000009684 001__ 9684
000009684 005__ 20141205153144.0
000009684 04107 $$aeng
000009684 046__ $$k2008-10-12
000009684 100__ $$aChen, Cheng
000009684 24500 $$aA General Approach for Analysis of Actuator Delay Compensation Methods for Real-Time Testing

000009684 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009684 260__ $$b
000009684 506__ $$arestricted
000009684 520__ $$2eng$$aReal-time testing is a useful technique to evaluate the performance of structural systems subjected to seismic loading. Servo-hydraulic actuators can introduce an inevitable delay when applying command displacements to a structure during a real-time test due to their inherent dynamics. Various compensation methods have been developed and applied in real-time testing to minimize the effect of actuator delay. This paper proposes a general approach to analyze actuator delay compensation methods using an equivalent discrete transfer function. Discrete control theory is introduced and used to formulate the discrete transfer function in the frequency domain and the difference equation in the time domain for an actuator delay compensation method. The discrete transfer function is used to conduct frequency response analysis to provide insight into the expected performance of the compensation method by graphically illustrating the characteristics of the compensation method as a function of frequency of command displacement and the parameters for the compensator. The difference equation gives the form of the mathematical extrapolation in the time domain for the compensation method. Three popular compensation methods are selected to illustrate the proposed approach. Experiments with predefined sine sweep displacement are conducted to experimentally validate the analysis of the selected compensation methods using the proposed approach.

000009684 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009684 653__ $$areal-time testing, actuator delay, compensation, discrete transfer function, frequency response, difference equation, phase, magnitude

000009684 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009684 720__ $$aChen, Cheng$$iRicles, James M.
000009684 8560_ $$ffischerc@itam.cas.cz
000009684 8564_ $$s247373$$uhttps://invenio.itam.cas.cz/record/9684/files/S16-02-002.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S16-02-002.
000009684 962__ $$r9324
000009684 980__ $$aPAPER