Z-Damper: A New Paradigm for Attenuation of Vibrations

Pérez-Díaz, José-Luis; Valiente-Blanco, Ignacio; Cristache, Cristian

doi:10.3390/machines4020012

Cited by 19 publications

(12 citation statements)

References 12 publications

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“…Linear magnetic gears are devices able to amplify the displacement of any oscillating mechanical element [10]. As they are the linear version of rotational magnetic gear [11] they are also expected to inherit their interesting properties like not needing lubrication, zero backlash, large temperature range, and long working life [12].…”

Section: Physics Of the -Transmittermentioning

confidence: 99%

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Mechanical Impedance Matching Using a Magnetic Linear Gear

Valiente–Blanco¹,

Cristache²,

Sanchez-Garcia-Casarrubios³

et al. 2017

Shock and Vibration

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As part of the Fp7 Clean Sky Project, a linear magnetic gear prototype, called -transmitter, for aerospace application was designed, built, and tested. It demonstrates a maximum force capacity of 4700 N at 25 ∘ C and 4500 N at 90 ∘ C. Force ratio between slow and fast stages remains constant and equal to the design value: 7.0. The behavior of the real -transmitter as a mechanical impedance matching device when any stiffness is attached to the fast stage including the limit cases of a blocked fast stage or a free to move fast stage is experimentally explored. Although the real -transmitter deviates from the ideal, frictionless and massless, device, it still provides an impedance matching effect large enough to potentially become an extremely useful technology for vibration control when combined with other elements such as dampers, springs, or active elements.

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Section: Physics Of the -Transmittermentioning

confidence: 99%

“…Some of us [10] suggested that linear magnetic gears can provide mechanical impedance matching of a vibration control device, that is, a damper, an active actuator, or a tuned vibration absorber, and be used to multiply its effect in the same way that electrical transformers are used in electrical engineering.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Impedance Matching Using a Magnetic Linear Gear

Valiente–Blanco¹,

Cristache²,

Sanchez-Garcia-Casarrubios³

et al. 2017

Shock and Vibration

Self Cite

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“…It is easy to anticipate the major step forward that contactless technology can bring to common industrial applications. For instance, one of the most important breakthroughs would be the reduction of noise and vibration in aerospace applications [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Aeronautical Magnetic Torque Limiter for Passive Protection against Overloads

Cristache¹,

Díez-Jiménez²,

Valiente-Blanco³

et al. 2016

Machines

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Actual aerospace and defense technologies present multiple limitations that need to be overcome in order to evolve to less contaminating and more efficient aircraft solutions. Contactless technologies come with essential advantages such as the absence of wear and friction. This work describes the design, prototype, and performance test according to RTCA-DO-160 of an aeronautical magnetic torque limiter. The results show correct continuous transmission operation (2250 rpm and 24 Nm) from −50 • C to +90 • C. Moreover, overload protection has been demonstrated for more than 200 jamming events without damage or required maintenance to the device.

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“…Due to the controllable and varied physical properties of smart materials, they are also used for living infrastructures, mechanical structures, and seismic vibration controls for decades . Smart materials and structures that possess electromechanical characteristics have been widely used for active vibration control or semi-active vibration control, such as piezoelectric damper [4][5][6][7][8], eddy current damper [9], magnetostrictive spring [10], magneto-rheological fluid (MRF) damper [11][12][13], electro-rheological fluid (ERF) damper [14][15][16][17], shape memory alloy (SMA) [18][19][20][21], and electromagnetic and piezoelectric shunt damper [22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Smart materials have one or more properties changed by the external stimuli, such as temperature, stress, electric field or magnetic field.…”

Section: Introductionmentioning

confidence: 99%

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

2017

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This study presents vibration control using actively tunable vibration absorbers (ATVA) to suppress vibration of a thin plate. The ATVA is made of a sandwich hollow structure embedded with 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 rheological 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 coefficient, 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 modeling 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 both 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 varying harmonic vibration of thin plates.

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Z-Damper: A New Paradigm for Attenuation of Vibrations

Cited by 19 publications

References 12 publications

Mechanical Impedance Matching Using a Magnetic Linear Gear

Mechanical Impedance Matching Using a Magnetic Linear Gear

Aeronautical Magnetic Torque Limiter for Passive Protection against Overloads

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

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