Semi-active linear vacuum packed particles damper

Zalewski, Robert; Chodkiewicz, Paweł

doi:10.15632/jtam-pl.54.1.311

Cited by 12 publications

(12 citation statements)

References 8 publications

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“…An additional advantage of structures based on VPPs is that they can be customized to various external shapes. When the zero value underpressure (atmospheric pressure) is generated inside the system, VPPs can be treated as a kind of nonclassical plasticine, which easily allows the user to form any external shapes with it [ 17 , 21 ].…”

Section: Vacuum Packed Particlesmentioning

confidence: 99%

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Innovative Controllable Torsional Damper Based on Vacuum Packed Particles

Rodak

Zalewski

2020

Materials

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In this paper a new concept of a controllable granular damper is presented. The introduced prototype works based on so-called vacuum packed particles (VPPs). Such structures are made of granular materials located in a soft and hermetic encapsulation. As a result of generating a partial vacuum inside the system, the structure starts to behave like a nonclassical solid body. The global physical (mechanical) features of VPPs depend on the level of internal underpressure. The introduced prototype of a controllable torsional damper exhibits various dissipative properties as a function of internal underpressure. The design details of the investigated device are presented. Basic laboratory tests results are discussed. To describe the hysteretic behavior of the device, the Bouc–Wen rheological model has been modified and adopted. Nonlinear functions of underpressure have been introduced to the initial model formulation. The developed Bouc–Wen model has been applied to capture the real response of the VPP torsional damper prototype.

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Section: Vacuum Packed Particlesmentioning

confidence: 99%

“…It is also possible to find an application of VPPs as a linear damper of symmetrical and nonsymmetrical characteristics. According to the solution discussed in [ 21 ], the linear VPP vibration attenuator has a cylindrical shape. The single granular core is placed inside a steel spring that provides stiffness to the system.…”

Section: Vacuum Packed Particlesmentioning

confidence: 99%

Innovative Controllable Torsional Damper Based on Vacuum Packed Particles

Rodak

Zalewski

2020

Materials

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“…The possibility to actively and quickly control the mechanical properties of VPP dampers makes it possible to adjust their design to various specific applications, e.g., cf. dampers with VPP core and springs [9,10], or the engineering problem to damp beam vibrations [1,2,11,12]. Vacuum Packed Particles were also used to damp vibrations in automobile industries.…”

Section: Fig 1 Vpp Testing Specimenmentioning

confidence: 99%

Discrete element method approach to modelling VPP dampers

2018

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Abstract. In this paper, we present a novel approach to modeling and analysis of Vacuum Packed Particle dampers (VPP dampers) with the use of Discrete Element Method (DEM). VPP dampers are composed of loose granular medium encapsulated in a hermetic envelope, with controlled pressure inside the envelope. By changing the level of underpressure inside the envelope, one can control mechanical properties of the system. The main novelty of the DEM model proposed in this paper is the method to treat special (pressure) boundary conditions at the envelope. The model has been implemented within the open-source Yade DEM software. Preliminary results are presented and discussed in the paper. The qualitative agreement with experimental results has been achieved.

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“…Large variety of shockabsorbers' applications leads to numerous technical solutions, which differ from each other in terms of construction, involved physical phenomena and complexity of control system. At present, more and more frequent practice is the use of so-called smart devices, which are based on functional materials and advanced control systems, e.g., magneto-rheological energy absorbers [12][13][14][15], electro-rheological dampers [16,17], particle impact dampers [18,19], or pneumatic adaptive absorbers with piezoelectric valves [20]. Simultaneously, advances in the development of…”

Section: Introductionmentioning

confidence: 99%

Identification-based predictive control of semi-active shock-absorbers for adaptive dynamic excitation mitigation

Graczykowski

Faraj

2020

Meccanica

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The paper is aimed at detailed discussion of the Identification-based Predictive Control (IPC) developed for semi-active fluid-based shock-absorbers which protect structures and machines against impact excitations. The problem addressed is the optimal impact absorption providing adaptive mitigation of dynamic response of the mechanical system. The goal of applied control is dissipation of the entire impact energy and minimization of the impacting object deceleration during the process. Three proposed implementations of the IPC are based on sequentially repeated procedures, which include identification of excitation parameters and calculation of the valve opening providing minimization of tracking error of the optimal path. The presented numerical examples concerning mitigation of the dynamic excitation acting on the double-chamber pneumatic shock-absorber reveal high efficiency and prove robustness of the proposed control methods. The developed algorithms are compared against each other in terms of path-tracking efficiency and character of required control actions. The most important challenges in practical implementation of the proposed methods are indicated.

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Semi-active linear vacuum packed particles damper

Cited by 12 publications

References 8 publications

Innovative Controllable Torsional Damper Based on Vacuum Packed Particles

Innovative Controllable Torsional Damper Based on Vacuum Packed Particles

Discrete element method approach to modelling VPP dampers

Identification-based predictive control of semi-active shock-absorbers for adaptive dynamic excitation mitigation

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