Engineering Mechanics ›› 2018, Vol. 35 ›› Issue (9): 37-43.doi: 10.6052/j.issn.1000-4750.2017.05.0384

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ADAPTIVE DELAY COMPENSATION METHOD FOR REAL-TIME HYBRID TESTING

WANG Zhen1,2,3, LI Qiang1,2,3, WU Bin1,2,3   

  1. 1. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China;
    2. Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China;
    3. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
  • Received:2017-05-19 Revised:2018-01-18 Online:2018-09-29 Published:2018-09-15

Abstract: Delay and its compensation are key problems for Real-time Hybrid Testing (RHT), which was developed from the pseudo-dynamic testing method. Conventional compensation methods are mostly based on constant delay assumption. However, system delay changes during tests due to system nonlinearity and performance change of the specimen, which results in undesirable test results. This paper proposes an adaptive delay compensation method based on online model parameter identification for RHT. The proposed method uses discrete models to simulate the servo loading system, online parameter identification to attain the loading system state; then the system delay is compensated based on this model. This paper firstly describes the method, and then numerically validates the feasibility and the effectiveness. The effect of different models is demonstrated as well.

Key words: real-time hybrid testing, delay compensation, adaptive, discrete model, accuracy

CLC Number: 

  • TU317+.9
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