000022158 001__ 22158
000022158 005__ 20170622145959.0
000022158 04107 $$aeng
000022158 046__ $$k2015-05-25
000022158 100__ $$aHessabi, Reza Mirza
000022158 24500 $$aCOMPARISON OF INTEGRATION ALGORITHMS FOR REAL-TIME HYBRID SIMULATION USING FREQUENCY DOMAIN-BASED ERROR INDICATORS

000022158 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022158 260__ $$bNational Technical University of Athens, 2015
000022158 506__ $$arestricted
000022158 520__ $$2eng$$aReal-time hybrid simulation (RTHS) is a testing method that combines computer simulation (i.e., analytical substructure) with physical testing (i.e., experimental substructure). This enables investigation of dynamic characteristics of load-rate dependent complex structures. To ensure reliable experimental results, even in the presence of sophisticated controllers and compensation methods, it is necessary to evaluate the accuracy of the success of the hydraulic actuators in imposing the command displacements. With recent developments in tracking error monitoring, new indicators have been proposed that are based on frequency domain analysis and can successfully uncouple phase (lag and lead) and amplitude (overshoot and undershoot) errors and quantify them. These new frequency-based error indicators are not structure-specific and can be reliably used to examine the effectiveness of each component of RTHS inner (i.e., servo-control) and outer (i.e., integration algorithm) loops. In this paper, frequency domain-based (FDB) error indicators are employed to evaluate the effectiveness of five commonly-used integration algorithms (i.e. central difference method, explicit Newmark method, discrete state space formulation with a zero-order hold and first-order hold, the state-space formulation by Zhang et al., and the alpha method) in different test scenarios. The applicability of the FDB error indicators to nonlinear systems is first verified through numerical simulations performed on a nonlinear system with predefined parameters. Then these indicators are used to post-process the experimental results obtained from RTHS’s with various integration algorithms. The experiments are carried out on a system with a nonlinear analytical substructure and a linear experimental substructure at the University of Toronto. Findings from numerical simulation and experimental results demonstrate that the FDB method is an efficient approach to compare performances of different integration algorithms.

000022158 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022158 653__ $$aReal-time hybrid simulation, frequency domain-based error indicators, integration algorithms.

000022158 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022158 720__ $$aHessabi, Reza Mirza$$iMercan, Oya$$iLiu, Yanhui$$iAshasi-Sorkhabi, Ali
000022158 8560_ $$ffischerc@itam.cas.cz
000022158 8564_ $$s500057$$uhttps://invenio.itam.cas.cz/record/22158/files/C1355.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022158 962__ $$r22030
000022158 980__ $$aPAPER