Failure analysis and data-driven maintenance of road tunnel equipment

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 summa -rises 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 pre-dictive 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.