A tristable compliant micromechanism with two serially connected bistable mechanisms

Wang, Dung-An; Chen, Jyun-Hua; Pham, Huy-Tuan

doi:10.1016/j.mechmachtheory.2013.08.018

Cited by 13 publications

(3 citation statements)

References 23 publications

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“…This widespread mechanism has been employed to design actuators with several stable positions. Among these mechanisms, we find tristable [27][28][29][30][31], quadristable [32,33] and pentastable designs. In the other hand, few unlimited multistable mechanisms are presented in the literature.…”

Section: Introductionmentioning

confidence: 97%

Design and fabrication of novel discrete actuators for microrobotic tasks

Hussein¹,

Bouhadda²,

Mohand-Ousaid³

et al. 2018

Sensors and Actuators A: Physical

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This paper presents a compliant monolithic multistable actuator which is able to switch its moving part between several stable positions linearly in one dimensional direction. The number of stable positions can be increased by extending the range of displacement of the moving part. The transition in each step of displacement is made to the nearest stable position in the direction of motion. Upward and downward steps are made by a specific sequence of moving, using a bistable module, opening and closing two internal clamps which are actuated by U-shaped electrothermal actuator using three subsystems. The principle and the design of each subsystem in the discrete acruator, fabrication process and experimental results are presented. The fabricated prototypes of the discrete actuator showed a proper functioning. The mean achieved displacement is 120.67±0.08 µm over 12 upward steps with a mean step of 10.06 µm, which is very close to the designed performance.

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Section: Introductionmentioning

confidence: 97%

Design and fabrication of novel discrete actuators for microrobotic tasks

Hussein¹,

Bouhadda²,

Mohand-Ousaid³

et al. 2018

Sensors and Actuators A: Physical

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“…Furthermore, the redundant geometric parameter of curvature can extend the design domain. Due to these advantages, all kinds of precision positioners, 15,16 microgrippers, 17 vibration suppression devices, 18 constant force mechanisms, 19,20 multistable mechanisms, 21–24 flexure pivots, 25 morphing wings, 26 metamaterials, 27 microelectro mechanical systems, 28,29 and sensors 30,31 have been developed based on compliant mechanisms including curved flexure beams.…”

Section: Introductionmentioning

confidence: 99%

“…The pseudo-rigidbody model, [32][33][34][35][36][37][38][39] the beam constraint model, 40 and other methodologies [41][42][43] have been used for the kinetostatic analysis of large-deformation compliant mechanisms with curved flexure beams. Although small-deformation compliant mechanisms with serial-parallel configurations and curved flexure beams have been widely applied in precision and other engineering fields, [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] their dynamic design is still challenging (see Figure 1). Some powerful methods, such as the displacement matrix method, the dynamic stiffness matrix method, and Ryu's method, have been used to formulate the linear kinetostatics and dynamics of compliant mechanisms including curved flexure hinges/beams by dividing them into a number of straight beam elements.…”

mentioning

confidence: 99%

Enabling the transfer matrix method to model serial–parallel compliant mechanisms including curved flexure beams

Ling,

Yuan,

Zeng

et al. 2024

Int Journal of Mech Sys Dyn

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Compliant mechanisms with curved flexure hinges/beams have potential advantages of small spaces, low stress levels, and flexible design parameters, which have attracted considerable attention in precision engineering, metamaterials, robotics, and so forth. However, serial–parallel configurations with curved flexure hinges/beams often lead to a complicated parametric design. Here, the transfer matrix method is enabled for analysis of both the kinetostatics and dynamics of general serial–parallel compliant mechanisms without deriving laborious formulas or combining other modeling methods. Consequently, serial–parallel compliant mechanisms with curved flexure hinges/beams can be modeled in a straightforward manner based on a single transfer matrix of Timoshenko straight beams using a step‐by‐step procedure. Theoretical and numerical validations on two customized XY nanopositioners comprised of straight and corrugated flexure units confirm the concise modeling process and high prediction accuracy of the presented approach. In conclusion, the present study provides an enhanced transfer matrix modeling approach to streamline the kinetostatic and dynamic analyses of general serial–parallel compliant mechanisms and beam structures, including curved flexure hinges and irregular‐shaped rigid bodies.

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