Development of high‐performance shake tables using the hierarchical control strategy and nonlinear control techniques

Yang, Tianliang; Li, Kang; Lin, Jian; Li, Yuanjie; Tung, Dorian P.

doi:10.1002/eqe.2551

Cited by 23 publications

(17 citation statements)

References 10 publications

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“…In this section, the ASMHC framework is proposed by combining the acceleration‐based SMC as the high‐level controller with the acceleration low‐level controller, as shown in Figure 4. Three existing control frameworks are also provided for comparison, namely the force‐based sliding mode hierarchical control (FSMHC), 33 displacement low‐level control (DLC), 34 and hybrid control (HC), 19 as shown in Figures 5–7.…”

Section: Methodsmentioning

confidence: 99%

Acceleration‐based sliding mode hierarchical control algorithm for shake table tests

Yao

Tan

Yang

et al. 2021

Earthq Engng Struct Dyn

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Existing control algorithms for seismic shake table tests (STTs) generally exhibit limitations such as poor acceleration tracking for displacement control, instability that results in table drift for direct acceleration, force, or velocity control, and the lack of a theoretical justification for hybrid control. Therefore, a reliable control algorithm has become key for effective shake table control. This paper presents acceleration‐based sliding mode control (SMC) as a solution to the drawbacks of the traditional force‐based SMC; in this manner, the influence of the force of the tested structure applied on the table as well as unmodeled complex nonlinear forces, such as friction, are counteracted. An acceleration‐based sliding mode hierarchical control (ASMHC) algorithm is proposed, where the acceleration‐based SMC is used as the high‐level controller to generate the corrected acceleration command, and the low‐level controller, that includes feed‐forward and feedback control, tracks the acceleration command in real time. The high‐level controller, having zero asymptotic stability, and the low‐level controller, designed based on the system transfer function, ensure tracking stability in time and frequency domains, respectively. The proposed ASMHC algorithm was first verified by a series of bare STTs, and was then applied to a real STT of a two‐story steel structure. The experimental results show that the proposed ASMHC algorithm can achieve good tracking of displacement, velocity, and acceleration in both time and frequency domains, which ensures accurate reproduction of seismic excitation in STTs.

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Section: Methodsmentioning

confidence: 99%

Acceleration‐based sliding mode hierarchical control algorithm for shake table tests

Yao

Tan

Yang

et al. 2021

Earthq Engng Struct Dyn

Self Cite

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show abstract

“…The robustness of this control method over the nonlinearities of the specimen and the servo-hydraulic system was demonstrated. To overcome uncertainties and nonlinearities in specimens and servo-hydraulic devices, Yang (Yang et al, 2015) proposed a hierarchical control strategy for uniaxial shaking tables. The sliding mode control technique was employed to provide robustness to compensate model nonlinearities and uncertainties experienced during tests.…”

Section: Accurate Control Of Shakingmentioning

confidence: 99%

Advances in Real-Time Hybrid Testing Technology for Shaking Table Substructure Testing

Tian

Shao

Zhou

et al. 2020

Front. Built Environ.

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Shaking table substructure testing (STST) takes the substructure with complex behavior physically tested, with the behavior of the rest structural system being numerically simulated. This substructure testing allows the payload of a shaking table being fully utilized in testing of the most concerned part, thus significantly increases its loading capacity. The key to achieve a successful STST is to coordinate among the substructures, specifically, to satisfy compatibility, equilibrium, and synchronization at the boundary between numerical and experimental substructures. A number of studies have focused on the essential techniques of STST, and several applications have been carried out. Nonetheless, its progress is still in the preliminary stage, because of the limited applications using multi-directional shaking tables on large-scale specimens. This paper reviews a series of STSTs and their associated implementation aspects including hybrid testing frameworks, time integration algorithms, delay compensation methods, shaking table and actuator control schemes and boundary force measurement methods. The key techniques required for a successful test are also stressed, such as the force control of actuators to coordination among the substructures. Finally, challenges for future studies and applications are identified and presented.

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“…Luco et al [5] studied the performance of the acceleration tracking of a uniaxial shaking table and proposed improvements to the instrument by performing harmonic scanning for different amplitudes and frequencies. Yang et al [6], in their study on the acceleration, velocity, and displacement control of a high-performance shaking table to investigate nonlinear behavior in the system. In addition to the studies on increasing the performance of the table and monitoring system, there are also studies examining the small scale models placed on shaking tables.…”

Section: Introductionmentioning

confidence: 99%

A Calibration Technique for Bi-axial Shake Tables with Stepper Motor

et al. 2022

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Shaking tables are frequently used to determine the dynamic behavior of structures in the laboratory environment. In order to obtain realistic results in experimental studies, table response and performance should be consistent with the desired motion. In this multidisciplinary study, an application of a new method for determining and calibrating the mechanical response of a developed bi-axial displacement controlled shake table according to the desired motion data is presented. The bi-axial shake table's electro-mechanical components consist of stepper motors, ball screw sets, linear ball bearings, and linear potentiometers positioned on both axes for displacement measurements. For the control and data acquisition (DAQ) unit of the shake table, an open-source electronic prototyping platform Arduino was used. From several experimental results, it was seen that, with the presented calibration method, harmonic and earthquake simulations could be achieved with a relative root mean square error (relative RMS error) of less than 5% for desired displacement-time histories.

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Development of high‐performance shake tables using the hierarchical control strategy and nonlinear control techniques

Cited by 23 publications

References 10 publications

Acceleration‐based sliding mode hierarchical control algorithm for shake table tests

Acceleration‐based sliding mode hierarchical control algorithm for shake table tests

Advances in Real-Time Hybrid Testing Technology for Shaking Table Substructure Testing

A Calibration Technique for Bi-axial Shake Tables with Stepper Motor

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