Research on three-stage amplified compliant mechanism-based piezo-driven microgripper

Chen, Xiao; Deng, Zilong; Hu, Siya; Gao, Jingbo

doi:10.1177/1687814020911470

Cited by 13 publications

(6 citation statements)

References 37 publications

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“…The interaction force F r can be obtained by solving equation (12). Then, F r is substituted into equations ( 1), ( 3), ( 4), ( 9), (10), and (11). Based on the above information, u in and u out can be respectively derived from equations (7) and (6).…”

Section: Amplification Ratiomentioning

confidence: 99%

“…The sensitivities ∂u b 4y (x)=∂x, l 3 ∂u h 4z (x)=∂x and ∂u b 5y (x)=∂x in the equation ( 16) can be deduced by analyzing equations ( 9) and (10). By deriving analytical equations ( 1) and ( 4), partial derivatives ∂u b 1y (x)=∂x, (l 1 + l 2 )∂u h 1z (x)=∂x, and ∂u b 3y (x)=∂x are obtained.…”

Section: Sensitivity Analysis and Solutionmentioning

confidence: 99%

“…[5][6][7][8] Tang et al designed a novel flexure-based 3-degree-freedom elliptical micropositioning motion stage to obtain translation motions along the x, y, and z directions with high working bandwidth. 9 A micro gripper based three-stage amplified compliant mechanism actuated by the PZT was achieved to grip the micro parts by Chen et al 10 It can be seen that the compliant mechanism is the better choice to design the high-precision focusing mechanism. 11,12 In virtue of the larger output force, higher stiffness and fast response speed, the PZT actuator is usually used for ultra-precision motion and positioning.…”

Section: Introductionmentioning

confidence: 99%

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Optimization design of compliant focusing mechanism for space optical camera with light weight

Liu

et al. 2022

Advances in Mechanical Engineering

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Thermal radiation and vacuum lead to the deformation of bearing cylinder with carbon fiber composites which generates the defocus phenomenon for space optical camera. As heavier weight and higher complexity of the rigid focusing mechanism for the space optical camera, a novel compliant focusing mechanism with lighter weight and simple structure was designed and tested in this paper. In order to achieve stroke range and ensure image quality for the compliant focusing mechanism, micro driving displacement from the piezoelectric ceramics was amplified by two-stage flexible hinge lever-type mechanism. Taking the size parameters of the flexure hinges and beams as the design variables, an optimization model of the compliant focusing mechanism was established in which minimizing weight was considered as objection function under the stroke requirements. Consequently, optimal structure parameters of the compliant focusing mechanisms under different input forces can be obtained under the allowable stress and lighter weight. The effectiveness of the proposed compliant focusing mechanism was verified by the simulations and experiments. The results show that the compliant focusing mechanism can achieve a stroke of 2 mm for the focal plane assembly. The proposed method provided a new idea to design the focusing mechanism with lighter weight, simpler structure and higher reliability.

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Section: Amplification Ratiomentioning

confidence: 99%

Section: Sensitivity Analysis and Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimization design of compliant focusing mechanism for space optical camera with light weight

Liu

et al. 2022

Advances in Mechanical Engineering

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“…Therefore, the flexible amplifying mechanism is mostly used in occasions requiring a large stroke. It can not only solve the influence of the gap on the transmission in the micro-displacement transmission, but also amplify the displacement [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of Amplifying Mechanism in Gas-Liquid Thermoelectric Power Device

Huang

Zhen-jun

2022

J. Phys.: Conf. Ser.

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Aiming at the small output displacement of the gas-liquid temperature difference power device, a flexible hinge displacement amplification system was designed and optimized using the lever principle. The formula for calculating the magnification of the lever-type flexible hinge mechanism was derived by taking into account the offset of the flexible hinge's rotational center. Likewise, consider how the parameters of the mechanism affect the output performance of the amplifying mechanism. Combining SolidWorks and Workbench to improve the amplifying mechanism's parameters, find the best value for the parameters, and experimentally validate the optimized results. The research shows that the error between the experimental data and the finite element simulation value is 2.49%, which verifies the correctness of the simulation model. The design goals of high magnification of the mechanism and output after displacement amplification are realized.

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“…The 1R (R: revolute) PRB model regards a cantilever beam as two rigid links joined at a revolute pivot via a torsion spring 26,27 and thus achieves a trade-off between simplicity and accuracy. Chen et al 28 and Ding et al 29 analyzed the performances of notch-type mechanisms and optimized their structural parameters using the 1R PRB method. The PRB method can also be expanded to analyze spatial compliant mechanisms and predict their dynamic characteristics.…”

Section: Introductionmentioning

confidence: 99%

Adaptive pseudo-rigid-body model for generalized cross-spring pivots under combined loads

Wang

Sun

Wang

et al. 2014

Advances in Mechanical Engineering

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Generalized cross-spring pivots (CSPs) are widely used as revolute joints in precision machinery. However, pseudo-rigid-body (PRB) models cannot capture the parasitic motions of a generalized CSP exactly under combined loads; moreover, the characteristic parameters used in PRB methods must be recomputed using optimization techniques. In this study, we develop two simple and accurate PRB models for generalized CSPs. First, a PRB method for a beam is developed based on the beam constraint model and the instantaneous center model, where the beam is modeled as two rigid links joined at a pivot via a torsion spring. Subsequently, two PRB models of the generalized CSP, comprising a four-bar model for accuracy and a pin-joint model for stiffness, are constructed based on a kinematic analysis using the proposed PRB method. A deflection characteristic analysis is then conducted to determine the relationship between the proposed model and the existing models. Finally, the PRB models for the pivot under the action of combined loads are validated via finite element analysis. The error evaluation indicates that the proposed PRB models are more accurate than the results from existing methods. The PRB models proposed here can be used in parametric design of compliant mechanisms.

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Research on three-stage amplified compliant mechanism-based piezo-driven microgripper

Cited by 13 publications

References 37 publications

Optimization design of compliant focusing mechanism for space optical camera with light weight

Optimization design of compliant focusing mechanism for space optical camera with light weight

Design and Optimization of Amplifying Mechanism in Gas-Liquid Thermoelectric Power Device

Adaptive pseudo-rigid-body model for generalized cross-spring pivots under combined loads

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