000019062 001__ 19062
000019062 005__ 20170118182257.0
000019062 04107 $$aeng
000019062 046__ $$k2017-01-09
000019062 100__ $$aFermandois-Cornejo, Gaston
000019062 24500 $$aFramework Development for  Multi-Axial Real-Time Hybrid Simulation Testing

000019062 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019062 260__ $$b
000019062 506__ $$arestricted
000019062 520__ $$2eng$$aReal-time hybrid simulation is an efficient and cost-effective cyber-physical dynamic testing technique for performance evaluation of structural systems subjected to earthquake loading with rate-dependent behavior. A loading assembly with multiple actuators is required to impose realistic boundary conditions on physical specimens. However, such a testing system is expected to exhibit significant actuator dynamic coupling and suffer from potential time delays that are associated to servo-hydraulic system dynamics and control-structure interaction (CSI). One approach to reduce experimental errors considers a multi-input, multi-output (MIMO) approach to design controllers for accurate reference tracking and noise rejection. In this paper, a framework for multi-axial real-time hybrid simulation (maRTHS) testing is presented. The methodology consists in designing a cyber-physical system with multiple actuators with real-time control in Cartesian coordinates. For this matter, kinematic transformations between actuator space and Cartesian space are derived to control all six-degrees-of freedom of the moving platform in 3D Cartesian space. Then, a frequency domain identification technique with non-linear optimization tool is used to derive a model of the MIMO transfer function. Further, a Cartesian-domain model-based feedforward-feedback controller is implemented for delay compensation and to increase the robustness of the reference tracking for given model uncertainty. The framework is implemented using the 1/5th-scale Load and Boundary Condition Box (LBCB) located at the University of Illinois at Urbana-Champaign. To validate the proposed framework, a small scale structural systems with a physical cantilever rubber column specimen is considered. For real-time execution, the numerical substructure, kinematic transformations and controllers are implemented over an embedded system with a microcontroller and digital signal processor. Finally, the stability of the real-time system is demonstrated for an illustrative example of a single-degree-of-freedom structure subjected to earthquake loading. The test results shows that the framework can accurately provide excellent reference tracking performance.

000019062 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019062 653__ $$areal-time hybrid simulation; multiple actuator; dynamic coupling; kinematic transformations; model-based compensation.

000019062 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019062 720__ $$aFermandois-Cornejo, Gaston$$iSpencer, Billie F.$$iJr.
000019062 8560_ $$ffischerc@itam.cas.cz
000019062 8564_ $$s1004981$$uhttps://invenio.itam.cas.cz/record/19062/files/2770.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2770.
000019062 962__ $$r16048
000019062 980__ $$aPAPER