Theoretical and experimental studies on critical time delay of multi-DOF real-time hybrid simulation

作     者：Lu Liqiao Wang Jinting Ding Hao Zhu Fei Lu Liqiao;Wang Jinting;Ding Hao;Zhu Fei

作者机构：State Key Laboratory of Hydroscience and EngineeringTsinghua UniversityBeijing 100084China China Huaneng Group Co.Ltd.Beijing 100031China Hisense Group Co.Ltd.Qingdao 266520China 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2022年第21卷第1期

页      面：117-134页

核心收录：

学科分类：08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：National Natural Science Foundation of China under Grant Nos.51725901 and 51639006 

主　　题：real-time hybrid simulation root locus critical time delay delay-dependent stability 

摘      要：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 Padéapproximation while conducting the discrete RL *** 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 ***,the critical time delays calculated by the continuous-and discrete-time RL techniques,respectively,are compared for a 2-DOF RTHS *** is shown that assuming the RTHS system to be a continuous-time system will result in overestimating the critical time ***,theoretically calculated critical delays are demonstrated and validated by numerical simulation and a set of RTHS *** analysis provides a glimpse of the effects of time step,frequency and damping ratio in a performing partitioning *** constructed analysis model proves to be useful for evaluating the critical time delay to predict stability and performance,therefore facilitating successful RTHS.