Optimal Sensor Placement for Structures Under Parametric Uncertainty

  • Rafael Castro-Triguero
  • Senthil Murugan
  • Michael I. Friswell
  • Rafael Gallego
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)


This paper examines the influence of parametric uncertainties on the optimal sensor placement methodologies for modal analysis of a truss bridge. Four classical sensor location methodologies are employed: two based on the Fisher information matrix and two based on energy matrix rank optimization. Young’s modulus, mass density and cross sectional dimensions are considered as uncertain parameters. The independent effects and cumulative effects of these uncertain variables on the sensor configuration are studied. The optimal locations of sensors under parametric uncertainty are assessed by the use of three different criteria. Furthermore, the robustness of this configuration is investigated for different levels of signal-to-noise ratio. The numerical results show the parametric uncertainties have significant influence on the optimal sensor configuration of a truss bridge.


Sensor placement Uncertainty Experimental/operational modal analysis 



We express special thanks to the Spanish Ministry of Education, Culture and Sport for Grant Number FPU-AP2009-3475 and to the Junta de Andalucía for the Research Project P09-TEP-5066.


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Copyright information

© The Society for Experimental Mechanics, Inc. 2013

Authors and Affiliations

  • Rafael Castro-Triguero
    • 1
  • Senthil Murugan
    • 2
  • Michael I. Friswell
    • 2
  • Rafael Gallego
    • 3
  1. 1.University of CordobaCordobaSpain
  2. 2.College of EngineeringSwansea UniversitySwanseaUK
  3. 3.University of GranadaGranadaSpain

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