Zero Torque Compliant Mechanisms Employing Pre-buckled Beams

Bilancia, Pietro; Smith, Samuel P.; Berselli, Giovanni; Magleby, Spencer P.; Howell, Larry L.

doi:10.1115/1.4046810

Cited by 17 publications

(2 citation statements)

References 47 publications

(91 reference statements)

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“…18. In [49,50] such Pre-compressed Beams were designed to get a compliant CTM. The design was done using finite element software where some input parameters have to be chosen (material, width of the beams, allowed axial compression of the initial beam, the desired rotation angle of the CTM and the inclination angle between the beam and the in-and output rings) such that the design parameters of the pre-compressed beam are generated considering the stress limits.…”

Section: Pre-compressed Beam Mechanismsmentioning

confidence: 99%

Constant Torque Mechanisms: A Survey

Saerens

Furnémont

Legrand

et al. 2022

Applied Mechanics Reviews

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In this paper an overview is given of all types of constant torque mechanisms (CTMs) based on both function and structure. Based on their architecture they can be divided into five distinct categories which all have their specific behaviour. It is also shown that these CTMs can be divided into two application types, namely power assistance or torque stabilization. Due to the fact that in research mainly constant force mechanisms (CFMs) have been tackled, also some explanation is given on how CFMs can be transformed into CTMs. It is also shown that some of these CTMs have a very high specific energy which can make that they have potential application as energy storage/power provider in novel fields like robotics where they have almost not been used yet.

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Section: Pre-compressed Beam Mechanismsmentioning

confidence: 99%

Constant Torque Mechanisms: A Survey

Saerens

Furnémont

Legrand

et al. 2022

Applied Mechanics Reviews

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“…Zhang et al (2019) proposed an integrated bidirectional torsional negative stiffness mechanism, which realized energy balance by coupling a negative stiffness unit with a positive system. The negative torsional stiffness provided by pre-compressed cam-roller mechanisms (Zhou et al, 2015; Zhang et al, 2020) and pre-buckling beams (Bilancia et al, 2020) were designed and discussed in literature.…”

Section: Introductionmentioning

confidence: 99%

Vibration isolation performance of a beam clamped with torsional quasi-zero-stiffness isolator

Tian

Zhang

Chen

et al. 2023

Journal of Vibration and Control

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Elastic beam structures connected by hinges are a common basic component of many mechanical systems. In this study, the nonlinear transverse vibration of a beam with one end free and the other end simply supported with a torsion spring is investigated. A torsional quasi-zero-stiffness vibration isolator is employed at the fixed end of the beam for isolating the vibration excitation from the base. Using Hamilton’s principle, the differential equation of motion for the transverse vibration of the beam is obtained, and the natural characteristics of the beam are determined. The dynamic equation of the system is derived by using Galerkin truncation method and the harmonic balance method is adopted to obtain the nonlinear vibration response. Compared with the vibration transmissibility of the beam supported by the equivalent linear torsion spring, the quasi-zero-stiffness vibration isolation system shows superior vibration isolation performance. It is found that the beam fixed with a torsional quasi-zero-stiffness isolator can reduce the first resonant frequency and provide a wide effective isolation range at low frequency, which is rarely affected by the strong nonlinearity. The results would provide an innovative method of introducing the torsional quasi-zero-stiffness isolator into the passive vibration control of continuum system.

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