Lidé na fakultě
Ing. Jiří Štefan

rozklikni NABÍDKU

Publikace

informace pocházejí z univerzitní databáze V3S

Autoři:
doc. Ing. Tomáš Tichý, Ph.D., MBA; Ing. Jiří Brož, MSc., Ph.D.; Ing. Jiří Štefan; Pirnik, R.
Publikováno:
2023, Results in Engineering, 18, ISSN 2590-1230
Anotace:
The operation and maintenance of each technological system are essential parts of the life cycle. This article describes the result of the analysis of diagnostic data from tunnel equipment and its use. The analysis was carried out with the main objective of finding relations that could be further applied as a specific approach for the diagnostic procedure and possibly for future predictive maintenance of tunnel equipment. The article summarises the research of the project focused on the suitability of diagnostic data for potential use of predictive data-driven maintenance of technological parts in road tunnels. Data records were captured in the technological and tunnel control systems deployed in the Czech tunnels. The relations between warning and failure notifications were analysed together with the selected physical conditions of tunnel equipment during the operation by using measurements of technical parameters such as undervoltage, temperature, etc. Additionally, the impact of these parameters was monitored and evaluated according to the life cycle of the equipment. This resulted in a sequence analysis of states and events detected on particular equipment. In the article, the relations between measured technical parameters and failures are presented, together with the solution proposal that could be applied for failure prediction and enhancements of road tunnels operation and its technological systems by applying predictive maintenance of tunnel equipment. The presented outputs show that the cause of VMS failures can be the reaching of a critical device temperature or undervoltage, that are measurable, detectable even before the failure itself, which can be potentially predicted in this way.
DOI:
10.1016/j.rineng.2023.101034
Typ:
Článek v periodiku excerpovaném databází Scopus

Autoři:
doc. Ing. Tomáš Tichý, Ph.D., MBA; Ing. Jiří Brož, MSc., Ph.D.; Nováka, R.A.; Máša, P.; Šmerda, T.; Ing. Jiří Štefan
Publikováno:
2023, SYSTEM AND ETHICAL APPROACHES 2023 PROCEEDINGS, Praha, Vysoká škola ekonomická v Praze), p. 5-6), ISBN 978-80-245-2508-2
Anotace:
This presentation focuses on the application of predictive diagnostics and maintenance of technological equipment and systems that are applied in traffic telematics systems. Examples of such systems include light-controlled intersections, tunnel systems, camera systems and other systems that can also be called intelligent transport systems (ITS). The requirement of administrators of transport and technological infrastructure is not only to ensure the correct functioning and operation of the quipment in the form of maintenance, but also its gradual renewal. Furthermore, last but not least, optimization of operating costs and service costs of ITS equipment.
Typ:
Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:
Ing. Jiří Štefan; doc. Ing. Tomáš Tichý, Ph.D., MBA; Ing. Jiří Brož, MSc., Ph.D.
Publikováno:
2022, Analysis of Diagnostic Data of Tunnel Structures Control Systems, 31 (2), p. 42-48), ISSN 1211-0728
Anotace:
The aim of the article is to show the possibilities of a simple analysis of data obtained from the control system of a tunnel structure. The analysis has a great benefit for managing the maintenance of the tunnel system and specifying the life cycle of individual technological parts. The fundamental aspects of the topic are based on expert assessment during the main inspections of the technological equipment of motorway tunnels. Analysis of data and other operation records can provide a quick picture of the overall function of the tunnel’s technological equipment during the period under review. The text includes specific examples of tunnel technology failures, including an algorithm for approaching the issue.
Typ:
Článek v odborném recenzovaném periodiku cizojazyčně

Autoři:
Ing. Jiří Štefan; doc. Ing. Tomáš Tichý, Ph.D., MBA; Ing. Jiří Brož, MSc., Ph.D.
Publikováno:
2022, Tunel, 31. (2), p. 42-48), ISSN 1211-0728
Anotace:
Cílem článku je ukázat možnosti jednoduché analýzy dat získaných z řídicího systému tunelové stavby. Analýza má velký přínos pro řízení údržby tunelového systému a zpřesnění životního cyklu jednotlivých technologických částí. Zásadní aspekty tématu vycházejí z expertního posuzovaní při hlavních prohlídkách technologického vybavení tunelů na pozemních komunikacích. Analýza dat a dalších provozních záznamů může poskytnout rychlý obraz o celkové funkci technologického vybavení tunelové stavby za posuzované období. Součástí textu jsou konkrétní ukázky poruch tunelové technologie včetně algoritmu přístupu k dané problematice.
Typ:
Článek v odborném recenzovaném periodiku česky

Autoři:
Ing. Jiří Štefan; Müller, Z.; Tlustý, J.
Publikováno:
2016, 2016 17th International Scientific Conference on Electric Power Engineering (EPE 2016), New York, IEEE), ISBN 978-1-5090-0907-7
Anotace:
The paper introduce project TA04021240 „Intelligent system for safe and reliable power supply“. Its aim is to find technical solution for medium-term emergency power supply.
Typ:
Stať ve sborníku z mezinár. konf.