Stiff and soft active control of friction by vibrations and their energy efficiency

Benad, Justus; Попов, М. В.; Nakano, Ken; Popov, Valentin L.

doi:10.1007/s10010-018-0281-1

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…( 16)). This is the fundamental mechanism of the YAM method to stabilize the sliding system, which is strongly related to the in-plane rotation of the frictional force vector [8,9]. Fig.…”

Section: Stability Mapsmentioning

confidence: 99%

Mechanical Structure Design to Avoid Friction-Induced Instabilities: In-Plane Anisotropy and in-Plane Asymmetry

Nakano

Kado²,

Tadokoro³

et al. 2019

FU Mech Eng

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The stability of a two-degree-of-freedom (2DOF) sliding system with the velocity-weakening friction was examined by the eigenvalue analysis, where the in-plane anisotropy and the in-plane asymmetry were considered. The obtained eigenvalues were organized by using the minimum modal damping ratio as the stability maps. Selecting a stable point in the stability map corresponds automatically to embedding the Yaw-Angle-Misalignment (YAM) method in the mechanical structure design to avoid the instability. If we accept the mechanical structure design of sliding systems with the in-plane anisotropy and the in-plane asymmetry, we can find new stable conditions spread widely in the two-dimensional space, which are invisible from the conventional point of view.

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“…( 16)). This is the fundamental mechanism of the YAM method to stabilize the sliding system, which is strongly related to the in-plane rotation of the frictional force vector [8,9]. Fig.…”

Section: Stability Mapsmentioning

confidence: 99%

Mechanical Structure Design to Avoid Friction-Induced Instabilities: In-Plane Anisotropy and in-Plane Asymmetry

Nakano

Kado²,

Tadokoro³

et al. 2019

FU Mech Eng

Self Cite

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“…It is technically feasible through various means, e.g., the effective time-averaged dry friction force can be dynamically reduced by exciting high-frequency vibrations in the contact zone between the object to be transported and the platform. It was demonstrated by numerous scientists [44][45][46][47][48][49][50] that high-frequency vibrations cause a reduction in the effective timeaveraged friction force. The friction force can also be controlled by periodically increasing the normal force by using pneumatic suction forces.…”

Section: Introductionmentioning

confidence: 99%

Vibrational Transportation on a Platform Subjected to Sinusoidal Displacement Cycles Employing Dry Friction Control

Kilikevičius

Fedaravičius

2021

Sensors

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Currently used vibrational transportation methods are usually based on asymmetries of geometric, kinematic, wave, or time types. This paper investigates the vibrational transportation of objects on a platform that is subjected to sinusoidal displacement cycles, employing periodic dynamic dry friction control. This manner of dry friction control creates an asymmetry, which is necessary to move the object. The theoretical investigation on functional capabilities and transportation regimes was carried out using a developed parametric mathematical model, and the control parameters that determine the transportation characteristics such as velocity and direction were defined. To test the functional capabilities of the proposed method, an experimental setup was developed, and experiments were carried out. The results of the presented research indicate that the proposed method ensures smooth control of the transportation velocity in a wide range and allows it to change the direction of motion. Moreover, the proposed method offers other new functional capabilities, such as a capability to move individual objects on the same platform in opposite directions and at different velocities at the same time by imposing different friction control parameters on different regions of the platform or on different objects. In addition, objects can be subjected to translation and rotation at the same time by imposing different friction control parameters on different regions of the platform. The presented research extends the classical theory of vibrational transportation and has a practical value for industries that operate manufacturing systems performing tasks such as handling and transportation, positioning, feeding, sorting, aligning, or assembling.

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“…In order to obtain a first qualitative and quantitative understanding of the measuring device, we begin in the present investigation with a simplified model of only one of these rheological elements consisting of a single spring and a single damper to model the contact. In this approach, we follow the recent works of Popov (2016), Mao et al (2017) and Benad et al (2018) in which the influence of oscillations on friction is investigated. It will be shown that many characteristic features of the system studied in the present paper show already with such a simplified oneelement model.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Dynamic Response of Rubber in Frictional Contact

et al. 2019

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In the present work, we analyze a device for measuring the dynamic response of rubber in sliding contact. The principle of the device is to measure excited oscillations of a mechanical system with a sliding contact between a rubber roller and a rigid surface. Depending on the contact properties, varying oscillation amplitudes are measured. The goal is to determine dynamic response properties of rubber from oscillating tests. For this sake, an analytical model is introduced in which the contact problem and system dynamics are considered in detail. Analytical and numerical results obtained for this model are compared with some experimental data and discussed both on a qualitative and quantitative level.

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Stiff and soft active control of friction by vibrations and their energy efficiency

Cited by 5 publications

References 23 publications

Mechanical Structure Design to Avoid Friction-Induced Instabilities: In-Plane Anisotropy and in-Plane Asymmetry

Mechanical Structure Design to Avoid Friction-Induced Instabilities: In-Plane Anisotropy and in-Plane Asymmetry

Vibrational Transportation on a Platform Subjected to Sinusoidal Displacement Cycles Employing Dry Friction Control

Investigation on Dynamic Response of Rubber in Frictional Contact

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