz wszystkie wymagania, jakie musi spełnić Wnioskodawca, aby legalizacja w miejscu ustawienia mogła się odbyć. Szczególną uwagę poświęcono obowiązkowi zapewnienia bezpieczeństwa w czasie i obszarze wykonywania legalizacji.
EN
The article describes the steps of initial verification of the speedometers working in the control system of segmental speed measurement. The procedure is performed by the Regional Offices of Measures in Gdańsk. There are listed the current rules applied during the initial verification and all the requirements to be met by the Applicant in order to carry out the on-site verification. Particular attention was paid to the obligation to ensure the safety of the area at the time the verification takes place.
9
IV Forum bezpieczeństwa transportu : System automatycznej kontroli prędkości - zagrożenia i nadzieje
Butler I.
Drogi : budownictwo infrastrukturalne
|
2013
|
Nr 5 (17)
46-53
10
Prędkość pojazdów w otoczeniu stacji automatycznej kontroli prędkości
Sierpiński G., Wojnar G.
Logistyka
|
2011
|
nr 3
PL
Prędkość stanowi jeden z podstawowych parametrów poruszającego się pojazdu. Dostosowanie prędkości do znaków drogowych oraz warunków aktualnie panujących na drodze ma istotny wpływ na bezpieczeństwo poruszających się pojazdem oraz znajdujących się w jego pobliżu osób. W artykule przedstawiono aktualny stan prawny dotyczący dopuszczalnych prędkości na drogach, a także limity prędkości w krajach UE. Zwrócono także uwagę na zmiany liczby zabitych w wypadkach drogowych w ostatnich latach. W drugiej części przedstawiono analizy prędkości pojazdów w otoczeniu stacji automatycznej kontroli prędkości.
EN
Speed is a one of general parameters of moving vehicle. Speed adaptation to road sings and currently road conditions has a real influence on safety of a driver and other people in surroundings. The article includes a review of the speed limits in European Union countries. The changes of road accidents and fatalities in last years was also shown. The results of observation and analysis of vehicles speed in surroundings of position of automatic speed control was described in second part of the article.
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