Shaking Table Substructure Testing Based on Three-Variable Control Method with Velocity Positive Feedback

被引:13
|
作者
Xu, Guoshan [1 ,2 ,3 ]
Wang, Zhen [1 ,2 ,3 ,4 ]
Bao, Yintong [5 ]
Yang, Ge [4 ]
Wu, Bin [4 ]
机构
[1] Harbin Inst Technol, Sch Civil Engn, Harbin 150090, Peoples R China
[2] Harbin Inst Technol, Key Lab Struct Dynam Behav & Control, Minist Educ, Harbin 150090, Peoples R China
[3] Minist Ind & Informat Technol, Key Lab Intelligent Disaster Mitigat, Harbin 150090, Peoples R China
[4] Wuhan Univ Technol, Sch Civil Engn & Architecture, Wuhan 430070, Peoples R China
[5] Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore
来源
APPLIED SCIENCES-BASEL | 2020年 / 10卷 / 16期
基金
中国国家自然科学基金;
关键词
shaking table substructure testing; velocity positive feedback control; three-variable control method; stability; accuracy; real-time hybrid simulation; TIME HYBRID-SIMULATION; EXPERIMENTAL-VERIFICATION; ACTUATOR DELAY; COMPENSATION; SYSTEM;
D O I
10.3390/app10165414
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
To improve the experimental accuracy and stability of shaking table substructure testing (STST), an explicit central difference method (CDM) and a three-variable control method (TVCM) with velocity positive feedback (VPF) are proposed in this study. First, the explicit CDM is presented for obtaining an improved control accuracy of the boundary conditions between the numerical and experimental substructures of STST. Compared with the traditional CDM, the proposed method can provide explicit control targets for displacement, velocity, and acceleration. Furthermore, a TVCM-VPF is proposed to improve the control stability and accuracy for loading the explicit control targets of displacement, velocity, and acceleration. The effectiveness of the proposed methods is validated by experiments on a three-story frame structure with a tuned liquid damper loaded on an old shaking table originally designed with the traditional displacement control mode. The experimental results show that the proposed explicit CDM works well, and the response rate and control accuracy of the shaking table are significantly improved with the contribution of the TVCM-VPF compared with those of the traditional proportional integral derivative (PID) controller. This indicates the advantage of the proposed TVCM-VPF over the traditional PID for STST. A comparison between the traditional shaking table test and STST shows that when the latter is based on the TVCM-VPF, it exhibits an excellent performance in terms of the stability and accuracy of displacement and an acceptable performance in terms of the acceleration accuracy.
引用
收藏
页数:21
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