Adaptive control of shaking tables using the minimal control synthesis algorithm

Stoten, David P; Gomez, Eduardo

doi:10.1098/rsta.2001.0862

Cited by 77 publications

(65 citation statements)

References 8 publications

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“…Adaptive gains are directly synthesized from online signals to cater for time-varying, unknown or nonlinear plant dynamics. This algorithm is particularly suitable for the control of dynamic test facilities [30], as in many cases the structural dynamics are not exactly known and the response characteristics can therefore be unpredictable. Adaptive gains can compensate for these problems in real-time, thus improving test accuracy.…”

Section: Adaptive Substructuring Control Using An Additional Mcsef Almentioning

confidence: 99%

Testing of dynamically substructured, base‐isolated systems using adaptive control techniques

Lin

Stoten

et al. 2009

Earthq Engng Struct Dyn

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SUMMARYExperimental techniques for testing dynamically substructured systems are currently receiving attention in a wide range of structural, aerospace and automotive engineering environments. Dynamic substructuring enables full-size, critical components to be physically tested within a laboratory (as physical substructures), while the remaining parts are simulated in real-time (as numerical substructures). High quality control is required to achieve synchronization of variables at the substructuring interfaces and to compensate for additional actuator system(s) dynamics, nonlinearities, uncertainties and time-varying parameters within the physical substructures. This paper presents the substructuring approach and associated controller designs for performance testing of an aseismic, base-isolation system, which is comprised of roller-pendulum isolators and controllable, nonlinear magnetorheological dampers. Roller-pendulum isolators are typically mounted between the protected structure and its foundation and have a fundamental period of oscillation far-removed from the predominant periods of any earthquake. Such semi-active damper systems can ensure safety and performance requirements, whereas the implementation of purely active systems can be problematic in this respect. A linear inverse dynamics compensation and an adaptive controller are tailored for the resulting nonlinear synchronization problem. Implementation results favourably compare the effectiveness of the adaptive substructuring method against a conventional shaking-table technique. A 1.32% error resulted compared with the shaking-table response. Ultimately, the accuracy of the substructuring method compared with the response of the shaking-table is dependent upon the fidelity of the numerical substructure.

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Section: Adaptive Substructuring Control Using An Additional Mcsef Almentioning

confidence: 99%

Testing of dynamically substructured, base‐isolated systems using adaptive control techniques

Lin

Stoten

et al. 2009

Earthq Engng Struct Dyn

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“…It was found that the general field of control engineering had itself been forced to address similar problems in non-linear robotics and had developed adaptive control, in which the strategy adapts to changing characteristics of the robot, in particular its non-linear behaviour. A significant contribution to this adaptive-control development was by Stoten and Gomez (2001), whose minimal control synthesis (MCS) algorithm, implemented at six European laboratories (Commissariat a l'Energie Atomique (CEA) Saclay and Joint Research Centre (JRC), Ispra were now partners), removed the four deficiencies listed above. This now opened up the following five new research areas, for which the six partners received a series of EC-funded research contracts that finally ended in May 2006:…”

mentioning

confidence: 99%

The development of experimental methods in structural dynamics

Severn

2010

Structure and Infrastructure Engineering

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The development of experimental studies in the general field of structural dynamics is presented, with particular reference to earthquake and wind engineering. It starts with the 1960s studies at Laboratorio National de Engenharia Civil (LNEC) Lisbon, which were the first to consider and apply the conditions for dynamic similitude of models vibrating in water, and ends with current advances that make use of shaking tables and reaction walls, the two principal facilities now used. It is divided into two main parts, the first concerned with laboratory measurements, and the second with field measurements on as-built structures. In the first part, the emphasis is on thin arch dams, with particular concern for the hydrodynamic effect of the impounded reservoir water, and some reference to a cable-stayed bridge model. The second part deals with eccentric-mass vibrators and wind-induced vibration of two large arch dams in Switzerland, together with wind and traffic effects on the Humber suspension bridge.

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“…The MCS is widely used in electrohydraulic servo systems including the EHST. 2,18,37,40,[49][50][51][52][53] A block diagram of the MCS structure is given in Figure 8 …”

Section: Online Adaptive Controllermentioning

confidence: 99%

Experimental evaluation of acceleration waveform replication on electrohydraulic shaking tables

Shen

Zhu

et al. 2016

International Journal of Advanced Robotic Systems

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An electrohydraulic shaking table is an essential experimental facility in many industrial applications to real-time simulate actual vibration situations including structural vibration and earthquake. However, there is still a challenging area for its acceleration waveform replication because acceleration output responses of the electrohydraulic shaking table would not be as intended in magnitude and phase of an acceleration closed-loop system due to inherent hydraulic nonlinear dynamics of electrohydraulic servo systems. Thus, how to accurately and coordinately control parallel hydraulic actuators of the electrohydraulic shaking table is a critical issue; so, many control techniques have been developed to address the issue. Some currently used key techniques in this field are reviewed in the article, which are the objectives of academic investigations and industrial applications. The article reviews some new control algorithms for the electrohydraulic shaking table to obtain high-fidelity acceleration waveform replication accuracy.

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Adaptive control of shaking tables using the minimal control synthesis algorithm

Cited by 77 publications

References 8 publications

Testing of dynamically substructured, base‐isolated systems using adaptive control techniques

Testing of dynamically substructured, base‐isolated systems using adaptive control techniques

The development of experimental methods in structural dynamics

Experimental evaluation of acceleration waveform replication on electrohydraulic shaking tables

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