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Smart Structures and Systems
  Volume 14, Number 6, December 2014, pages 1151-1172
DOI: http://dx.doi.org/10.12989/sss.2014.14.6.1151
 


Development, implementation and verification of a user configurable platform for real-time hybrid simulation
Ali Ashasi-Sorkhabi and Oya Mercan

 
Abstract
    This paper presents a user programmable computational/control platform developed to conduct real-time hybrid simulation (RTHS). The architecture of this platform is based on the integration of a real-time controller and a field programmable gate array (FPGA).This not only enables the user to apply user-defined control laws to control the experimental substructures, but also provides ample computational resources to run the integration algorithm and analytical substructure state determination in real-time. In this platform the need for SCRAMNet as the communication device between real-time and servo-control workstations has been eliminated which was a critical component in several former RTHS platforms. The accuracy of the servo-hydraulic actuator displacement control, where the control tasks get executed on the FPGA was verified using single-degree-of-freedom (SDOF) and 2 degrees-of-freedom (2DOF) experimental substructures. Finally, the functionality of the proposed system as a robust and reliable RTHS platform for performance evaluation of structural systems was validated by conducting real-time hybrid simulation of a three story nonlinear structure with SDOF and 2DOF experimental substructures. Also, tracking indicators were employed to assess the accuracy of the results.
 
Key Words
    real-time hybrid simulation; performance evaluation; experimental substructure; analytical substructure; FPGA; phase error; amplitude error
 
Address
Ali Ashasi-Sorkhabi and Oya Mercan: Department of Civil Engineering, University of Toronto, 35 St. George Street, Toronto, ON, M5S 1A4, Canada
 

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