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Wyświetlanie 1-10 z 10
Tytuł:
How to do it with sticky notes: a method for exploring expert knowledge to prepare guidelines for practice in railway vehicle maintenance
Autorzy:
Smoczyński, Piotr
Gill, Adrian
Motyl, Mateusz
Babiak, Artur
Powiązania:
https://bibliotekanauki.pl/articles/2203855.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
safety management
railway maintenance
user stories
safeworking rules
zarządzanie bezpieczeństwem
utrzymanie kolei
historie użytkowników
zasady bezpieczeństwa pracy
Opis:
The process of describing human activities in procedures has been used since the beginning of the 20th century. However, it is increasingly evident that procedures understood as sets of orders and prohibitions can be counter-productive because they do not allow the proper use of employees’ knowledge and experience. Therefore, it is postulated that guidelines for practice should be co-developed by employees from the ‘sharp end’ of the organization, but there are no simple methods that can achieve this aim. In the present work, we propose a procedure based on sticky notes, inspired by how information technology teams function. We present a description of the original sticky notes method (SNM) and demonstrate its application in the railway sector. As a result of the workshops conducted with the participation of experts, we gained knowledge about practices that were not included in the documentation, but that could significantly improve the process under research. The primary purpose of the SNM is to ensure the involvement of employees in the process of creating guidelines for practice. This method is particularly useful for describing linear processes in which activities can be arranged chronologically.
Źródło:
Transport Problems; 2021, 16, 1; 153--164
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Logistical Problems in the Field of Railway Tracks Modernization and Maintenance Technology
Autorzy:
Surowiecki, Andrzej
Zieliński, Michał
Winiarski, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/504272.pdf
Data publikacji:
2016
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
modernization and maintenance of railway tracks
overhaul technologies
logistics
Opis:
The study presents the organization, mechanization and technology in the field of modernization and maintenance of Polish National Railway (PKP) lines, as well as in relation to the activities of the DOLKOM- Wroclaw company. Attention has been drawn to the major overhaul technology (resurfacing), the exchange of switches, surface maintenance and repair of the rail-bed (subgrade). The technological requirements, regarding the renovation and modernization of surface and rail-bed in the PKP railway network, have been discussed. In the field of rail-bed renovation, attention has been focused on the process of technological modernization of the track using a specialized multifunctional machine AHM-800R.
Źródło:
Logistics and Transport; 2016, 32, 4; 89-96
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness assessment of diesel locomotives operation with the use of mobile maintenance points
Autorzy:
Szkoda, Maciej
Satora, Magdalena
Konieczek, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/949849.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
railway vehicles
maintenance strategy
mobile maintenance points
pojazdy kolejowe
konserwacja
mobilny punkt serwisowy
Opis:
Based on the example of 6Dg type diesel locomotives, the paper presents a new maintenance strategy concerning periodical checks at the P1 maintenance level. Currently, such locomotives are sent off to service points every 102 hours of operation or every 14 days for a P1 level check. Studies demonstrate that the average distance to be covered by a locomotive to arrive at a service point is in excess of 60.0 km, and the quantity of fuel consumed is more than 88 litres. It is costly and time consuming to have locomotives out of service and considerable resources of the railway carrier are engaged which could be made use of in the transport process. The aim of the newly developed strategy of P1 checks is to eliminate the need for locomotives to exit their routes to reach rolling stock maintenance points. The control/diagnostic and maintenance activities specified in the Maintenance System Documentation will be performed by socalled mobile maintenance points. The development of the new strategy required: identification of the current condition of the maintenance system, development of the concept of a new strategy of P1 maintenance checks, conduct of studies and operational analyses for SM42 series locomotives, performance of a durability, reliability analysis, assessment of safety together with an analysis of the risks involved in the proposed changes. In order to review and assess the efficiency of the new strategy, an observed operation of selected locomotives was conducted together with a railway carrier. During the study, the maintenance activities and processes were monitored and the costs of P1 checks were recorded. The analysis of efficiency of the new strategy of performing P1 checks without the need for a locomotive to exit its route to reach a rolling stock maintenance point demonstrated that depending on the distance covered by the locomotive to reach a maintenance point, the unit costs of a P1 level check are lower by up to 67.1% compared with the currently applied method.
Źródło:
Archives of Transport; 2020, 54, 2; 7-19
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Truck Maintenance Allocation Scheme Based on SA-GA
Autorzy:
Qiu, Jiandong
Ren, Wei
Tang, Minan
Ma, Panpan
Zhang, Yang
Powiązania:
https://bibliotekanauki.pl/articles/2173924.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
railway transportation
train-line
train depot
maintenance of railway trucks
renovations
repair schedule
SA-GA
transport kolejowy
linia kolejowa
zajezdnia kolejowa
konserwacja taboru kolejowego
prace remontowe
harmonogram remontów
Opis:
As an important department of railway transportation and production, large freight train depot is responsible for the regular overhaul and maintenance of railway trucks. The shunting operation of freight train depot covers the whole process of railway trucks entering, storing, overhauling and leaving the depot. It is an important step in the implementation of the maintenance operation. Usually, shunting personnel in the depot transport the trucks to be overhauled to the maintenance line by relying on the shunting operation plan, which is the key to determine the shunting operation plan according to the distribution relationship between vehicles and maintenance. Firstly, this paper analyzes the process of centralized shunting operation in the freight train depot and the factors affecting the time-consuming based on the research idea of flexible workshop scheduling problem. Then, on the premise that the proportion of the weight coefficient will have an impact on the time-consuming of truck busy and shunting in the shunting process, and with the goal of minimizing the time-consuming of truck maintenance busy and shunting, the allocation model between trucks and maintenance lines is established; In addition, an improved genetic algorithm is proposed to solve the established model; Finally, combined with the maintenance of railway trucks in a large freight train depot, an example analysis is carried out on this basis. The results demonstrate that using simulated annealing genetic algorithm to solve the model can obtain the allocation scheme between railway trucks and maintenance operation line. Under the influence of three different coefficients, compared with genetic algorithm, simulated annealing genetic algorithm can reduce the detention time of railway trucks in depot by 0.21%, 0.09% and 0.12% respectively, which is beneficial to reducing the detention time of maintenance vehicles in depot, It plays a positive role in improving the maintenance efficiency of trucks in the depot, and also provides new ideas for the research of railway truck shunting
Źródło:
Archives of Transport; 2022, 62, 2; 59--71
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in maintenance of railway vehicles as the sources of threats in the railway system
Zmiany w utrzymaniu pojazdów kolejowych źródłami zagrożeń w systemie kolejowym
Autorzy:
Helak, Magdalena
Kadziński, Adam
Powiązania:
https://bibliotekanauki.pl/articles/30145373.pdf
Data publikacji:
2020
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
railway vehicles
sources of threats
maintenance system
railway system
pojazdy kolejowe
źródła zagrożeń
system utrzymania
system kolejowy
Opis:
Proper operation of railway vehicles is the basis for the functioning of a safe railway system. At the same time, it is not possible to talk about the safe use of a vehicle without adequately carried out maintenance processes. Due to legislative changes in August 2017, the maintenance system of railway vehicles has changed significantly. In most cases, it is the entities responsible for maintenance that are fully liable for the shape of the maintenance documentation, not the national security authority (in Poland the President of the Rail Transport Office) as has been the case so far. That is a big challenge for everyone involved in maintaining railway vehicles. The article presents the system of maintenance of railway vehicles as critical for the railway system safety, with the division into those registered in the National Railway Register and the unregistered ones. National and EU requirements for maintenance systems as well as the conditions for the implementation of "changes" in these systems have been presented, based, among others, on the results of the risk assessment of the threats they generate.
Prawidłowa eksploatacja pojazdów kolejowych jest podstawą funkcjonowania bezpiecznego systemu kolejowego. Jednocześnie nie można mówić o bezpiecznym użytkowaniu pojazdu bez prawidłowego przeprowadzenia procesów utrzymaniowych W związku ze zmianami legislacyjnymi w sierpniu 2017 r. system utrzymania pojazdów kolejowych uległ istotnym zmianom. W większości przypadków to na podmiotach odpowiedzialnych za utrzymanie spoczęła pełna odpowiedzialność za kształt dokumentacji utrzymaniowej, nie zaś na krajowej władzy bezpieczeństwa (w przypadku Polski na Prezesie Urzędu Transportu Kolejowego), jak było do tej pory. To duże wyzwanie dla wszystkich zajmujących się utrzymywaniem pojazdów kolejowych. Artykuł przedstawia krytyczny dla bezpieczeństwa systemu kolejowego system utrzymania pojazdów kolejowych, z podziałem na pojazdy zarejestrowane w Krajowym Rejestrze Pojazdów Kolejowych i niezarejestrowane. Zaprezentowano wymagania krajowe i unijne dla systemów utrzymania, jak również warunki wdrażania „zmian” w tych systemach, oparte m.in. na wynikach oceny ryzyka generowanych przez nie zagrożeń.
Źródło:
Scientific Journal of the Military University of Land Forces; 2020, 52, 1(195); 112-120
2544-7122
2545-0719
Pojawia się w:
Scientific Journal of the Military University of Land Forces
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary study of shaping the railway track geometry in terms of their maintenance costs and capacity
Autorzy:
Gołębiowski, Piotr
Kukulski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/223617.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
railway infrastructure
maintenance cost
capacity
rail durability
infrastruktura kolejowa
koszty utrzymania
pojemność
trwałość szyn
Opis:
In Poland, due to the increase in investments made by railways in recent years, and thus the increase in the replacement value of transport infrastructure, the need for expenditure on infrastructure maintenance will increase in the next 30 years, or the development of the developed transport network will degrade. As part of the overall discipline of resource management, subdiscipline has emerged - infrastructure asset management. As part of the management of railway transport infrastructure, the demand for cheaper maintenance costs will grow. The cost reduction of infrastructure maintenance is possible through meticulous assessment of its condition, rational selection of locations and scope of repairs at the assumed risk level, as well as at the stage of preparation of new construction or modernization projects taking into account aspects of later maintenance. For some time, we have been observing the accumulation of knowledge (methods, programs, procedures) in the country and abroad enabling optimization of infrastructure condition assessment and programming of its maintenance. The implementation of these solutions may result in a more rational use of funds for infrastructure maintenance and not disturb its smooth functioning in operation. The article discusses aspects that should be considered in the design process of railway infrastructure. Particular attention was paid to the durability of steel components of the railway superstructure, maintenance costs as well as aspects related to the capacity of the track node. An example of dependence of selected values of radial arcs depending on their durability and maintenance costs was presented. It was proposed to change the track layout at the Warszawa Srodmiescie passenger stop planned for reconstruction. Calculations of kinematic parameters for various configurations of railway turnouts were performed. Also, calculations of the capacity for the existing track system solution as well as the proposed track system after reconstruction of the analysed Warszawa Srodmiescie railway station were also carried out.
Źródło:
Archives of Transport; 2020, 53, 1; 115-128
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of artificial neural networks to predict railway switch durability
Autorzy:
Gibała, Ł.
Konieczny, J.
Powiązania:
https://bibliotekanauki.pl/articles/197192.pdf
Data publikacji:
2018
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
artificial neural networks
railway switch
maintenance
prediction
sztuczne sieci neuronowe
rozjazd szynowy
konserwacja
prognoza
Opis:
The article presents the possibility of applying artificial intelligence to forecast necessary repairs on ordinary railway switches. Railway switch data from Katowice and Katowice Szopienice Północne Stations were used to model neural structures. Using the prepared data set (changes in values of nominal dimensions in characteristic sections of 15 railway switches), we created three variants of railway switch classifications. Then, with the results, we determined the values of classifiers and the low mean absolute error, as well as compared charts of effectivity. It was calculated that the best solution by which to evaluate necessary repairs in railway switches was, in part, to repair the crossing nose. It was assessed that a structure with single output data was more effective for the accepted data.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2018, 101; 67-77
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The method for increasing the efficiency of equipment’s maintenance in railway traction power supply systems
Autorzy:
Matusevych, O.
Kuznetsov, V.
Sychenko, V.
Powiązania:
https://bibliotekanauki.pl/articles/223664.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
railway traction
power systems
efficiency
maintenance equipments
traction substation
trakcja kolejowa
systemy zasilania
wydajność
konserwacja urządzeń
Opis:
Purpose. To develop the method for increasing the efficiency of the equipment’s maintenance and repair system, ensuring necessary level of operational reliability of the equipment, safety and reliability of the electric equipment with minimal expenses on operation. Relevance. Aging of the power equipment in railway power supply systems sharply raised a need for assessment of its states and degree of risk for operation outside rated service life. In critical conditions of technological processes and operational modes of the railways it is necessary to increase the equipment’s operational reliability. The scheduled maintenance and repair system whose main technical and economic criterion is the minimum of equipment’s downtimes on the basis of a rigid regulation of repair cycles, in the conditions of market regulations in the field of repair in many cases does not provide the optimal decisions due to insufficient financing. The solution of this problem is possible by improvement of the maintenance and repair system. Under these conditions the main direction for supporting the operational reliability of power electric equipment on TS is a development of the modern methods based on individual supervision over real changes of technical condition of power equipment. Scientific novelty. In this article the authors proposed an integrated approach, on the basis of which can be developed the effective maintenance and repair system for traction power supply systems. Proposed approach allowed to react quickly to changes of service conditions on traction substations, to control the technical condition of power electric equipment under the conditions of uncertainty, to establish interrelation between quality of service and operational reliability of the equipment, to choose a service strategy on traction substations. Practical importance. The validity of the developed method was confirmed by the results of calculations and practically by choosing the optimal maintenance's option for transformer TDTN-25000/150-70 U1 (ТДТН-25000/150-70 У1) on traction power supply substation.
Źródło:
Archives of Transport; 2018, 47, 3; 39-47
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of railway system maintenance and availability by means of Colored Petri nets
Modelowanie utrzymania ruchu i gotowości systemu kolejowego za pomocą kolorowych sieci Petriego
Autorzy:
Song, H.
Schnieder, E.
Powiązania:
https://bibliotekanauki.pl/articles/300762.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
prognostics and health management
colored Petri nets
railway system
maintenance
availability
prognostyka i zarządzanie zdrowiem
kolorowe sieci Petriego
system kolejowy
utrzymanie ruchu
gotowość
Opis:
Prognostics and health management (PHM) technologies permit actionable information to enable proper decision-making for improving systems’ performance. With the increasing requirements placed on the rail systems’ availability, better maintenance decisions should be evaluated before practical application. The aim of this work is to build maintenance models and estimate the performance of considered maintenance decisions regarding the rail system’s reliability and availability by means of Colored Petri nets. As a high-level formalization method, Colored Petri nets provide different color sets, which are suitable to represent different maintenance attributions. The maintenance models are evaluated at both the structure and parameterization levels. At the structure level, the structure correctness of the maintenance models is evaluated by using the state space analysis. At the parameterization level, specific maintenance decisions are illustrated. With various maintenance parameters, comparisons of system reliability and availability are made with the results obtained with the Colored Petri nets model.
Technologie prognostyki i zarządzania zdrowiem (PHM) dostarczają praktycznych danych, które umożliwiają podejmowanie właściwych decyzji w zakresie poprawy wydajności systemów. Wraz z rosnącymi wymaganiami dotyczącymi gotowości systemów kolejowych, rośnie potrzeba oceny decyzji dotyczących utrzymania ruchu przed ich wprowadzeniem w życie. Celem przedstawionej pracy było zbudowanie modeli utrzymania ruchu oraz oszacowanie za pomocą kolorowych sieci Petriego możliwości realizacji rozważanych decyzji konserwacyjnych dotyczących niezawodności i gotowości systemu kolejowego. Kolorowe sieci Petriego to metoda o wysokim poziomie formalizacji, którą w przedstawionej pracy wykorzystano do reprezentacji za pomocą różnych zestawów kolorów, różnych atrybutów utrzymania ruchu. Modele utrzymania ruchu oceniano zarówno na poziomie struktury jak i parametryzacji. Na poziomie struktury, poprawność struktury modeli utrzymania ruchu oceniano za pomocą analizy przestrzeni stanów. Na poziomie parametryzacji, zilustrowano konkretne decyzje dotyczące konserwacji. Niezawodność i gotowość systemu przy różnych parametrach utrzymania ruchu porównano z wynikami uzyskanymi za pomocą modelu kolorowych sieci Petriego.
Źródło:
Eksploatacja i Niezawodność; 2018, 20, 2; 236-243
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intelligent Forecasting of Automatic Train Protection System Failure Rate in China High-speed Railway
Inteligentne prognozowanie intensywności uszkodzeń automatycznego systemu ochrony pociągów kolei dużych prędkości w Chinach
Autorzy:
Kang, Renwei
Wang, Junfeng
Cheng, Jianfeng
Chen, Jianqiu
Pang, Yanzhi
Powiązania:
https://bibliotekanauki.pl/articles/301390.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
intelligent maintenance
high-speed railway
failure rate
automatic train protection system
prediction model
chaos
inteligentna konserwacja
kolej dużych prędkości
intensywność uszkodzeń
automatyczny system ochrony pociągu
model predykcyjny
Opis:
Intelligent and personalized dynamic maintenance and spare parts configuration of high-speed railway have been the main trend to guarantee the safety capability of trains. In this paper, a new Automatic Train Protection (ATP) system failure rate calculation method is proposed, and the delay time and embedded dimension are determined by C-C algorithm. Then the phase space is reconstructed from one-dimensional time series to high-dimensional space. Based on chaotic characteristics of failure rate, a short-term intelligent forecasting model of failure rate of ATP system is established. The actual failure statistics from 2010 to 2018 are used as samples to train and test the validity of the model. From prediction results, it shows that the proposed chaos prediction model has an accuracy of 99.71%, which is better than the support vector machine model. Through the intelligent prediction of failure rate, this paper solves the maintenance inflexibility and imbalance of supply and demand of spare parts configuration.
Inteligentna i spersonalizowana dynamiczna konserwacja i konfiguracja części zamiennych pociągów kolei dużych prędkości stanowią ostatnio główny trend w zakresie zapewniania bezpieczeństwa pociągów. W niniejszym artykule zaproponowano nową metodę obliczania intensywności uszkodzeń systemu Automatycznej Ochrony Pociągu (ATP), a czas opóźnienia i wymiar zanurzenia określano za pomocą algorytmu CC. Następnie, przestrzeń fazową przekształcono z jednowymiarowego szeregu czasowego do przestrzeni wielowymiarowej. Opierając się na chaotycznych charakterystykach intensywności uszkodzeń, utworzono model krótkoterminowego inteligentnego prognozowania awaryjności systemu ATP. Do uczenia modelu i weryfikacji jego trafności wykorzystano rzeczywiste dane statystyczne dotyczące awarii pociągów z lat 2010–2018. Z wyników prognoz wynika, że proponowany model predykcji, oparty na teorii chaosu, cechuje się dokładnością na poziomie 99,71%, czyli wyższą niż model maszyny wektorów nośnych. Dając możliwość inteligentnej predykcji intensywności uszkodzeń, niniejsza praca rozwiązuje problem braku elastyczności w utrzymaniu ruchu pociągów oraz braku równowagi między podażą a popytem na części zamienne.
Źródło:
Eksploatacja i Niezawodność; 2019, 21, 4; 567-576
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-10 z 10

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