Resumen: Analysis of the fatigue life of a semitrailer structure necessitates identification of the loads and dynamic solicitations in the structure. These forces can be introduced in computer simulation software (multibody + finite element) for analysing the response of different design solutions to them.These numerical models must be validated and some parameters need to be measured directly in a field test with real vehicles under various driving conditions. In this study, a low-cost monitoring system is developed for application to a real fleet of semitrailers. According to the definition of the numerical model, the guidance of a virtual vehicle is defined by the three-dimensional kinematics of the kingpin. For characterisation of these movements, a monitoring system having a lowcost inertial measurement unit (IMU) and global positioning system (GPS) antennas is developed with different configurations to enable analysis of the best cost-benefit (result accuracy) solution, and an extended Kalman filter (EKF) that characterises the kinematic guidance of the kingpin is proposed. A semitrailer was equipped with the experimental low-cost monitoring systemand high-precision sensors (IMU, GPS) in order to validate the results obtained by the experimental low-cost monitoring system and the inertial-extended Kalman filter developed.The validated system has applicability in the low-cost monitoring of a fleet of real vehicles. Idioma: Inglés DOI: 10.1155/2016/1740854 Año: 2016 Publicado en: Journal of Sensors 2016 (2016), 1740854 [15 pp] ISSN: 1687-725X Factor impacto JCR: 1.704 (2016) Categ. JCR: INSTRUMENTS & INSTRUMENTATION rank: 26 / 58 = 0.448 (2016) - Q2 - T2 Categ. JCR: ENGINEERING, ELECTRICAL & ELECTRONIC rank: 126 / 260 = 0.485 (2016) - Q2 - T2 Factor impacto SCIMAGO: 0.273 - Control and Systems Engineering (Q3) - Instrumentation (Q3) - Electrical and Electronic Engineering (Q3)