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Memorias de investigación
Ponencias en congresos:
State space models for multi-setup operational modal analysis
Año:2014
Áreas de investigación
  • Teoría de probabilidades y procesos estocásticos,
  • Estadística,
  • Ingenierías,
  • Vibraciones
Datos
Descripción
Operational Modal Analysis consists on estimate the modal parameters of a structure (natural frequencies, damping ratios and modal vectors) from output-only vibration measurements. The modal vectors can be only estimated where a sensor is placed, so when the number of available sensors is lower than the number of tested points, it is usual to perform several tests changing the position of the sensors from one test to the following (multiple setups of sensors): some sensors stay at the same position from setup to setup, and the other sensors change the position until all the tested points are covered. The permanent sensors are then used to merge the mode shape estimated at each setup (or partial modal vectors) into global modal vectors. Traditionally, the partial modal vectors are estimated independently setup by setup, and the global modal vectors are obtained in a postprocess phase. In this work we present two state space models that can be used to process all the recorded setups at the same time, and we also present how these models can be estimated using the maximum likelihood method. The result is that the global mode shape of each mode is obtained automatically, and subsequently, a single value for the natural frequency and damping ratio of the mode is computed. Finally, both models are compared using real measured data.
Internacional
Si
Nombre congreso
9th International Conference on Structural Dynamics, EURODYN 2014
Tipo de participación
960
Lugar del congreso
Oporto
Revisores
Si
ISBN o ISSN
978-972-752-165-4
DOI
Fecha inicio congreso
30/06/2014
Fecha fin congreso
02/07/2014
Desde la página
2471
Hasta la página
2476
Título de las actas
Proceedings of the 9th International Conference on Structural Dynamics, EURODYN 2014
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Francisco Javier Cara Cañas (UPM)
  • Autor: Jesus Juan Ruiz (UPM)
  • Autor: Enrique Alarcon Alvarez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Estadística computacional y Modelado estocástico
  • Grupo de Investigación: Ingeniería Sísmica: Dinámica de Suelos y Estructuras
  • Departamento: Ingeniería de Organización, Administración de Empresas y Estadística
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