000018331 001__ 18331
000018331 005__ 20170118182217.0
000018331 04107 $$aeng
000018331 046__ $$k2017-01-09
000018331 100__ $$aLai, Chin-Ta
000018331 24500 $$aAcceleration Tracking Control for Uniaxial Shaking Tables Considering System Performance and Robustness

000018331 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018331 260__ $$b
000018331 506__ $$arestricted
000018331 520__ $$2eng$$aShaking table testing has been regarded as one of the most direct experimental methods to evaluate the seismic response of structural systems subjected to earthquake ground motions. A typical uniaxial shaking table is composed of a hydraulic actuator, a servo valve, a digital controller, and a rigid platen. By driving the actuator, the seismic response of the structure mounted on the rigid platen can be investigated. However, it is difficult to reproduce earthquake acceleration accurately by using the commercial proportional-integral-derivative controller in displacement control mode. Therefore, acceleration control becomes essential to improve the performance of the shaking table. In this paper, an acceleration tracking control method for uni-axial shaking tables is proposed. System dynamics which considers the control-structure interaction is first identified. Then the analyses and syntheses of the feedforward and feedback controllers can be conducted. The feedforward controller is to shape the frequency response of the desired acceleration to improve the tracking performance of the shaking table test system. Inverse model technique is used to design the feedforward controller. On the other hand, the feedback controller is to enhance the stability margin considering the system uncertainty. Loop-shaping method is adopted to design the feedback controller. This control framework is realized by using advanced hardware and software, allowing rapid outerloop controller implementation. Finally, experimental validation is carried out to investigate the control performance. Experimental results indicate that the feedforward controller can effectively increase the frequency bandwidth of the table acceleration while the feedback controller further strengthens the system robustness.

000018331 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018331 653__ $$aacceleration tracking, shaking table, system performance, system robustness

000018331 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018331 720__ $$aLai, Chin-Ta$$iChen, Pei-Ching
000018331 8560_ $$ffischerc@itam.cas.cz
000018331 8564_ $$s482621$$uhttps://invenio.itam.cas.cz/record/18331/files/1248.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1248.
000018331 962__ $$r16048
000018331 980__ $$aPAPER