People
doc. Dr. Ing. Tomáš Brandejský

2023, New Technology and Logistics on the Railway, Prague, ACTA Polytechnica CTU), p. 1-5), ISBN 978-80-01-07257-8, ISSN 2336-5382

This paper analyses the component of the Integrated Interlocking System which forms the central logical and functional unit implementing all logical and computational functions necessary for railway traffic control in the Railway 4.0 concept. The main principle is that this approach centralizes the technology of station interlocking system, track line interlocking systems, level crossing interlocking systems and the functions of train interlocking system - the line part of ETCS L2/3 radio block control panel (RBC). The operation control is centralised to the controlling dispatcher centres. The paper discusses the concept of integrated interlocking system including safety issues addressed from the perspective of the requirements of CENELEC standards EN 50126, EN 50128 and EN 50129. These requirements are addressed from the perspective of the authors of the paper, who also work as independent assessors of the safety of railway control and command systems.

2017, Student Scientific Conference Modernization of Railway IRICoN 2017, Praha, Czech Technical University in Prague), p. 1-5), ISBN 978-80-01-06297-5, ISSN 2336-5382

Presented contribution is dedicated to discussion of two different approaches into increase of programming language safety. They are language subset and extension of original safety mechanisms. As examples we used MISRA C/C++ subset and SPARK language build on the base of ADA language. In the last chapters we discuss novel approaches based on application of programmable hardware which is described in VHDL language, which is also modification of ADA language. Especially SPARK and VHDL languages represents novel approaches to safe system development which are now discussed in relation to new Railway SW projects.

2017, Modernization of Railway- IRICoN 2017, Praha, Česká technika - nakladatelství ČVUT), p. 6-7), ISBN 978-80-01-06140-4, ISSN 2336-5382

Nowadays we can observe two opposite approaches to modification of programming languages to be more suitable to safe system development. The first is the reduction of chosen programming language expressions to safe subset, like MISRA C/C++ and this approach is also supported by today standards of safe software development like ISO61508 or EN50128. In the last few years, novel and partially opposite development is expanded. It is based on extension of original language by additional explanations containing description of such aspects of software, that are not described enough by original language. Typical example is SPARK language precisiating original ADA one even though it was originally designed as language specialized to safe control system development.

2017, Recent Advances in Soft Computing: Proceedings of the 22nd International Conference on Soft Computing (MENDEL 2016) held in Brno, Czech Republic, at June 8-10, 2016, Berlin, Springer-Verlag), p. 26-33), ISBN 9783319580876, ISSN 2194-5357

The presented paper deals with problem of studying of Random Number Generators onto properties (especially efficiency) of GPA-ES algorithm. The first chapter brings simple introduction into the problem followed by description of GPA-ES algorithm from the viewpoint of influence of RNGs onto its function. The third chapter then describes organization of experiments and the next one brings their implementation details and simulation results. Then the fifth chapter discusses results, especially influence of different RNGs onto GPA-ES algorithm function and the sense and form on the next experiments.

2017, Modernization of Railway- IRICoN 2017, Praha, Česká technika - nakladatelství ČVUT), p. 8-9), ISBN 978-80-01-06140-4, ISSN 2336-5382

Increasing demands to railway capacity require to build new railway lines and to apply new approaches like information technologies. There are several new trends in rail traffic control. Firstly, the control is shifted from distributed system spread over stations to centralized one in all Europe. The most railway lines in the Czech Republic should be controlled from two offices in Přerov and Prague. The centralization of the operation control gives spread view of the situation but information quantity to evaluate by operators increases. Secondly, next modern trend (especially in Switzerland, Belgium and Germany) is a separation of strategy control (route planning from daily to annual interval) from operative control (conflicts solution caused by deviations from regular time-table due to infrastructure or vehicle faults) and from direct control (safety device operation, shunting). Each level of operation control process specific functions. Operative control IT support should react to deviation from planed daily time table; it monitors actual trains routes and solves potential conflicts with others trains in advance (from minutes to hours). The output is modified conflict-free time table – specific route plan transmitted to direct control level (realized by human operator or automatic system).

2017, Student Scientific Conference Modernization of Railway IRICoN 2017, Praha, Czech Technical University in Prague), p. 31-34), ISBN 978-80-01-06297-5, ISSN 2336-5382

The article focuses on analysis of possibilities of operatic control of railway traffic and its automatization and its support by information systems. Conditions, necessary pieces of input information like infrastructure description are discussed. RailML format is mentioned as suitable format for description in railway area. Optimization criterion and use of evolutionary techniques are suggested. The system is modeled in Railway Laboratory of the Faculty of Transportation Sciences, CTU in Prague.