Design and Analysis of Electromagnetic Quasi-zero Stiffness Vibration Isolator

MengTong, Wang; Pan, Su; Liu, Shuyong; Chai, Kai; Wang, Boxiang; Jinfang, Lu

doi:10.1007/s42417-022-00569-x

Cited by 9 publications

(3 citation statements)

References 10 publications

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“…Xie et al 29 proposed an MQZS vibration isolator with an air spring, coils, and a ring magnet. Wang et al 30 constructed an MQZS vibration isolator by using an electromagnet combined with a CAM structure to generate negative stiffness. Wu et al 31 designed a magnetic low‐frequency vibration isolator using multiple cuboid magnet arrays.…”

Section: Introductionmentioning

confidence: 99%

Three‐magnet‐ring quasi‐zero stiffness isolator for low‐frequency vibration isolation

Wang,

Hou,

Meng

et al. 2024

Int Journal of Mech Sys Dyn

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A three‐magnet‐ring quasi‐zero stiffness (QZS‐TMR) isolator is designed to solve the problem of low‐frequency vibration isolation in the vertical direction of precision equipment. QZS‐TMR has both positive and negative stiffness structures. The positive stiffness structure consists of two mutually repelling magnetic rings and the negative stiffness structure consists of two magnetic rings nested within each other. By modulating the relative distance between positive and negative stiffness structures, the isolator can have QZS characteristics. Compared with other QZS isolators, the QZS‐TMR is compact and easy to manufacture. In addition, the working load of QZS‐TMR can be flexibly adjusted by varying the radial widths of the inner magnetic ring. In this paper, the static analysis of QZS‐TMR is carried out to guide the design, and the low‐frequency vibration isolation performance is studied. In addition, the experimental prototype of QZS‐TMR is designed and manufactured. The static and vibration isolation experiments are carried out on the prototype. The results show that the initial vibration isolation frequency of the experimental prototype is about 4 Hz. The results show an excellent low‐frequency vibration isolation effect, which is consistent with the theoretical research. This paper introduces a new approach to the design of the QZS isolator.

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Section: Introductionmentioning

confidence: 99%

Three‐magnet‐ring quasi‐zero stiffness isolator for low‐frequency vibration isolation

Wang,

Hou,

Meng

et al. 2024

Int Journal of Mech Sys Dyn

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“…14 To realize the stiffness characteristics of high static and low dynamic, Wang designed a quasi-zero stiffness vibration isolator in the form of Maxwell's electromagnetic force and mechanical spring in parallel, and analyzed the expression of electromagnetic force and dynamics of the system. 15 Gao proposed a pneumatic near-zero frequency vibration isolator, which contained two important ele-ments: gas and liquid. In addition, Gao established a mixed pneumatic dynamic model and verified the performance of large load and low-frequency vibration isolation.…”

Section: Introductionmentioning

confidence: 99%

Dynamics and Stability of Magnetic-Air Hybrid Quasi-Zero Stiffness Vibration Isolation System

Jiang¹,

Song²,

Ma³

et al. 2023

The International Journal of Acoustics and Vibration

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With the improvement of machining accuracy, external low frequency vibration has become one of the most important factors affecting the performance of equipment. The theory of quasi-zero stiffness vibration isolation shows favorable low frequency vibration isolation effect. However, the theory, mechanical properties and dynamics of the system still need to be studied and expanded. Based on our previous research on the structure of a magnetic-air hybrid quasi-zero stiffness vibration isolation system, the nonlinear mechanical expression of positive and negative stiffness structure has been analyzed in this paper, to improve application of the system and provide a theoretical basis for sequential studies of active control. To provide the judgment criteria and basis for the application of quasi-zero stiffness, a more accurate quasi-zero stiffness mechanical model was to be established, and the judgement criterion and stability of quasi-zero stiffness was to be discussed and analyzed. Then, the dynamical model based on external low frequency vibration was developed, to investigate the stability and natural frequency. At the same time, the influence of different feedback parameters on the amplitude frequency characteristics has been discussed, which provides a basis for the future study of active control. Finally, we carried out simulation and experimental analysis to verify the stiffness of high static and low dynamic and the low frequency vibration isolation effect of the vibration isolation system.

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“…Yuan et al designed a tunable QZS isolator with a long working stroke for improving the isolation performance under violent vibration conditions [28]. In [29], an electromagnetic QZS vibration isolator was designed by connecting the negative stiffness electromagnetic spring and the linear positive stiffness spring in parallel.…”

Section: Introductionmentioning

confidence: 99%

Design and performance analysis of an adjustable quasi-zero-stiffness isolator with four parallel springs for different loads

Ju,

Ji,

Liu

2023

Preprint

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Aiming at the problem that the vibration isolation performance of existing quasi-zero-stiffness isolators will be weakened under varying load conditions, an adjustable four-spring parallel quasi-zero-stiffness isolator (FPQZSI) is proposed by introducing the tilt linkage, which can actively adapt to load changes by adjusting the angle between the tilt linkage and the horizontal plane. The FPQZSI consists of a vertical spring that provides positive stiffness and three tilt springs, installed on the tilt linkages, that provide negative stiffness. According to the static equilibrium relationship, the conditions that the FPQZSI has zero stiffness at the equilibrium position are obtained. Then, the optimal structure parameters of the FPQZSI are determined based on maximizing the system quasi-zero-stiffness interval, and the quantitative relationship between the angles of the tilt linkage and the load mass is investigated. Furthermore, a unified dynamic equation for the FPQZSI under varying load conditions is established. The influences of the device structural parameters, the tilt linkage angle, and the load mass on the vibration response and displacement transmission characteristics of the FPQZSI are analyzed by using the harmonic balance method. The results indicate that by actively adjusting the tilt linkage angle, the designed FPQZSI can ensure good vibration isolation performance under varying load conditions.

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Design and Analysis of Electromagnetic Quasi-zero Stiffness Vibration Isolator

Cited by 9 publications

References 10 publications

Three‐magnet‐ring quasi‐zero stiffness isolator for low‐frequency vibration isolation

Three‐magnet‐ring quasi‐zero stiffness isolator for low‐frequency vibration isolation

Dynamics and Stability of Magnetic-Air Hybrid Quasi-Zero Stiffness Vibration Isolation System

Design and performance analysis of an adjustable quasi-zero-stiffness isolator with four parallel springs for different loads

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