دورية أكاديمية
Theoretical and experimental studies on critical time delay of multi-DOF real-time hybrid simulation.
| العنوان: | Theoretical and experimental studies on critical time delay of multi-DOF real-time hybrid simulation. |
|---|---|
| المؤلفون: | Liqiao, Lu, Jinting, Wang, Hao, Ding, Fei, Zhu |
| المصدر: | Earthquake Engineering & Engineering Vibration; Jan2022, Vol. 21 Issue 1, p117-134, 18p |
| مصطلحات موضوعية: | HYBRID computer simulation, MULTI-degree of freedom, BILINEAR transformation method, DAMPING (Mechanics), COMPUTER simulation, CRITICAL analysis |
| مستخلص: | This paper aims to investigate the critical stability of a multi-degree-of-freedom (multi-DOF) real-time hybrid simulation (RTHS). First, the critical time-delay analysis models are developed using the continuous- and discrete-time root locus (RL) techniques, respectively. A bilinear transform is introduced into the first-order Padé approximation while conducting the discrete RL analysis. Based on this technique, the time delay can be explicitly used as the gain factor and thus the instability mechanism of the multi-DOF RTHS system can be analyzed. Subsequently, the critical time delays calculated by the continuous- and discrete-time RL techniques, respectively, are compared for a 2-DOF RTHS system. It is shown that assuming the RTHS system to be a continuous-time system will result in overestimating the critical time delay. Finally, theoretically calculated critical delays are demonstrated and validated by numerical simulation and a set of RTHS experiments. Parametric analysis provides a glimpse of the effects of time step, frequency and damping ratio in a performing partitioning scheme. The constructed analysis model proves to be useful for evaluating the critical time delay to predict stability and performance, therefore facilitating successful RTHS. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: | Complementary Index |
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