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Metoda testowania i diagnostyki specjalizowanych urządzeń sterowania ruchem drogowym

Firląg K.

Autobusy : technika, eksploatacja, systemy transportowe

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2017

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R. 18, nr 12

869--872, CD

PL

Użycie układów programowalnych do realizacji specjalizowanych urządzeń sterowania ruchem drogowym wymaga specyficznego podejścia do modelowania i testowania tych urządzeń. Ważna rola tych urządzeń w systemie sterowania i duży wpływ na bezpieczeństwo ruchu, wymaga wykorzystania nowoczesnych metod testowania i diagnostyki. W artykule przedstawiona została metoda testowania i diagnostyki specjalizowanych sterowników ruchu drogowego. Omówiono rozwiązania umożliwiające wykrycie błędów i uszkodzeń realizacji urządzeń oraz uszkodzeń powstających podczas eksploatacji. Uszkodzenia te możliwe są do wykrycia jedynie podczas testowania fizycznego urządzenia lub jego prototypu. Przedstawiono metody realizacji wbudowanego testowania sterowników BIST. Zaproponowano architektury BIST zarówno dla testowania współbieżnego jak i prewencyjnego. Przeanalizowano wpływ różnych struktur BIST na parametry użytkowe sterowników.

EN

The use of programmable systems for realization of specialized road traffic control devices requires a specific approach to modelling and testing of the devices. A significant role of these devices within the traffic control system as well as an enormous impact on traffic safety demands application of modern methods of testing and diagnostics. The paper presents the method of testing and diagnostics of specialized road traffic controllers. Solutions have been discussed allowing for detection of errors and defects within device realization, and defects arising during exploitation. These defects are possible to be detected only during physical testing of the device or its prototype. Methods of realization of built-in self-test (BIST) have been presented. BIST architectures have been proposed both for concurrent as well as preventive testing. The influence of various BIST structures on operational parameters of controllers have been analysed.

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Development of a statistically-based methodology for analyzing automatic safety treatments at isolated high-speed signalized intersections

Wojtal R. M., Rilett L. R.

Archives of Transport

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2017

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Vol. 44, iss. 4

75--88

EN

Crashes at isolated rural intersections, particularly those involving vehicles traveling perpendicularly to each other, are especially dangerous due to the high speeds involved. Consequently, transportation agencies are interested in reducing the occurrence of this crash type. Many engineering treatments exist to improve safety at isolated, high-speed, signalized intersections. Intuitively, it is critical to know which safety treatments are the most effective for a given set of selection criteria at a particular intersection. Without a well-defined decision making methodology, it is difficult to decide which safety countermeasure, or set of countermeasures, is the best option. Additionally, because of the large number of possible intersection configurations, traffic volumes, and vehicle types, it would be impossible to develop a set of guidelines that could be applied to all signalized intersections. Therefore, a methodology was developed in this paper whereby common countermeasures could be modeled and analyzed prior to being implemented in the field. Due to the dynamic and stochastic nature of the problem, the choice was made to employ microsimulation tools, such as VISSIM, to analyze the studied countermeasures. A calibrated and validated microsimulation model of a signalized intersection was used to model two common safety countermeasures. The methodology was demonstrated on a test site located just outside of Lincoln, Nebraska. The model was calibrated to the distribution of observed speeds collected at the test site. It was concluded that the methodology could be used for the preliminary analysis of safety treatments based on select safety and operational measures of effectiveness.

3

Problemy certyfikacji urządzeń srk na przykładzie ERTMS

Białoń A., Gradowski P., Toruń A.

Problemy Kolejnictwa

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2011

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Z. 152

77-88

PL

W artykule przedstawiono podstawowe definicje, uwarunkowania prawne i zasady prowadzenia certyfikacji wyrobów. Opisano proces certyfikacji urządzeń srk zgodnie z uwarunkowaniami krajowymi i wymaganiami WE. Podkreślono rolę jednostki notyfikowanej przy certyfikacji zgodnej z wymaganiami WE.

EN

The paper presents essential definitions, legal requirements and product certification procedures. Safety installation certification process according to both the domestic and EC legislation requirements is described. The role of the notified body during certification according to EC requirements was underlined.

4

Weryfikacja i testowanie urządzeń sterowania ruchem drogowym realizowanych w układach FPGA

Firląg K., Kawalec P.

Logistyka

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2009

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nr 6

CD-CD

PL

W artykule przedstawiony został proces powstawania urządzeń sterowania ruchem drogowym w strukturach FPGA, z podziałem na główne etapy. Dla każdego z nich został przedstawiony i przeanalizowany problem występowania i wykrywania błędów działania. Rozpatrzono błędy wynikające z błędnej specyfikacji, błędnej realizacji układu oraz błędy powstałe w wyniku uszkodzenia realizacji. Opracowaną w ten sposób metodykę weryfikacji i testowania, wykorzystując narzędzia CAD, zastosowano do badania modeli sterowników lokalnych ruchu drogowego wyspecyfikowanych w języku VHDL i zrealizowanych w układach FPGA.

EN

The article presents creation process of traffic control devices in FPGA structures with the division into main stages. For each of these devices, the problem of occurring and detecting operation errors has been presented and analysed. Errors resulting from incorrect specification, erroneous realization and errors resulting from damaged realization have been analysed. Verification and testing methodology designed in the abovementioned way, with the use of CAD devices, has been used in testing local traffic controllers specified in VHDL language and realized in FPGA devices.

5

Reliability analysis of specialised traffic control devices

Kawalec P., Firląg K.

Archives of Transport

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2007

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Vol. 19, iss. 1-2

75-82

EN

This article discusses testing and reliability of traffic control devices in transportation. Applied measures of reliability have been presented. The article puts a special emphasis on the issue of calculating traffic control devices' reliability parameters. A method of setting MTBF parameter for devices implemented in FPGA circuits has been presented. AIso, an estimation of reliability coef-ficients for local traffic controller using different FPGA circuits has been made.

PL

W artykule omówiono zagadnienia testowania i niezawodności układów sterowania ruchem w transporcie. Przedstawiono stosowane miary niezawodności, ze szczególnym uwzględnieniem zagadnień wyznaczania parametrów niezawodnościowych dla cyfrowych układów sterowania ruchem. Zaprezentowano metodę wyznaczania parametru MTBF dla urządzeń zrealizowanych w układach FPGA. Dokonano przykładowego oszacowania współczynników niezawodności dla lokalnego sterownika ruchu drogowego zrealizowanego w różnych układach FPGA.

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Evaluation of service lifetime of avionic hydrostatic drives on the background of information acquired from the human-independent flight control devices

Ułanowicz L.

Journal of KONBiN

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2006

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No. 2

345--360

EN

The paper discloses the method for evaluation of service lifetime of on board avionic hydrostatic drives on the background of information acquired from human independent flight control devices on the basis of description how the structural parameters of the system subject to alterations over the equipment lifetime. The description of structural parameters related to the hydrostatic drives takes advantage of these data from the human-independent flight control devices that have not been used so far and establishes correlation between these data and the measurement signals that are typical for the drives. Evaluation of the service lifetime employed by the presented method consists in comparison between the values for actual structural parameters and adequate threshold limits under provision that specific parameters affecting the process of predicted lifetime evaluation as well as describing the technical condition of the devices are mutually independent. Identification of structural parameters attributable to avionic hydrostatic drives was carried out on the basis of information that can be acquired from human-independent flight control devices. The theoretical backgrounds for the proposed method related to assessment of technical condition of an avionic hydrostatic drive and evaluation of its expected lifetime on the background of information acquired from the human-independent flight control devices are presented, as well as measurement data are listed whereas the data had been acquired from human-independent flight control devices and they refer to structural parameters of avionic hydrostatic drives for two types of aircrafts that are operated by Polish Air Forces.