Proposed Full-Scale Experimental Verification of Semiactive Control Applied to a Nonlinear Structure

Emmons, Andrew; Christenson, Richard

doi:10.1061/40878(202)4

Cited by 4 publications

(3 citation statements)

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“…Recently, special attention has been directed toward the application of this technique to evaluate the response of structures with MR dampers. Real-time hybrid experiments of structures with MR dampers have already been proposed and/or conducted by Emmons and Christenson [36], Wu et al [37] and Carrion and Spencer [24], among others. The system designed by Carrion and Spencer [24] is used in this study to implement and evaluate the performance of different semiactive controllers for vibration mitigation in a structure with an MR damper.…”

Section: Rtht Systemmentioning

confidence: 99%

Real-time hybrid testing of semiactive control strategies for vibration reduction in a structure with MR damper

Zapateiro

Karimi

Luo

et al. 2009

Struct. Control Health Monit.

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Magnetorheological (MR) dampers have been widely studied and employed to solve the vibration problem in structures such as buildings and bridges. It is known that MR dampers can generate high damping forces with low-energy requirements and low-cost productions. However, the complex dynamics that characterize MR dampers make difficult the control design to achieve the vibration reduction goals in an efficient manner. In this paper, semiactive controllers based on the backstepping and quantitative feedback theory techniques are proposed and their performances are compared with each other on the problem of vibration control in a structure with an MR damper. They are applied to a large-scale three-story building with an MR damper at its first floor subject to seismic motions. The performance of the proposed controllers is experimentally evaluated by means of real-time hybrid testing scheme that accounts for time delays and actuator dynamics, allowing for the test of velocity-dependent devices.

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Section: Rtht Systemmentioning

confidence: 99%

Real-time hybrid testing of semiactive control strategies for vibration reduction in a structure with MR damper

Zapateiro

Karimi

Luo

et al. 2009

Struct. Control Health Monit.

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show abstract

“…Recently, special attention has been directed toward the application of this technique to evaluate the response of structures with MR dampers. Real-time hybrid simulation of structures with MR dampers has already been conducted by Emmons and Christenson (2006), Wu et al (2006), and Carrion and Spencer (2006, 2007, 2008.…”

Section: Introductionmentioning

confidence: 96%

Real-time hybrid simulation for structural control performance assessment

Carrion

Spencer

Phillips

2009

Earthq. Eng. Eng. Vib.

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Real-time hybrid simulation is an attractive method to evaluate the response of structures under earthquake loads. The method is a variation of the pseudodynamic testing technique in which the experiment is executed in real time, thus allowing investigation of structural systems with rate-dependent components. Real-time hybrid simulation is challenging because it requires performance of all calculations, application of displacements, and acquisition of measured forces, within a very small increment of time. Furthermore, unless appropriate compensation for actuator dynamics is implemented, stability problems are likely to occur during the experiment. This paper presents an approach for real-time hybrid simulation in which compensation for actuator dynamics is implemented using a model-based feedforward compensator. The method is used to evaluate the response of a semi-active control of a structure employing an MR damper. Experimental results show good agreement with the predicted responses, demonstrating the effectiveness of the method for structural control performance assessment.

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“…Various RTHS tests have been conducted with MR dampers. Emmons and Christenson (2006) and Christenson et al (2008) examined the seismic performance of a numerical 3-story steel frame structure with three physical 200 kN MR dampers located between each of the stories, in RTHS tests at the University of Colorado at Boulder Network for Earthquake Engineering Simulation (NEES) facility. These tests used a 33 degree-of-freedom (DOF) model of the building.…”

Section: Introductionmentioning

confidence: 99%

Real-time hybrid simulation of a complex bridge model with MR dampers using the convolution integral method

Jiang¹,

Kim²,

Plude³

et al. 2013

Smart Mater. Struct.

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Magneto-rheological (MR) fluid dampers can be used to reduce the traffic induced vibration in highway bridges and protect critical structural components from fatigue. Experimental verification is needed to verify the applicability of the MR dampers for this purpose. Real-time hybrid simulation (RTHS), where the MR dampers are physically tested and dynamically linked to a numerical model of the highway bridge and truck traffic, provides an efficient and effective means to experimentally examine the efficacy of MR dampers for fatigue protection of highway bridges. In this paper a complex highway bridge model with 263 178 degrees-of-freedom under truck loading is tested using the proposed convolution integral (CI) method of RTHS for a semiactive structural control strategy employing two large-scale 200 kN MR dampers. The formation of RTHS using the CI method is first presented, followed by details of the various components in the RTHS and a description of the implementation of the CI method for this particular test. The experimental results confirm the practicability of the CI method for conducting RTHS of complex systems.

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Proposed Full-Scale Experimental Verification of Semiactive Control Applied to a Nonlinear Structure

Cited by 4 publications

References 0 publications

Real-time hybrid testing of semiactive control strategies for vibration reduction in a structure with MR damper

Real-time hybrid testing of semiactive control strategies for vibration reduction in a structure with MR damper

Real-time hybrid simulation for structural control performance assessment

Real-time hybrid simulation of a complex bridge model with MR dampers using the convolution integral method

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