Lidé na fakultě
Ing. Lukáš Kacar

2025, Transactions on Transport Sciences, 16 (3), p. 10-15), ISSN 1802-9876

This contribution discusses the issue of approaching safety issues for newly introduced autonomous rail vehicle operation systems with the GoA3/GoA4 automation level. In particular, the paper discusses the issue of normative requirements for establishing and demonstrating safety requirements that are in place today for railway systems. The paper seeks to define the minimum criteria or processes that should be met and demonstrated in order for autonomous train operation to be accepted as sufficiently safe for commercial operation.

Článek v periodiku excerpovaném databází Scopus cizojaz.

2025, 2025 Smart City Symposium Prague - IEEE proceedings, New York, IEEE Press), ISBN 979-8-3315-2551-4, ISSN 2831-5618

The sustainable development of urban technological and technical systems is closely linked to the acquisition of relevant data and information. Such information is crucial not only for the effective management and administration of these systems but also for identifying critical risk points and monitoring the life cycle of infrastructure. A key element is the use of information modeling and predictive approaches that facilitate continuous monitoring throughout the entire operational phase, thereby ensuring effective maintenance planning. This paper synthesizes various methods and technologies employed in the information modeling of technological systems and explores their application in the modeling and simulation of external factors affecting transport infrastructure. Particular emphasis is placed on the predictive maintenance of technological equipment, with tunnel technology analyzed as a case study a key component of urban transport and technological infrastructure. The primary objective is to demonstrate

Stať ve sborníku z prestižní konf. (Scopus)

2025, Inżynieria Mineralna, 2 (2), ISSN 1640-4920

Autonomous train operation (defined by the on-board part of the ATO - Automatic Train Operation) is a key innovation in rail transport, bringing increased efficiency and safety. Ensuring ATO safety is a key challenge that can be addressed by integration with the European Train Control System (ETCS). This paper focuses on using ETCS safety mechanisms to ensure the safety of autonomous train control. The following paper analyses the possibility of taking over the ETCS safety guarantees into the ATO. It focuses on the different types of data provided by the ETCS, including static train data, dynamic data (movement authority, speed profile, gradient, localization, ETCS modes and traction) and information about the braking capabilities of the train. The key question is whether this information can be relied upon to implement autonomous control without additional redundant mechanisms. According to the RAMS (Reliability, Availability, Maintainability, and Safety) analysis, existing safety features can be adopted if the risks corresponding to the subsystem are sufficiently reduced and there is a secure link between the ATO and the ETCS systems. The specific physical interconnection via Ethernet plays an important role here. This link is described directly in the European Railway Agency specifications. Twelve packets of information are transmitted through this link. The aim is to verify whether it is possible to take over the safety guarantees of the ETCS for the ATO and to find the interface requirements between these systems. The main requirements of the ATO functions that process the ETCS information are to stop safely at a defined location, to keep to the schedule within the conditions specified by the ETCS, to optimize the speed for efficient traction energy consumption and to start the station check-in sequence only after all safety conditions have been met. The methodology includes the analysis of the common interface between the ATO and the ETCS and applying RAMS procedures to identify and mitigate risks. The following paper describes that the ETCS provides robust safety barriers during standard train operation at GoA 1 (Grade of Automation), allowing the ATO system to rely on its safety features and focus on the additional risks associated with autonomous control at higher GoA levels. However, the key factor is to ensure a secure connection between the ATO and the ETCS in accordance with the applicable standards. This paper should contribute to a better understanding of the links between the ATO and the ETCS. It also provides important information for the further development of autonomous railway systems.

Článek v odborném recenzovaném periodiku

2024, Driver-Car Interaction and Safety Conference 2023, Praha, České vysoké učení technické v Praze), p. 109-113), ISBN 978-80-01-07387-2, ISSN 2336-5382

The article describes the practical experience of testing a specific ticketing system for public transport based on blockchain technology. The testing aimed to verify the overall functionality of the complex system as well as the correct execution of the functions of its selected parts, which consist of several separately developed but closely cooperating subsystems: blockchain, clearing, and mobile application subsystem with support of bank payment system. Communication between the different parts was implemented through APIs developed for this purpose. The availability of API documentation and the implementation on Linux OS allowed the use of sophisticated tools for testing and performing both manual and automated tests. Performed tests made it possible to detect errors in the program code of the respective components and to provide the basis for their elimination. Applied approaches and tools can be used to test similar complex information-handling systems.

Stať ve sborníku z prestižní konf. (Scopus)