000011158 001__ 11158
000011158 005__ 20141205155842.0
000011158 04107 $$aeng
000011158 046__ $$k2008-10-12
000011158 100__ $$aNguyen, Van Thuan
000011158 24500 $$aPhase Lag Compensation in Real-Time Substructure Testing Based on Online System Identification

000011158 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011158 260__ $$b
000011158 506__ $$arestricted
000011158 520__ $$2eng$$aIn control of real-time substructure tests, time delay or phase lag of actuators is a very important issue. Research on phase lag of actuators shows that phase lag induces negative damping in such tests (Horiuchi et al. 1999). This can cause error and may lead to instability. Thus, phase lag of actuators should be reduced to improve accuracy and performance of real-time substructure tests. Some compensation methods can be used to compensate phase lag in real-time substructure tests. The time delay compensations proposed by Horiuchi et al. (1996, 1999, 2001) use extrapolation techniques to predict displacements for the future. In these methods, there is no feedback mechanism to minimize the error of the prediction. The adaptive polynomial method (Wallace et al. 2005) and the compensation with feed-forward and feed-back control (Spencer et al. 2007) are more advanced since they have mechanisms to minimize error. This paper introduces a new phase lag compensation, which is based on online system identification in the time domain. Since error of movement due to phase lag of actuator is very well related to the dynamic response of the system, this error can be estimated and then compensated. An advantage is that the compensator has a feedback mechanism to minimize the error of estimation and there is a possibility to develop the compensator to cope with time-varying or nonlinear systems. Numerical and experimental results on hydraulic systems with earthquake loads show the applicability of this compensation method for substructure tests in civil engineering.

000011158 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011158 653__ $$atime delay compensation, phase lag compensation, real-time substructure test, substructure algorithm, system identification

000011158 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011158 720__ $$aNguyen, Van Thuan$$iDorka, Uwe
000011158 8560_ $$ffischerc@itam.cas.cz
000011158 8564_ $$s210381$$uhttps://invenio.itam.cas.cz/record/11158/files/12-01-0148.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 12-01-0148.
000011158 962__ $$r9324
000011158 980__ $$aPAPER