Generalized constitutive equations for piezo-actuated compliant mechanism

Cao, Junyi; Ling, Mingxiang; Inman, Daniel J.; Lin, Jin

doi:10.1088/0964-1726/25/9/095005

Cited by 31 publications

(13 citation statements)

References 29 publications

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“…Others [81,[189][190][191][192] displacements coincide with the points of actuation force in the above investigations [198][199][200][201][202][203][204][205]. The modeling procedure will become more complicated with multiple actuation forces, and when the solved displacement is not coincident with the points of actuation force.…”

Section: Rhombicmentioning

confidence: 89%

“…The compliance matrix method can be recognized as an efficient toolkit for a wide range of compliant mechanisms with complex configurations [198][199][200][201][202][203]. Pham and Chen [198] employed the compliance matrix method for parallel compliant mechanisms, while this method was extensively used to analyze flexure-based precision positioning stages by the groups of Li, Xu [82][83][84]199] and other researchers [204,205]. However, it is difficult to obtain the detailed displacements in compliant mechanisms.…”

Section: Keymentioning

confidence: 99%

“…A general two-port kinetostatic model of compliant mechanisms was also established based on the compliance matrix method in Ref. [205].…”

Section: Rhombicmentioning

confidence: 99%

See 2 more Smart Citations

Kinetostatic and Dynamic Modeling of Flexure-Based Compliant Mechanisms: A Survey

Ling

Howell

Cao

et al. 2020

Applied Mechanics Reviews

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150

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Flexure-based compliant mechanisms are becoming increasingly promising in precision engineering, robotics, and other applications due to the excellent advantages of no friction, no backlash, no wear, and minimal requirement of assembly. Because compliant mechanisms have inherent coupling of kinematic-mechanical behaviors with large deflections and/or complex serial-parallel configurations, the kinetostatic and dynamic analyses are challenging in comparison to their rigid-body counterparts. To address these challenges, a variety of techniques have been reported in a growing stream of publications. This paper surveys and compares the conceptual ideas, key advances, and applicable scopes, and open problems of the state-of-the-art kinetostatic and dynamic modeling methods for compliant mechanisms in terms of small and large deflections. Future challenges are discussed and new opportunities for extended study are highlighted as well. The presented review provides a guide on how to select suitable modeling approaches for those engaged in the field of compliant mechanisms.

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Section: Rhombicmentioning

confidence: 89%

Section: Keymentioning

confidence: 99%

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Kinetostatic and Dynamic Modeling of Flexure-Based Compliant Mechanisms: A Survey

Ling

Howell

Cao

et al. 2020

Applied Mechanics Reviews

Self Cite

150

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“…The output of the micro gripper x(t) (Figure 2) can be modelled through a set of geometric relationships based on the initial state of the gripper [29]. Two key displacement amplification techniques were used in the design of the gripper: firstly, a bridge amplifier [30], which converts horizontal motion to vertical motion by deflecting two parallel beams [31] and, secondly, a simple lever to translate the motion to the gripper tips. Because of this, the modelling has been split into two sections, firstly the bridge amplifier with initial design constants u0, L0, w and secondly the upper compliant section with a, b, h0 and L0I as defined in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Development of a Novel Modular Compliant Gripper for Manipulation of Micro Objects

Lofroth

Avci

2019

Micromachines

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This paper proposes a modular gripping mechanism for the manipulation of multiple objects. The proposed micro gripper combines traditional machining techniques with MEMS technologies to produce a modular mechanism consisting of a sturdy, compliant aluminium base and replaceable end-effectors. This creates an easily-customisable solution for micro manipulation with an array of different micro tips for different applications. We have provided the kinematic analysis for the gripper to predict the output and have also optimised design parameters based on FEA (finite element analysis) simulation and the effects of altering flexure beam lengths. The gripper is operated by a piezo actuator capable of 18 μ m displacement at 150 V of applied DC voltage. This is then amplified by a factor of 8.1 to a maximum tip displacement of 154 μ m. This is achieved by incorporating bridge and lever amplifying techniques into the design. An initial experimental analysis of the micro gripper is provided to investigate the performance of the micro gripper and to gauge the accuracy of the theory and simulation through comparison with experimental results.

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“…Piezo stacks as actuators have the advantage of fast response and high resolution for low levels of travel (Aphale et al, 2008; Xu, 2015). There are a wide variety of frame topologies that have been used for positioning, such as bridge, rhombus and cymbal shaped structures that employ a range of flexure hinge joints (Cao et al, 2016; Ling et al, 2016). The range of methods used for modelling the amplification ratio of such devices is equally diverse, employing pin joint analysis (Lobontiu and Garcia, 2003), spring analogies (Ma et al, 2006), energy methods (Elsisy et al, 2015; Ling and Cao, 2016) and various beam theories (Qi et al, 2015; Ye et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Modelling and optimisation of a force amplification energy harvester

Evans

Tang

2018

Journal of Intelligent Material Systems and Structures

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A flexure frame mechanism is a device historically used to amplify the displacement of an actuator with limited travel, such as a piezoelectric stack actuator. Conversely, these mechanisms may be used as a generator to amplify the force applied to piezoelectric transducers. This in turn can greatly increase the harvested power. Previous studies have used a variety of methods to analyse the amplification factor of a flexure frame mechanism operating as an actuator in displacement mode, as opposed to a generator in force amplification mode. The effects on the performance of such a device when operating in force amplification mode are not as well understood. In this study, an analysis of the force amplification of a flexure frame mechanism is conducted. A model of the force amplification factor based on the material properties and geometry of the device is developed for use as an optimisation and design tool. The analytical findings are compared against finite element analysis simulation and experimental results for validation. The effect of the stiffness of the central piezoelectric stack and the maximum stresses developed in the frame are determined to be critical parameters in determining the effectiveness of the mechanism as an energy harvester.

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Generalized constitutive equations for piezo-actuated compliant mechanism

Cited by 31 publications

References 29 publications

Kinetostatic and Dynamic Modeling of Flexure-Based Compliant Mechanisms: A Survey

Kinetostatic and Dynamic Modeling of Flexure-Based Compliant Mechanisms: A Survey

Development of a Novel Modular Compliant Gripper for Manipulation of Micro Objects

Modelling and optimisation of a force amplification energy harvester

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