New method for railway track quality identification through the safety dynamic performance of instrumented railway vehicle

作者：Barbosa Roberto Spinola^*

来源：Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2016, 38(8): 2265-2275.

DOI：10.1007/s40430-015-0471-9

• Railway
• Track
• Quality
• Safety
• Vehicle
• Dynamic

Track geometry locations that exceed geometry-standardized limits do not necessarily cause poor vehicle performance. However, there are locations under geometric limits that promote unsafe dynamic vehicle performance. To handle this dichotomy, a new method for track inspection is proposed to complement the traditional ones. An inertial measuring system and a specialized data treatment method is presented to evaluate the railway track quality, observed from the vehicle dynamic performance point of view. With inertial devices the system measures the vehicle dynamic movements during transit along an irregular track. Values measured are used in an inertial navigation algorithm with a Kalman filter, to identify the full vehicle attitude, including angular positions and accelerations. System equations for the inverse vehicle dynamic problem, augmented with the suspension torsion equation, is solved to directly estimate the wheels driving forces that are directly correlated with the vehicle safety. An adimensional Safety Index (SI) is proposed to evaluate track quality. Values obtained are used to quantify track harmful locations. Results of two test campaign travelling on the irregular track in a conventional train identify the full vehicle attitude and movement. The SI and the location of the most potential hazard region for track maintenance purposes were identified. Good correlation between SI and measured track geometry is observed being a promising technique.

• 出版日期2016-12