Analysis and design of a novel arrayed magnetic spring with high negative stiffness for low-frequency vibration isolation

Wu, Jiulin; Zeng, Lizhan; Han, Bin; Zhou, Yifan; Luo, Xichun; Li, Xiaoqing; Chen, Xuedong; Jiang, Wei

doi:10.1016/j.ijmecsci.2021.106980

Cited by 64 publications

(12 citation statements)

References 43 publications

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“…According to the model of magnetic charge [ 20 , 22 ], the stiffness of the magnetic spring can be obtained by Equation (4).

with

…”

Section: Theoretical Model and Methodsmentioning

confidence: 99%

“…Whereas, in the mechanical contact quasi-zero stiffness system, there is inevitably friction between contact pairs [ 17 ]. For these reasons, the magnetic quasi-zero stiffness has the characteristics of no friction, large load, and fast dynamic response [ 18 , 19 , 20 ], which provides a new idea for the constant supporting force with a heavy load, long stroke, and high precision in the vertical direction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Theoretical and Experimental Investigations on High-Precision Micro-Low-Gravity Simulation Technology for Lunar Mobile Vehicle

Hou

Hao²,

Wang³

et al. 2023

Sensors

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With the development of space technology, the functions of lunar vehicles are constantly enriched, and the structure is constantly complicated, which puts forward more stringent requirements for its ground micro-low-gravity simulation test technology. This paper puts forward a high-precision and high-dynamic landing buffer test method based on the principle of magnetic quasi-zero stiffness. Firstly, the micro-low-gravity simulation system for the lunar vehicle was designed. The dynamic model of the system and a position control method based on fuzzy PID parameter tuning were established. Then, the dynamic characteristics of the system were analyzed through joint simulation. At last, a prototype of the lunar vehicle’s vertical constant force support system was built, and a micro-low-gravity landing buffer test was carried out. The results show that the simulation results were in good agreement with the test results. The sensitivity of the system was better than 0.1%, and the constant force deviation was 0.1% under landing impact conditions. The new method and idea are put forward to improve the micro-low-gravity simulation technology of lunar vehicles.

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“…According to the model of magnetic charge [ 20 , 22 ], the stiffness of the magnetic spring can be obtained by Equation (4).

with

…”

Section: Theoretical Model and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Investigations on High-Precision Micro-Low-Gravity Simulation Technology for Lunar Mobile Vehicle

Hou

Hao²,

Wang³

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…These properties are determined by the special artificial structure rather than its material composition. In recent years, various metamaterials have developed rapidly, such as negative Poisson's ratio structures [5][6][7][8][9][10][11][12][13], lightweight high-strength structures [14][15][16][17] and negative stiffness (NS) structures [18][19][20][21][22][23][24][25][26][27]. * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

A self-recoverable negative stiffness metamaterial with enhanced bearing and energy dissipation capacity

Lv,

Li,

Ren

2024

Smart Mater. Struct.

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Because of their desirable properties, mechanical metamaterials have drawn increasing attention. Negative stiffness (NS) metamaterials can be used as reusable energy dissipation devices, but they usually have low bearing capacity. In this study, a self-recoverable NS structure with enhanced bearing and energy dissipation capacity was proposed. It breaks free from the size limitations of curved beams or thin rods, and can have high bearing and energy dissipation capacity through the mutual extrusion and friction between the snap plug and the layered snap groove. The mechanical properties of the proposed NS structure were studied by finite element analysis (FEA) and experiments. The reusability of the structure was verified by cyclic loading experiments. The results show that compared with the traditional curved beam NS structure and the previously self-recoverable NS structure, the bearing and energy dissipation capacity of the proposed structure have been greatly improved.

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“…Furthermore, they established an analytical model based on the filament method to quantitatively study the factors affecting electromagnetic force and stiffness characteristics. Wu et al [ 15 ] established the stiffness analytical model of negative stiffness array magnetic spring based on the magnetic charge model and validated the results via static experiments. Li et al [ 16 ] proposed an improved current filament method, which uses the equivalent circuit principle and considers the skin effect to improve the model’s accuracy by calculating the current of the electromagnetic forming coil and the electromagnetic force of the workpiece.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristic Analysis of a Toothed Electromagnetic Spring Based on the Improved Bouc—Wen Model

et al. 2023

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Electromagnetic spring active isolators have attracted extensive attention in recent years. The standard Bouc–Wen model is widely used to describe hysteretic behavior but cannot accurately describe asymmetric behavior. The standard Bouc–Wen model is improved to better describe the dynamic characteristic of a toothed electromagnetic spring. The hysteresis model of toothed electromagnetic spring is established by adding mass, damping, and asymmetric correction terms with direction. Subsequently, the particle swarm optimization algorithm is used to identify the parameters of the established model, and the results are compared with those obtained from the experiment. The results show that the current has a significant impact on the dynamic curve. When the current increases from 0.5 A to 2.0 A, the electromagnetic force sharply increases from 49 N to 534 N. Under different excitations and currents, the residual points predicted by the model proposed in this work fall basically in the horizontal band region of −20–20 N (for an applied current of 1.0 A) and −40–80 N (for an application of 4.5 mm/s). Furthermore, the maximum relative error of the model is 12.75%. The R2 of the model is higher than 0.98 and the highest value is 0.9993, proving the accuracy of the established model.

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Analysis and design of a novel arrayed magnetic spring with high negative stiffness for low-frequency vibration isolation

Cited by 64 publications

References 43 publications

Theoretical and Experimental Investigations on High-Precision Micro-Low-Gravity Simulation Technology for Lunar Mobile Vehicle

Theoretical and Experimental Investigations on High-Precision Micro-Low-Gravity Simulation Technology for Lunar Mobile Vehicle

A self-recoverable negative stiffness metamaterial with enhanced bearing and energy dissipation capacity

Dynamic Characteristic Analysis of a Toothed Electromagnetic Spring Based on the Improved Bouc—Wen Model

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