Vibration isolation support for processing equipment with quasi-zero stiffness effect on the base of air spring with rubber-cord shell

Bur’yan, Yu. A.; Silkov, M. V.; Zubarev, A. V.

doi:10.1063/1.5051863

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…Dalela et al 14 designed a single DOF vibration isolation system in the vertical direction by adopting the bistable chord beam as the negative stiffness mechanism, instead of the nonlinear diagonal spring. In addition, there are also negative stiffness mechanisms designed in combination with Euler buckling beams, 11,15 air springs, 16,17 bionic structures, [18][19][20] and composite structures, [21][22][23] which greatly increase the types of QZS isolators and make them truly applied to social life.…”

Section: Introductionmentioning

confidence: 99%

Design of a novel two-degree-of-freedom translational-rotation low-frequency vibration isolation platform

Wang,

Xin,

et al. 2024

Advances in Mechanical Engineering

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Multi-dimensional vibration isolation platforms often use parallel mechanisms to achieve multi-dimensional vibration isolation control. However, due to the high stiffness of the parallel mechanism, its own natural frequency is high, and it has good performance when applied to high-frequency vibration isolation, but it is hard to achieve low-frequency vibration isolation. This paper aims at the problem that the actual polishing and grinding equipment is often subjected to axial and circumferential low-frequency disturbances during operation, a novel C/2-(2-RRR) RR two-degree-of-freedom (2-DOF) translational-rotation low-frequency vibration isolation platform is proposed based on the singular configuration of planar 2-RRR mechanism. The coupling dynamic model of the vibration isolation platform is established, and the amplitude-frequency curve and force transmissibility curve are analyzed. The simulation analysis and prototype experiment are carried out by using the independent external excitation in both translational and rotational directions, and the corresponding linear system is compared to verify the effectiveness of the low-frequency vibration isolation of the two-degree-of-freedom vibration isolation platform.

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Section: Introductionmentioning

confidence: 99%

Design of a novel two-degree-of-freedom translational-rotation low-frequency vibration isolation platform

Wang,

Xin,

et al. 2024

Advances in Mechanical Engineering

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“…Одним из перспективных направлений развития виброзащитных систем в настоящее время выступает применение эффекта квазинулевой жесткости [20,21]. Применение данного эффекта позволяет более эффективно подавлять низкочастотные и сверхнизкочастотные колебания виброзащищаемой массы [22], которые характерны для динамических систем сидений операторов строительных, дорожных и подъемно-транспортных машин [20].…”

Section: Introductionunclassified

Quasi-zero rigidity condition for static force characteristic of parallelogram mechanism for seat vibration protection system

2022

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Introduction. Reducing vibration effects on machine operators is an urgent task; it allows to minimize the impact of vibrations on health, increase efficiency and attention. Accuracy and productivity can be improved. The problem of vibration protection is relevant for all types of machines, the working bodies of which interact with the soil and road surface. One of the impact reduction directions, along with vibration protection of cabs, is the development of vibration protection systems for operator seats. It is promising to use the effect of quasi-zero rigidity, which makes it possible to effectively damp low-frequency oscillations. For the proposed design based on a parallelogram mechanism, it is necessary to determine the condition for the horizontalness of the middle section of the static power characteristic.Materials and Methods. For the developed design scheme, using well-known power static and geometric relationships, novel analytical relationships between the parameters of the initial data and the vertical lifting force of the mechanism were derived. The initial parameters include the linear dimensions of the mechanism, the size of the quasi-zero rigidity zone, the weight of the chair with the operator, and the spring stiffness. When deriving analytical dependencies, the coordinates of the points of the mechanism moving and stationary relative to their own base were used.Results. The use of the developed analytical dependencies allows, for the given parameters of the initial data, to build a static power characteristic of the mechanism. The middle section of the characteristic is close to horizontal, but in general it is not horizontal. As an example, a static characteristic is given for a set of initial data values, the middle part of which is not horizontal. Equating the values of the vertical force of the mechanism at the left and right boundary points of the middle part of the characteristic made it possible to determine analytical dependences for ensuring quasi-zero rigidity.Discussion and conclusions. The obtained analytical expressions for ensuring the horizontalness of the middle section of the static power characteristic were verified. Applying the derived conditions decreases the number of parameters in the original data by one. An increase in the two dimensional parameters of the mechanism significantly reduces the required rigidity of the mechanism spring, which reduces the metal consumption.

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Support with quasi-zero stiffness effect for processing equipment

Burian

Silkov

Трифонова

2019

NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech

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Vibration isolation support for processing equipment with quasi-zero stiffness effect on the base of air spring with rubber-cord shell

Cited by 6 publications

References 3 publications

Design of a novel two-degree-of-freedom translational-rotation low-frequency vibration isolation platform

Design of a novel two-degree-of-freedom translational-rotation low-frequency vibration isolation platform

Quasi-zero rigidity condition for static force characteristic of parallelogram mechanism for seat vibration protection system

Support with quasi-zero stiffness effect for processing equipment

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