Recent Studies of Adaptive Tuned Vibration Absorbers/Neutralizers

Kela, Lari; Vähäoja, Pekka

doi:10.1115/1.3183639

Cited by 72 publications

(32 citation statements)

References 63 publications

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“…Since then there has been a substantial body of work on various types of absorbers, most of which are described in a series of review papers [3][4][5][6]. This paper is concerned with a specific type of nonlinear absorber in which the stiffness of the device is a function of the excitation level.…”

Section: Introductionmentioning

confidence: 99%

Experimental characterization of a nonlinear vibration absorber using free vibration

Tang

Brennan

Gatti

et al. 2016

Journal of Sound and Vibration

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a b s t r a c tKnowledge of the nonlinear characteristics of a vibration absorber is important if its performance is to be predicted accurately when connected to a host structure. This can be achieved theoretically, but experimental validation is necessary to verify the modelling procedure and assumptions. This paper describes the characterization of such an absorber using a novel experimental procedure. The estimation method is based on a free vibration test, which is appropriate for a lightly damped device. The nonlinear absorber is attached to shaker which is operated such that the shaker works in its mass-controlled regime, which means that the shaker dynamics, which are also included in the measurement, are considerably simplified, which facilitates a simple estimation of the absorber properties. From the free vibration time history, the instantaneous amplitude and instantaneous damped natural frequency are estimated using the Hilbert transform. The stiffness and damping of the nonlinear vibration absorber are then estimated from these quantities. The results are compared with an analytical solution for the free vibration of the nonlinear system with cubic stiffness and viscous damping, which is also derived in the paper using an alternative approach to the conventional perturbation methods. To further verify the approach, the results are compared with a method in which the internal forces are balanced at each measured instant in time.

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Section: Introductionmentioning

confidence: 99%

Experimental characterization of a nonlinear vibration absorber using free vibration

Tang

Brennan

Gatti

et al. 2016

Journal of Sound and Vibration

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“…In recent years, semi-active, active and hybrid Tuned Mass Dampers have arisen in the field of structural control as complementary or alternative with respect to passive TMDs [27][28][29]. Such devices can change their governing parameters so as to extend their operating range and produce possible modifications of the structural behaviour.…”

Section: Introductionmentioning

confidence: 99%

On the optimization of a hybrid tuned mass damper for impulse loading

Salvi¹,

Rizzi²,

Rustighi³

et al. 2015

Smart Mater. Struct.

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The present paper deals with the optimisation of a hybrid Tuned Mass Damper (TMD) in reducing the transient structural response due to impulse loading. In particular, a unit impulse excitation has been assumed, acting as base displacement, which is a situation that may occur in different real applications. The proposed hybrid Tuned Mass Damper is composed of a previously optimised passive TMD and an added optimised active controller. Such configuration has been conceived in view of reducing both the global and the peak response. Especially on the latter task, the introduction of the active controller brings in a significant contribution. Prior, a Bounded-Input-Bounded-Output (BIBO) stability analysis on the control gains is developed. Different control laws have been investigated, assuming as primary structures, first a single-degree-of-freedom (SDOF) benchmark system and then a multi-degree-of-freedom (MDOF) building, in order to point out the most appropriate control law for the given structural context. In particular, a new control law, based on a linear combination of acceleration and velocity, allowed for remarkable peak response reduction. The achieved dynamic response exhibits a time settling weakly oscillating response, an indication of a stable behaviour, and therefore represents a suitable option for the active controller, in view of various engineering applications.

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“…To improve the performance of the passive vibration absorbers, many researchers investigated semi-active and active designs [40,41]. The semi-active absorbers have the capability of tuning their working resonant frequencies by adjusting the stiffness and/or damping of the absorbers.…”

Section: Introductionmentioning

confidence: 99%

Vibration Control Design for a Plate Structure with Electrorheological ATVA Using Interval Type-2 Fuzzy System

Lin¹,

Lee²,

Liu³

2017

Preprint

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This study presents a vibration control using actively tunable vibration absorbers (ATVA) to suppress vibration of a thin plate. The ATVA's is made of a sandwich hollow structure embedded with the electrorheological fluid (ERF). ERF is considered to be one of the most important smart fluids and it is suitable to be embedded in a smart structure due to its controllable viscosity property.ERF's apparent viscosity can be controlled in response to the electric field and the change is reversible in 10 microseconds. Therefore, the physical properties of the ERF-embedded smart structure, such as the stiffness and damping coefficients, can be changed in response to the applied electric field. A mathematical model is difficult to be obtained to describe the exact characteristics of the ERF embedded ATVA because of the nonlinearity of ERF's viscosity. Therefore, a fuzzy modeling and experimental validations of ERF-based ATVA from stationary random vibrations of thin plates are presented in this study. Because Type-2 fuzzy sets generalize Type-1 fuzzy sets so that more modelling uncertainties can be handled, a semi-active vibration controller is proposed based on Type-2 fuzzy sets. To investigate the different performances by using different types of fuzzy controllers, the experimental measurements employing type-1 fuzzy and interval type-2 fuzzy controllers are implemented by the Compact RIO embedded system. The fuzzy modeling framework and solution methods presented in this work can be used for design, performance analysis, and optimization of ATVA from stationary random vibration of thin plates.

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Recent Studies of Adaptive Tuned Vibration Absorbers/Neutralizers

Cited by 72 publications

References 63 publications

Experimental characterization of a nonlinear vibration absorber using free vibration

Experimental characterization of a nonlinear vibration absorber using free vibration

On the optimization of a hybrid tuned mass damper for impulse loading

Vibration Control Design for a Plate Structure with Electrorheological ATVA Using Interval Type-2 Fuzzy System

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