0000000000307272

AUTHOR

Billie F. Spencer

showing 3 related works from this author

Frequency domain control based on quantitative feedback theory for vibration suppression in structures equipped with magnetorheological dampers

2009

This is an author-created, un-copyedited version of an article accepted for publication in Smart Materials and Structures. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at http://dx.doi.org/10.1088/0964-1726/18/9/095041 This paper addresses the problem of designing quantitative feedback theory (QFT) based controllers for the vibration reduction in a structure equipped with an MR damper. In this way, the controller is designed in the frequency domain and the natural frequencies of the structure can be directly accounted for in the process. T…

VDP::Mathematics and natural science: 400::Mathematics: 410::Applied mathematics: 413EngineeringNichols plotRetroacció (Electrònica)business.industryVDP::Technology: 500::Mechanical engineering: 570::Machine construction and engineering technology: 571Vibration controlControl engineeringNonlinear controlFeedback control systemsCondensed Matter PhysicsAtomic and Molecular Physics and OpticsDamperQuantitative feedback theoryMechanics of MaterialsControl theoryFrequency domainSignal ProcessingMagnetorheological fluidSistemes de control per retroaccióGeneral Materials ScienceElectrical and Electronic EngineeringFeedback (Electronics)businessCivil and Structural Engineering
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Semiactive Backstepping Control for Vibration Reduction in a Structure with Magnetorheological Damper Subject to Seismic Motions

2009

The use of magnetorheological (MR) dampers for mitigating vibrations caused by seismic motions in civil engineering structures has attracted much interest in the scientific community because of the advantages of this class of device. It is known that MR dampers can generate high damping forces with low energy requirements and low cost of production. However, the complex dynamics that characterize MR dampers make difficult the control design for achieving the vibration reduction goals in an efficient manner. In this article, a semiactive controller based on the backstepping technique is proposed. The controller was applied to a three-story building with an MR damper at its first floor subje…

Engineeringbusiness.industryMechanical EngineeringHybrid testingStructural engineeringDamperVibrationControl theoryBacksteppingMagnetorheological fluidGeneral Materials ScienceMagnetorheological damperbusinessReduction (mathematics)Journal of Intelligent Material Systems and Structures
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A mixed H<inf>2</inf>/H<inf>∞</inf>-based semiactive control for vibration mitigation in flexible structures

2009

In this paper, we address this problem through the design of a semiactive controller based on the mixed H 2 /H ∞ control theory. The vibrations caused by the seismic motions are mitigated by a semiactive damper installed in the bottom of the structure. It is meant by semiactive damper, a device that absorbs but cannot inject energy into the system. Sufficient conditions for the design of a desired control are given in terms of linear matrix inequalities (LMIs). A controller that guarantees asymptotic stability and a mixed H 2 /H ∞ performance is then developed. An algorithm is proposed to handle the semiactive nature of the actuator. The performance of the controller is experimentally evalu…

EngineeringShock absorberAutomatic controlControl theorybusiness.industryHybrid testingVibration controlStructural engineeringMagnetorheological damperbusinessActuatorDamperProceedings of the 48h IEEE Conference on Decision and Control (CDC) held jointly with 2009 28th Chinese Control Conference
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