In the last years, railway networks have had considerable expansion on all continents: both for transport of passenger and for commercial purposes. Therefore, concerning future role that rail transport will have it is necessary to study ways that allow reliable working and reduce maintenance costs. One of the fundamental aspects in achieving these targets is the study of the interaction between pantograph and catenary, crucial for smooth power transmission and avoiding wear. . In particular , thanks to the development of artificial intelligence technologies and increasingly precise image-taking systems, several fault detection and diagnosis techniques for high-speed train are used nowadays; these technologies allow to identify possible anomalies in operating conditions, compared to the nominal operation regime.