Theoretical analysis of a non-contact spring with inclined permanent magnets for load-independent resonance frequency

Robertson, William S. P.; Cazzolato, B.; Zander, Anthony C.

doi:10.1016/j.jsv.2011.11.011

Cited by 23 publications

(10 citation statements)

References 11 publications

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“…Tokios sistemos yra labai patikimos ir saugios dėl sąlyginio paprastumo. Minėtos savybės ir skatina inžinierius bei mokslininkus kurti įvairių konstrukcijų vibroizoliacinius elementus su pastoviais magnetais (Puppin, Fratello 2002;Choi et al 2003;Robertson et al 2012).…”

Section: įVadasunclassified

Investigation of Magnetic Vibro-Isolating Support / Magnetinės Vibroizoliacinės Atramos Tyrimai

Gedvila

Mokšin

2016

Mokslas – Lietuvos Ateitis

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The load carrying capacity of designed self-centring permanent magnet based vibro-isolating support is analysed in the article. COMSOL MultiphysicsÒ modelling software was used for nu-merical simulation. Results are presented as repulsion force ver-sus support cap displacement graph as well as magnetic flux density distribution graphs. Repulsion force was also measured experimentally. It is established that differences between numeri-cally and experimentally obtained force values are only about 2–8%. It is established that maximum normal load force of the support can’t exceed 150 N. It is also established that near-zero stiffness of the support is achieved in case of approximately 70 N normal load force. Straipsnyje pateikiami suprojektuotos savaime centruojančios vibroizoliacinės atramos su pastoviais magnetais apkrovimo gebos eksperimentinių ir skaitmeninių tyrimų rezultatai. Skaitmeninis atramos modeliavimas buvo atliktas naudojant COMSOL Multiphysics@ programinę įrangą. Modeliavimo rezultatai pateikti kaip stūmos jėgos priklausomybės nuo atramos dangčio poslinkio grafikai, taip pat kaip magnetinio srauto tankio pasiskirstymo atramoje grafikai. Stūmos jėga buvo taip pat matuojama eksperimentiškai. Nustatyta, kad skirtumai tarp stūmos jėgos reikšmių, gautų modeliuojant ir matuojant, sudaro tik 2–8 %. Nustatyta, kad magnetinė atrama gali būti apkrauta ne didesne kaip 150 N jėga. Taip pat nustatyta, kad nulinis sistemos standumas pasiekiamas tuo atveju, kai atramos apkrovimo jėga sudaro apie 70 N.

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Section: įVadasunclassified

Investigation of Magnetic Vibro-Isolating Support / Magnetinės Vibroizoliacinės Atramos Tyrimai

Gedvila

Mokšin

2016

Mokslas – Lietuvos Ateitis

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“…However, the system structure will be very complex if air bearings are used in some measuring or machining equipment requiring a high vacuum condition [3], such as extreme ultraviolet lithography. In contrast, owing to the advantages of no mechanical contact, vacuum compatibility (no need of liquid or gas auxiliary equipment) and low natural frequency, passive magnetic levitation vibration isolators have drew increased interest in recent years [4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Research on typical topologies of a tubular horizontal-gap passive magnetic levitation vibration isolator

et al. 2017

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Abstract. Magnetic levitation vibration isolators have attracted more and more attention in the field of high-precision measuring and machining equipment. In this paper, we describe a tubular horizontal-gap passive magnetic levitation vibration isolator. Four typical topologies of the tubular horizontal-gap passive magnetic levitation vibration isolator are proposed. The analytical expression of magnetic force is derived. The relationship between levitation force, force density, force ripple and major structural parameters are analysed by finite element method, which is conductive to the design and optimization of the tubular horizontal-gap passive magnetic levitation vibration isolator. The force characteristics of different topologies of the tubular horizontal-gap passive magnetic levitation vibration isolator are compared and evaluated from the aspect of force density, force ripple and manufacturability. In comparison with conventional passive magnetic levitation vibration isolators, the proposed tubular horizontal-gap passive magnetic levitation vibration isolator shows advantage in higher force density.

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“…Up to now, there are a number of strategies to control the response of a system such as passive control, active control, semi-active control and hybrid control [2][3][4][5][6]. To achieve perfect performance of a target system, the structures or mechanical systems should be designed to suit different types of loading, such as particularly dynamic and transient loads, and to obtain high static stiffness resulting in a small static deflection and a small dynamic stiffness resulting in a low natural frequency [7,8].…”

Section: Introductionmentioning

confidence: 99%

Periodic solution and bifurcation of a suspension vibration system by incremental harmonic balance and continuation method

Chen

2015

Nonlinear Dyn

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A compressed air generator hang under vehicle is simplified as a suspension mass connected to a vertical spring and two horizontal springs. It is configured generally as a geometrical negative stiffness to reduce dynamic stiffness. The periodic motion, chaotic motion and bifurcation of the compressed air generator model are investigated using the incremental harmonic balance method in combination with arc length continuation technique. The stability and bifurcation route are also distinguished with Floquet theory. The system exhibits a period doubling bifurcation route to chaos in different regions of excitation frequency. The stiffness ratio of the vertical spring and the horizontal spring has a significant influence on the dynamic response. When the vertical stiffness is close to the stiffness at horizontal direction, resonance occurs with the emergence of the chaotic motion. The dynamic response of the vibration system can be improved by reducing the stiffness in the horizontal direction to increase the stiffness ratio. L. Yuanping Key Lab of Disaster Forecast and Control in Engineering, Ministry of Education of the People'

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Theoretical analysis of a non-contact spring with inclined permanent magnets for load-independent resonance frequency

Cited by 23 publications

References 11 publications

Investigation of Magnetic Vibro-Isolating Support / Magnetinės Vibroizoliacinės Atramos Tyrimai

Investigation of Magnetic Vibro-Isolating Support / Magnetinės Vibroizoliacinės Atramos Tyrimai

Research on typical topologies of a tubular horizontal-gap passive magnetic levitation vibration isolator

Periodic solution and bifurcation of a suspension vibration system by incremental harmonic balance and continuation method

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