Dynamical switching of an electromagnetically driven compliant bistable mechanism

Wang, Dung-An; Pham, Huy-Tuan; Hsieh, Yi-Han

doi:10.1016/j.sna.2008.11.004

Cited by 34 publications

(17 citation statements)

References 27 publications

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“…(6) satisfies the key points of the bistable behavior accurately, but cannot describe the whole bistable behavior well. Wang et al (2009) used a ninth-order polynomial to model the nonlinear spring stiffness of the mechanism as Third, fifth, seventh, eighth and ninth-order polynomials have been used to model the highly nonlinear forcedisplacement curve. However, the curves generated by the polynomials with order less than nine do not fit the forcedisplacement curve well, as shown in Fig.…”

Section: Mathematical Representations Of Bistable Kinetostatic Behaviorsmentioning

confidence: 99%

A function for characterizing complete kinetostatic behaviors of compliant bistable mechanisms

Chen

2014

Mech. Sci.

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Abstract. In this paper, a straightforward and accurate numerical modeling (a rational function called "tri-root bistable function") are proposed to represent the complete nonlinear bistable force-displacement characteristics. The rational function has a cubic polynomial numerator and quadratic polynomial denominator. With three different kinds of compliant bistable mechanisms, the tri-root bistable function is proved effective and accurate, and that it is capable of capturing the key features of a bistable kinetostatic curve accurately with fewer parameters. Then, for the classic fully-compliant bistable mechanism, six closed-form equations are presented and used to describe the relationships between the tri-root bistable function parameters and the mechanism's design parameters, which are achieved using a multi-variable nonlinear regression. The regression analysis is validated by nonlinear finite element analysis. Finally, a fully-compliant statically balanced mechanism consisting of three different classic fully-compliant bistable mechanisms is illustrated to show the capability of the proposed method in designing compliant multi-stable mechanisms.

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Section: Mathematical Representations Of Bistable Kinetostatic Behaviorsmentioning

confidence: 99%

A function for characterizing complete kinetostatic behaviors of compliant bistable mechanisms

Chen

2014

Mech. Sci.

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“…With the concept of multistable mechanisms, a wide range of operating regimes or novel mechanical systems without undue power consumption can be created [1]. Substantial interest has focused on design of bistable [2][3][4][5][6][7][8][9] and tristable mechanisms [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A quadristable compliant mechanism with a bistable structure embedded in a surrounding beam structure

Pham

Wang

2011

Sensors and Actuators A: Physical

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“…As the mechanism is moved from its first stable position to its second stable position, it passes through an un-stable equilibrium position (Wilcox and Howell 2005). A primary advantage of a BM is that it only requires energy input to switch the mechanism from one state to the other, but input energy is not required to maintain the mechanism in either of the stable equilibrium positions (Wang et al 2009). This behavior of the BMs is of particular importance at the microlevel when power consumption and heat dissipation are often a major concern.…”

Section: Introductionmentioning

confidence: 99%

“…As one of the BM styles, magnet latching is gradually appearing in the world of MEMS actuators and power, particularly for applications such as micro switching devices (Wang et al 2009;Mardivirin et al 2009;Zhao et al 2010). Electromagnetic (Ruan et al 2001;Gray and Kohl 2006) actuation has many advantages over the electrostatic , piezoelectric (Mahameed et al 2008) and electrothermal (Nordquist et al 2009) actuation.…”

Section: Introductionmentioning

confidence: 99%

Modeling, microfabrication and experiments of a free–free cantilever bistable micro mechanism supported with a diamond configuration

Wang

Yan

et al. 2010

Microsyst Technol

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Bistable micro mechanisms are gaining great attention in MEMS applications. This paper presents the mechanical modeling and experimental characterization of a bistable torsion/cantilever micro latching mechanism for performing low power bistable relay applications. The bistable micro mechanism consists of two cantilevers which form symmetrical rocker levers. The free-free cantilever is suspended by a diamond skeleton which in turn is attached to a torsion cantilever. A permanent magnet is placed beside for holding the closed state with a permalloy soft magnetic circuit. The special diamond support is designed to enhance the stiffness of the overhang beams. In order to deduce the spring stiffness of system, a mechanical modeling of the leveraged torsion/cantilever system was performed by Castigliano's theorem. Meanwhile, the magnetostatic latching force was also deduced by the Maxwell electromagnetism theory. Then the device has been prepared by a laminated copper sacrificial layer process. This process can facilitate the fabrication complexities of traditional magnetic device with coil structures. Finally, mechanical performance was characterized by an atomic force microscopy, combined with finite element simulation using ANSYS TM package and analysis model as well. Two stable states of the micro mechanism were hold successfully with no power consumption by interferoscope profilometry of WYKO optical profiling system.

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Dynamical switching of an electromagnetically driven compliant bistable mechanism

Cited by 34 publications

References 27 publications

A function for characterizing complete kinetostatic behaviors of compliant bistable mechanisms

A function for characterizing complete kinetostatic behaviors of compliant bistable mechanisms

A quadristable compliant mechanism with a bistable structure embedded in a surrounding beam structure

Modeling, microfabrication and experiments of a free–free cantilever bistable micro mechanism supported with a diamond configuration

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