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ORIGINAL RESEARCH article

Front. Built Environ.
Sec. Earthquake Engineering
Volume 10 - 2024 | doi: 10.3389/fbuil.2024.1393710
This article is part of the Research Topic Experimental Benchmark Control Problem on Multi-axial Real-time Hybrid Simulation View all 8 articles

Adaptive Sliding-mode Delay Compensation for Real-time Hybrid Simulations with Multiple Actuators

Provisionally accepted
yuekun Shangguan yuekun Shangguan 1zhen Wang zhen Wang 2*Yu Guo Yu Guo 2*yucai Chen yucai Chen 1*yunhai zeng yunhai zeng 1*huimeng Zhou huimeng Zhou 1
  • 1 Guangzhou University, Guangzhou, China
  • 2 Wuhan University of Technology, Wuhan, Hubei Province, China

The final, formatted version of the article will be published soon.

    Real-time hybrid simulation (RTHS) is a widely applied test method in structural engineering, which is developed from pseudo-dynamic test. Much of the past work has been centered on one-dimensional RTHS using a single hydraulic actuator. When the complexity of the problem demands to increase the number of degrees of freedom to be enforced on the boundary conditions, more than one hydraulic actuator must be used. Multiple-actuator or multi-axial RTHS (maRTHS) requires that more than one hydraulic actuator exerts the required motion on experimental substructures demanding the implementation of multiple-input multiple-output (MIMO) control strategies. A new maRTHS benchmark control problem has been developed, focusing on a frame subjected to seismic load at the base, substantially transforming and intensifying the complexity of the problem. The time delay generated by the dynamic characteristics of the loading system and the transmission process as well as the high coupling between the hydraulic actuators and the nonlinear kinematics escalates the complexity of the actuator control tracking. A sliding mode adaptive delay compensation method suitable for maRTHS is proposed, which utilizes a MIMO sliding mode method to reduce the coupling effects of actuators and the adaptive compensation method to compensate the residual delay. The effectiveness of the method is verified by numerical simulating different working conditions in the Benchmark Problem Platform.

    Keywords: multi-axial real-time hybrid simulation, Delay compensation method, decoupling, Adaptive, Sliding mode

    Received: 29 Feb 2024; Accepted: 29 Jul 2024.

    Copyright: © 2024 Shangguan, Wang, Guo, Chen, zeng and Zhou. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    zhen Wang, Wuhan University of Technology, Wuhan, 430070, Hubei Province, China
    Yu Guo, Wuhan University of Technology, Wuhan, 430070, Hubei Province, China
    yucai Chen, Guangzhou University, Guangzhou, China
    yunhai zeng, Guangzhou University, Guangzhou, China

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